Capillary mechanical seal end face structure

Abstract

The utility model relates to mechanical seal technical field, concretely relates to capillary tube type mechanical seal end face structure. Including the dynamic ring of circular ring shape, the static ring is rotatively connected at the dynamic ring top surface, the top surface of dynamic ring and corresponding the bottom surface of static ring contact, the contact surface between dynamic ring and static ring is set up with several capillary tube grooves. The utility model discloses through capillary tube groove and its branch, realized even in the case where liquid side pressure is not high, the capillary tube groove that the dynamic ring or static ring end face opened can realize liquid to the wetting of sealing end face under the joint action of surface tension, adhesion and cohesion, the liquid of wetting can effectively eliminate the adhesion phenomenon between dynamic ring and static ring, greatly reduces the starting torque of machine, guarantees the smooth start of fluid rotating machinery, reduces the friction loss between dynamic ring and static ring when running, reduces the consumables and reduces the maintenance cost while guaranteeing safe operation.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, and in particular to the end face structure of a capillary mechanical seal. Background Technology

[0002] Mechanical seals are commonly used shaft sealing devices in rotating fluid machinery to prevent leakage of the liquid-side medium to the atmosphere. The inner and outer edges of the rotating and stationary rings in a mechanical seal correspond to the liquid side and the atmospheric side, respectively. The contact surface between the rotating and stationary rings is the sealing end face. Under normal operating conditions, this sealing end face is generally in a state of mixed friction or boundary friction, where the friction coefficient is very small, and the power consumption and wear of the rotating and stationary rings are also very small. However, when restarting after a long period of shutdown, the lack of fluid lubrication between the sealing end faces of the rotating and stationary rings, coupled with their very smooth and closely fitted surfaces, makes them prone to sticking together. If the equipment is started while stuck, the relatively rotating rotating and stationary rings are in a state of dry friction, resulting in a high friction coefficient and significant adhesive wear. This often damages the sealing end face, and in severe cases, may even cause the motor to burn out. This increases the labor and material costs for maintaining the sealing mechanical structure and may even affect the safety, sealing performance, and stability of the equipment. Utility Model Content

[0003] In view of this, the purpose of this utility model is to propose a capillary mechanical seal end face structure, in which liquid exists between the sealing end faces whether the machine is running or shut down, so as to solve the problem of mutual adhesion between the dynamic and static rings when restarting after a long period of shutdown.

[0004] To achieve the above objectives, this utility model provides a capillary mechanical seal end face structure, including a rotating ring in the shape of a ring, a stationary ring in the shape of a ring rotatably connected to the top surface of the rotating ring, the top surface of the rotating ring contacting the bottom surface of the corresponding stationary ring, and a plurality of capillary grooves for lubrication being formed on the top surface of the rotating ring or the bottom surface of the stationary ring.

[0005] According to the technical solution provided in this application, one end of the capillary groove is connected to the inner edge or outer edge of the contact surface between the moving ring and the stationary ring; the other end of the capillary groove is closed, and the closed end of the capillary groove does not contact the arc edge of the moving ring or the stationary ring.

[0006] According to the technical solution provided in the example of this application, the diameter of the capillary groove is 0.1 to 10 μm.

[0007] According to the technical solution provided in this application example, the capillary groove has several branches on both sides for uniform lubrication.

[0008] According to the technical solution provided in this application, a plurality of capillary grooves are opened at equal intervals around the top surface of the moving ring or the bottom surface of the stationary ring.

[0009] The beneficial effects of this invention are as follows: At the sealing point of fluid rotating machinery, even when the liquid side pressure is not high, the capillary groove opened between the end faces of the rotating ring or stationary ring can achieve liquid wetting of the sealing end face under the combined action of surface tension, adhesion and cohesion. The wetting liquid can effectively eliminate the adhesion between the rotating ring and the stationary ring, greatly reduce the starting torque of the machine, ensure the smooth start-up of the fluid rotating machinery, reduce the frictional loss between the rotating ring and the stationary ring during operation, and reduce consumables and maintenance costs while ensuring safe operation. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0012] Figure 2 This is a schematic diagram of the overall disassembled structure of an embodiment of the present utility model;

[0013] Figure 3 This is a partial structural schematic diagram of the moving ring in an embodiment of this utility model.

[0014] The diagram is marked as follows:

[0015] 1. Moving ring; 10. Capillary groove; 2. Stationary ring. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0017] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the field described herein. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0018] Please see Figures 1-3 The capillary mechanical seal end face structure includes a rotating ring 1 in the shape of a ring, and a stationary ring 2 in the shape of a ring rotatably connected to the top surface of the rotating ring 1. The top surface of the rotating ring 1 contacts the bottom surface of the corresponding stationary ring 2. Several capillary grooves 10 for lubrication are opened on the top surface of the rotating ring 1 or the bottom surface of the stationary ring 2. Capillary grooves 10 can also be opened on both sides of the contact surface between the rotating ring 1 and the stationary ring 2.

[0019] Specifically, if the outer edge of the moving ring 1 and the stationary ring 2 is the liquid side and the inner edge is the atmospheric side, then one end of the capillary groove 10 is connected to the outer edge of the contact surface between the moving ring 1 and the stationary ring 2; if the inner edge of the moving ring 1 and the stationary ring 2 is the liquid side and the outer edge is the atmospheric side, then one end of the capillary groove 10 is connected to the inner edge of the contact surface between the moving ring 1 and the stationary ring 2; thus facilitating the entry of liquid into the capillary groove 10, and allowing the liquid to branch through the capillary into the contact end face between the moving ring 1 and the stationary ring 2; the other end of the capillary groove 10 is closed, and the closed end of the capillary groove 10 does not contact the arc edge of the moving ring 1 or the stationary ring 2, thereby preventing liquid leakage.

[0020] Preferably, the diameter of the capillary groove 10 is 0.1 to 10 μm.

[0021] Preferably, a plurality of capillary grooves 10 are opened at equal intervals around the top surface of the moving ring 1 or the bottom surface of the stationary ring 2, and the capillary grooves 10 can be provided with multiple levels of branches as needed, so as to ensure that the entire sealing end face is uniformly covered by capillaries, thereby uniformly lubricating the contact end face.

[0022] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0023] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A capillary mechanical seal end face structure, comprising a circularly shaped moving ring (1), characterized in that, The top surface of the moving ring (1) is rotatably connected to a stationary ring (2) in the shape of a circular ring. The top surface of the moving ring (1) is in contact with the bottom surface of the corresponding stationary ring (2). A plurality of capillary grooves (10) for lubrication are provided on the top surface of the moving ring (1) or the bottom surface of the stationary ring (2).

2. The capillary mechanical seal end face structure according to claim 1, characterized in that, One end of the capillary groove (10) is connected to the inner or outer edge of the contact surface between the moving ring (1) and the stationary ring (2); the other end of the capillary groove (10) is closed, and the closed end of the capillary groove (10) does not contact the arc edge of the moving ring (1) or the stationary ring (2).

3. The capillary mechanical seal end face structure according to claim 1, characterized in that, The diameter of the capillary groove (10) is 0.1 to 10 μm.

4. The capillary mechanical seal end face structure according to claim 1, characterized in that, Several branches for uniform lubrication are provided on both sides of the capillary groove (10).

5. The capillary mechanical seal end face structure according to claim 1, characterized in that, Several capillary grooves (10) are opened at equal intervals around the top surface of the moving ring (1) or the bottom surface of the stationary ring (2).

Images