Mechanical sealing structure and pump body system
By improving the mechanical seal structure to a one-end face seal and self-flushing method, combined with a large spring compensation mechanism, the problem of sealing leakage under high temperature and impurity environments was solved, resulting in a longer service life and reduced maintenance costs.
Patent Information
- Application Number
- CN202520700407.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-04-11
AI Technical Summary
Existing mechanical seal structures are prone to gumming and leakage in high-temperature and impurity workshop environments. Existing external flushing methods also cause leakage when the spring gap is too small, resulting in slower flow or clumping.
It adopts a one-end face sealing method, sets up a stationary ring assembly and a dynamic ring assembly, and changes to a self-flushing method. The pump outlet liquid is introduced into the stationary ring assembly through the flushing channel and discharged from the suction end to form a self-circulation. Combined with a large spring compensation mechanism and shaft sleeve structure, it reduces friction and wear.
It improves the applicability of mechanical seals in high-temperature and impurity environments, reduces the risk of leakage, extends service life, and lowers maintenance costs.
Smart Images
Figure CN223964875U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical seal technology, and in particular to a mechanical seal structure and pump system. Background Technology
[0002] Existing mechanical seal structures employ a two-end face sealing method, i.e., setting two sets of dynamic ring assemblies and two sets of stationary ring assemblies, and using a small spring compensation mechanism, with external flushing. This structure is unsuitable for pump body seals in high-temperature, high-impurity environments within workshops. The mechanical seal is prone to gumming, leading to leakage. When flushing fluid enters the cavity of the compensation mechanism from the outside, the conveyed medium, due to its viscosity or high impurity content, and the small spring clearance, will experience a slowdown in flow rate or even agglomeration, causing leakage at the mechanical seal. Utility Model Content
[0003] The purpose of this invention is to provide a mechanical seal structure and pump body system to alleviate the problems of existing mechanical seal structures being unsuitable for pump body seals in high-temperature and impurity environments, and mechanical seals being prone to gumming and leakage.
[0004] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:
[0005] In a first aspect, the present invention provides a mechanical seal structure, comprising: a stationary ring assembly, a rotating ring assembly, and a compensation mechanism. The stationary ring assembly and the rotating ring assembly are both disposed outside a rotating shaft. The stationary ring assembly is connected to the rotating ring assembly. The compensation mechanism is disposed between the rotating ring assembly and the rotating shaft. The stationary ring assembly is provided with a flushing channel for the flow of flushing fluid.
[0006] Furthermore, the stationary ring assembly includes a stationary ring seat and a stationary ring. The stationary ring seat is sleeved on the rotating shaft, the flushing channel is disposed on the stationary ring seat, the stationary ring is installed on the stationary ring seat, and the stationary ring is connected to the rotating ring assembly.
[0007] Furthermore, the stationary ring seat is provided with a connection hole, and the stationary ring is connected to the moving ring assembly through a connector.
[0008] Furthermore, the outer end face of the stationary ring seat is provided with a stationary ring sealing structure.
[0009] Furthermore, the moving ring assembly includes a moving ring seat and a moving ring. The moving ring seat is sleeved on the rotating shaft, the moving ring is installed on the moving ring seat, the moving ring is connected to the stationary ring, and the compensation mechanism is disposed between the moving ring and the rotating shaft.
[0010] Furthermore, a dynamic ring sealing structure is provided between the dynamic ring seat and the dynamic ring.
[0011] Furthermore, the compensation mechanism includes a spring wound between the moving ring and the rotating shaft.
[0012] Furthermore, it also includes a bushing, which is spaced apart from the rotating ring and is sleeved on the outside of the rotating shaft.
[0013] Furthermore, the stationary ring seat has a stepped hole structure.
[0014] Secondly, this utility model provides a pump body system, including the mechanical seal structure described in the first aspect.
[0015] This utility model brings at least the following beneficial effects:
[0016] This utility model provides a mechanical seal structure, including: a stationary ring assembly, a rotating ring assembly, and a compensation mechanism. The stationary ring assembly and the rotating ring assembly are both disposed outside the rotating shaft. The stationary ring assembly is connected to the rotating ring assembly. The compensation mechanism is disposed between the rotating ring assembly and the rotating shaft. The stationary ring assembly is provided with a flushing channel for the flow of flushing fluid.
[0017] This application modifies the sealing method of the mechanical seal structure, changing it from a two-end face sealing method to a one-end face sealing method, and only setting one stationary ring assembly and one rotating ring assembly. Simultaneously, the flushing method of the mechanical seal structure is changed from external flushing to self-flushing, where the liquid from the pump outlet is guided to the stationary ring assembly through a flushing channel and then discharged from the pump suction end, forming a self-circulation. These structural and flushing method changes make this mechanical seal structure suitable for pump body sealing in high-temperature, high-impurity environments within workshops, reducing the possibility of leakage at the mechanical seal, extending its service life and maintenance cycle, and lowering maintenance costs.
[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0020] Figure 1 A schematic diagram of the mechanical seal structure provided in an embodiment of this utility model;
[0021] Figure 2 Schematic diagram of the stationary ring seat provided in the embodiment of this utility model Figure 1;
[0022] Figure 3 Schematic diagram of the stationary ring seat provided in the embodiment of this utility model Figure 2 .
[0023] icon:
[0024] 100-Stationary ring assembly; 110-Stationary ring seat; 111-Flushing channel; 112-Connecting hole; 120-Stationary ring; 130-Stationary ring sealing structure; 200-Dynamic ring assembly; 210-Dynamic ring seat; 220-Dynamic ring; 230-Dynamic ring sealing structure; 300-Compensation mechanism; 310-Spring; 400-Shaft sleeve; 410-Positioning screw; 500-Rotating shaft. Detailed Implementation
[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units (SI) base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.
[0028] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0030] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other. Figure 1 A schematic diagram of the mechanical seal structure provided in an embodiment of this utility model; Figure 2 Schematic diagram of the stationary ring seat provided in the embodiment of this utility model Figure 1 ; Figure 3 Schematic diagram of the stationary ring seat provided in the embodiment of this utility model Figure 2 .
[0031] Example 1
[0032] Existing mechanical seal structures employ a two-end face sealing method, i.e., setting two sets of dynamic ring assemblies and two sets of stationary ring assemblies, and using a small spring compensation mechanism, with external flushing. This structure is unsuitable for pump body seals in high-temperature, high-impurity environments within workshops. The mechanical seal is prone to gumming, leading to leakage. When flushing fluid enters the cavity of the compensation mechanism from the outside, the conveyed medium, due to its viscosity or high impurity content, and the small spring clearance, will experience a slowdown in flow rate or even agglomeration, causing leakage at the mechanical seal.
[0033] In view of this, the present invention provides a mechanical seal structure, including: a stationary ring assembly 100, a rotating ring assembly 200, and a compensation mechanism 300. The stationary ring assembly 100 and the rotating ring assembly 200 are both disposed outside the rotating shaft 500. The stationary ring assembly 100 is connected to the rotating ring assembly 200. The compensation mechanism 300 is disposed between the rotating ring assembly 200 and the rotating shaft 500. The stationary ring assembly 100 is provided with a flushing channel 111 for the flow of flushing fluid.
[0034] This application modifies the sealing method of the mechanical seal structure, changing it from a two-end face sealing method to a one-end face sealing method, and only setting one stationary ring assembly 100 and one dynamic ring assembly 200. Simultaneously, the flushing method of the mechanical seal structure is changed from external flushing to self-flushing, where the liquid from the pump outlet is guided into the stationary ring assembly 100 through the flushing channel 111 and then discharged from the pump suction end, forming a self-circulation. These structural and flushing method changes make this mechanical seal structure suitable for pump body sealing in high-temperature, high-impurity environments within workshops, reducing the possibility of leakage at the mechanical seal, extending the service life and maintenance cycle, and lowering maintenance costs.
[0035] In an optional embodiment, the stationary ring assembly 100 includes a stationary ring seat 110 and a stationary ring 120. The stationary ring seat 110 is sleeved on the rotating shaft 500, the flushing channel 111 is disposed on the stationary ring seat 110, the stationary ring 120 is installed on the stationary ring seat 110, and the stationary ring 120 is connected to the rotating ring assembly 200.
[0036] Please see Figure 1 and Figure 2 The stationary ring seat 110 is located at one end of the rotating shaft 500. A flushing channel 111 is provided on the stationary ring seat 110. The liquid from the pump outlet is led to the stationary ring seat 110 through the flushing channel 111 and finally discharged from the pump suction end, thus forming a self-circulation. The stationary ring 120 is installed on the stationary ring seat 110 and is connected to the rotating ring assembly 200 through a connector.
[0037] Furthermore, the stationary ring seat 110 is provided with a connection hole 112, and the stationary ring 120 is connected to the rotating ring assembly 200 through a connector.
[0038] Please see Figure 2 and Figure 3 The opening direction of the connecting hole 112 is perpendicular to the opening direction of the flushing channel 111. The connector passes through the connecting hole 112 to connect and fix the stationary ring 120, the stationary ring seat 110 and the rotating ring assembly 200.
[0039] In an optional embodiment, a stationary ring sealing structure 130 is provided on the outer end face of the stationary ring seat 110.
[0040] Please see Figure 1 The stationary ring sealing structure 130 can adopt a stationary ring auxiliary sealing ring, which is fitted on the outer end face of the stationary ring seat 110 to play a sealing role.
[0041] In an optional embodiment, the rotating ring assembly 200 includes a rotating ring seat 210 and a rotating ring 220. The rotating ring seat 210 is sleeved on the rotating shaft 500, the rotating ring 220 is installed on the rotating ring seat 210, the rotating ring 220 is connected to the stationary ring 120, and the compensation mechanism 300 is disposed between the rotating ring 220 and the rotating shaft 500.
[0042] Please see Figure 1 The rotating ring seat 210 is fitted around the rotating shaft 500, and the rotating ring 220 is mounted on the rotating ring seat 210. The rotating ring 220 and the stationary ring 120 are connected and fixed by a connector. A compensation mechanism 300 is provided between the rotating ring 220 and the rotating shaft 500, which can compensate and buffer the movement of the rotating ring 220 and the rotating shaft 500, so that the overall operation of the mechanism remains stable.
[0043] In an optional embodiment, a dynamic ring sealing structure 230 is provided between the dynamic ring seat 210 and the dynamic ring 220.
[0044] Please see Figure 1 The dynamic ring sealing structure 230 can adopt a dynamic ring auxiliary sealing ring, which is fitted between the dynamic ring seat 210 and the dynamic ring 220 to play a sealing role.
[0045] In an optional embodiment, the compensation mechanism 300 includes a spring 310, which is wound between the moving ring 220 and the rotating shaft 500.
[0046] Please see Figure 1 In this embodiment, the compensation mechanism 300 adopts a multi-turn large spring structure, which can compensate and buffer the movement of the moving ring 220 and the rotating shaft 500.
[0047] In an optional embodiment, the mechanical seal structure further includes a bushing 400, which is spaced apart from the rotating ring 220 and is fitted over the rotating shaft 500.
[0048] Please see Figure 1 The bushing 400 is positioned by the positioning screw 410. The bushing 400 is located at the other end of the rotating shaft 500 and serves to reduce friction and wear between the rotating shaft 500 and external components.
[0049] In an optional embodiment, the stationary ring seat 110 has a stepped hole structure.
[0050] Please see Figure 2 and Figure 3 Setting the stationary ring seat 110 as a stepped hole structure can better match the rotating shaft 500 and better play the role of mechanical seal.
[0051] The working principle of this embodiment is as follows: The mechanical seal structure is fixed on the rotating shaft 500. During operation, the medium in the pump circulates and flushes the mechanical seal structure through the flushing channel 111. The self-flushing of the medium achieves circulating cooling, which reduces operating costs and also avoids coolant leakage.
[0052] Example 2
[0053] This utility model embodiment provides a pump body system, including the mechanical seal structure of Embodiment 1. Since the pump body system includes all the structures of the mechanical seal structure, it possesses all the beneficial effects of Embodiment 1, which will not be repeated here.
[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A mechanical seal structure, characterized in that, include: The system includes a stationary ring assembly, a rotating ring assembly, and a compensation mechanism. Both the stationary ring assembly and the rotating ring assembly are located outside the rotating shaft. The stationary ring assembly is connected to the rotating ring assembly. The compensation mechanism is located between the rotating ring assembly and the rotating shaft. The stationary ring assembly has a flushing channel for the flow of flushing fluid.
2. The mechanical seal structure according to claim 1, characterized in that, The stationary ring assembly includes a stationary ring seat and a stationary ring. The stationary ring seat is sleeved on the rotating shaft, the flushing channel is disposed on the stationary ring seat, the stationary ring is installed on the stationary ring seat, and the stationary ring is connected to the rotating ring assembly.
3. The mechanical seal structure according to claim 2, characterized in that, The stationary ring seat is provided with a connection hole, and the stationary ring is connected to the moving ring assembly through a connector.
4. The mechanical seal structure according to claim 3, characterized in that, The outer end face of the stationary ring seat is provided with a stationary ring sealing structure.
5. The mechanical seal structure according to claim 3, characterized in that, The rotating ring assembly includes a rotating ring seat and a rotating ring. The rotating ring seat is sleeved on the rotating shaft, the rotating ring is installed on the rotating ring seat, the rotating ring is connected to the stationary ring, and the compensation mechanism is disposed between the rotating ring and the rotating shaft.
6. The mechanical seal structure according to claim 5, characterized in that, A dynamic ring sealing structure is provided between the dynamic ring seat and the dynamic ring.
7. The mechanical seal structure according to claim 5, characterized in that, The compensation mechanism includes a spring, which is wound between the moving ring and the rotating shaft.
8. The mechanical seal structure according to claim 5, characterized in that, It also includes a bushing, which is spaced apart from the rotating ring and is sleeved on the outside of the rotating shaft.
9. The mechanical seal structure according to claim 2, characterized in that, The stationary ring seat has a stepped hole structure.
10. A pump system, characterized in that, Includes the mechanical seal structure as described in any one of claims 1-9.