Pump mechanical seal static ring structure with self-lubricating groove

Abstract

The utility model discloses a pump mechanical seal static ring structure with a self-lubricating groove, which comprises a static ring body, a first annular groove is arranged on the static ring body, the first annular groove is used for installing a movable ring body, a plurality of radiation grooves are arranged in the first annular groove, a gland is abutted against the static ring body, a plurality of oil liquid cavities and screw holes are arranged on the gland, and the oil liquid cavities and the screw holes are communicated with the first annular groove. A plurality of first channels and second channels are formed in the static ring body, the first channels are communicated with the second channels, the ends, away from the second channels, of the first channels are communicated with the oil liquid cavity, the second channels are communicated with the radiation grooves, a third channel is formed in the static ring body, an oil return opening is formed in the oil liquid cavity, and a fifth channel is formed in the gland. And the third channel is communicated with the fifth channel. Lubricating oil is contained in the radiation grooves, so that an uninterrupted oil film is formed between the movable ring body and the static ring body, the lubricating uniformity is improved, and the service life of the movable ring body and the service life of the static ring body are prolonged.

Description

Technical Field

[0001] This utility model relates to the field of sealing stationary ring technology, and in particular to a pump mechanical seal stationary ring structure with a self-lubricating groove. Background Technology

[0002] As industrial equipment develops towards higher pressure, higher speed, and higher reliability, mechanical seals, as core components of pumps, directly affect the operating efficiency and service life of the equipment. In fields such as petrochemicals and energy power, mechanical seals need to operate stably for extended periods under extreme conditions, placing higher demands on the lubrication of the sealing face. Currently, in the industry, mechanical seals primarily achieve sealing through the tight fit between the end faces of the rotating and stationary rings.

[0003] In existing technologies, the conventional stationary ring end face is usually a planar structure. It is difficult for the lubricating medium to evenly cover the entire contact surface during high-speed rotation. Local areas are prone to overheating, wear, or even thermal cracking due to insufficient lubrication, which shortens the seal life.

[0004] To address this issue, a pump mechanical seal stationary ring structure with a self-lubricating groove is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a pump mechanical seal stationary ring structure with a self-lubricating groove to solve the problems existing in the prior art, thereby improving the uniformity of lubrication of the stationary ring and extending its service life.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a pump mechanical seal stationary ring structure with a self-lubricating groove, comprising:

[0007] The stationary ring body has a first annular groove for mounting a moving ring body. The first annular groove contains several radial grooves arranged circumferentially. A pressure cap abuts against the stationary ring body. The pressure cap has several oil chambers and screw holes, which are connected. The stationary ring body contains several first and second channels, which are connected. One end of the first channel away from the second channel is connected to the oil chamber. The second channel is connected to the radial grooves. A third channel is located on the side of the radial grooves away from the second channel. An oil return port is located in one of the oil chambers. A fifth channel is located in the pressure cap, connected to the fifth channel. The third channel is also connected to the fifth channel.

[0008] Preferably, a second annular groove is formed inside the first annular groove, the second annular groove is connected to the radiation groove, and the second channel is connected to the second annular groove.

[0009] Preferably, a third annular groove is formed inside the first annular groove, the third annular groove is connected to the radiation groove, the third channel is connected to the third annular groove, and the third annular groove is located outside the second annular groove.

[0010] Preferably, a filter screen is fixedly connected inside the oil chamber, a plurality of first oil outlets are provided on the oil chamber, and a fourth channel is provided on the pressure cap. The first oil outlets are connected to the fourth channel, and the fourth channel is connected to the first channel.

[0011] Preferably, the pressure cap has a plurality of fourth annular grooves, the plurality of fourth annular grooves are located on the same end face of the pressure cap, the fourth annular grooves are connected to the fourth channel, and the fourth annular grooves are used to connect the fourth channel and the first channel.

[0012] Preferably, the static ring body has a plurality of storage cavities, the storage cavities are located near the third channel, the storage cavities and the third channel are connected by a connecting channel, and an inclined stop block is fixedly connected in the third channel, the inclined stop block being located near the connecting channel.

[0013] Preferably, the pressure cap has a fifth annular groove, which communicates with the fifth channel and is used to connect the fifth channel and the third channel.

[0014] This invention discloses the following technical effects: In this device, the stationary ring body and the rotating ring body cooperate. The first annular groove is used to accommodate the rotating ring body, and the first annular groove occupies a large area of ​​the end face of the stationary ring body. The radial groove is used for the inflow of lubricating oil, so that there will be an oil film between the rotating ring body and the stationary ring body, and the oil film will not be reduced due to sudden pressure changes. The oil chamber is used to store lubricating oil, and the screw hole is used to pour in lubricating oil, and then it can be tightened with a screw. The first channel converges into the second channel. The main function of multiple first channels is to prevent the lubricating oil from not flowing out when the pressure cap changes direction. The lubricating oil enters the radial groove through the second channel. Under the high-speed rotation of the rotating ring body, the lubricating oil in the radial groove will flow to the third channel due to centrifugal force, and then flow back to the oil chamber through the fifth channel, thereby generating a micro-circulation of lubricating oil. In this invention, there is lubricating oil in the radial groove, which makes the rotating ring body and the stationary ring body have an uninterrupted oil film, improves the uniformity of lubrication, and thus extends the service life of the rotating ring body and the stationary ring body. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the stationary ring structure of the pump mechanical seal with self-lubricating groove according to this utility model;

[0017] Figure 2 for Figure 1 Enlarged view of point a in the middle;

[0018] Figure 3 for Figure 2 Enlarged view of point b in the middle;

[0019] Figure 4 This is a front view of the stationary ring body of this utility model;

[0020] The components are as follows: 1. Stationary ring body; 2. First annular groove; 3. Dynamic ring body; 4. Radial groove; 5. Pressure cap; 6. Oil chamber; 7. Screw hole; 8. First channel; 9. Second channel; 10. Third channel; 11. Fifth channel; 12. Second annular groove; 13. Third annular groove; 14. Filter screen; 15. Fourth channel; 16. Fourth annular groove; 17. Storage chamber; 18. Connecting channel; 19. Inclined stop; 20. Fifth annular groove; 21. Sealing ring. 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] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figure 1-4 This utility model provides a pump mechanical seal stationary ring structure with a self-lubricating groove, comprising:

[0024] A stationary ring body 1 has a first annular groove 2 for mounting a moving ring body 3. Several radial grooves 4 are arranged circumferentially within the first annular groove 2. A pressure cap 5 abuts against the stationary ring body 1. Several oil chambers 6 and screw holes 7 are provided on the pressure cap 5, which are connected. Several first channels 8 and second channels 9 are provided within the stationary ring body 1, connected to each other. The end of the first channel 8 furthest from the second channel 9 is connected to the oil chamber 6, and the second channel 9 is connected to the radial grooves 4. A third channel 10 is provided within the stationary ring body 1, located on the side of the radial grooves 4 furthest from the second channel 9. An oil return port is provided within the oil chamber 6. A fifth channel 11 is provided within the pressure cap 5, connected to the oil return port and the fifth channel 11. The third channel 10 is also connected to the fifth channel 11.

[0025] In this device, the stationary ring body 1 and the rotating ring body 3 cooperate. The first annular groove 2 is used to accommodate the rotating ring body 3. The first annular groove 2 occupies a large area of ​​the end face of the stationary ring body 1. The radial groove 4 is used for the flow of lubricating oil. In this way, there will be an oil film between the rotating ring body 3 and the stationary ring body 1, and the oil film will not be reduced due to pressure change. The radial groove 4 is a self-lubricating groove. The oil chamber 6 is used to store lubricating oil. The screw hole 7 is used to pour in lubricating oil and then tighten it with a screw. The first channel 8 converges into the second channel 9. The main function of multiple first channels 8 is to prevent the lubricating oil from not flowing out due to the change of direction of the pressure cap 5. The lubricating oil enters the radial groove 4 through the second channel 9. Under the high-speed rotation of the rotating ring body 3, the lubricating oil in the radial groove 4 will flow to the third channel 10 due to centrifugal force, and then flow back to the oil chamber 6 through the fifth channel 11, thereby generating a micro-circulation of lubricating oil.

[0026] In a further optimized design, a second annular groove 12 is formed inside the first annular groove 2. The second annular groove 12 is connected to the radiation groove 4, and the second channel 9 is connected to the second annular groove 12.

[0027] The edge of the moving ring body 3 enters the second annular groove 12, making the moving ring body 3 fit more tightly with the first annular groove 2, and at the same time facilitating the flow of lubricating oil from the second channel 9 into the radiation groove 4.

[0028] In a further optimized design, a third annular groove 13 is provided inside the first annular groove 2. The third annular groove 13 is connected to the radiation groove 4, and the third channel 10 is connected to the third annular groove 13. The third annular groove 13 is located outside the second annular groove 12.

[0029] The edge of the moving ring body 3 enters the third annular groove 13, making the moving ring body 3 fit more tightly with the first annular groove 2. When the lubricating oil flows outward due to centrifugal force, the third annular groove 13 can collect the lubricating oil and also accommodate the powdery debris generated by the friction between the moving ring body 3 and the stationary ring body 1.

[0030] The scheme is further optimized. A filter screen 14 is fixedly connected inside the oil chamber 6. Several first oil outlets are opened on the oil chamber 6. A fourth channel 15 is opened on the pressure cap 5. The first oil outlets are connected to the fourth channel 15. The fourth channel 15 is connected to the first channel 8.

[0031] The filter screen 14 is used to filter impurities in the lubricating oil. The lubricating oil enters the fourth channel 15 through the first oil outlet, and then enters the first channel 8 from the fourth channel 15.

[0032] In a further optimized design, the pressure cap 5 is provided with several fourth annular grooves 16, which are located on the same end face of the pressure cap 5. The fourth annular grooves 16 are connected to the fourth channel 15 and are used to connect the fourth channel 15 and the first channel 8.

[0033] The function of the fourth annular groove 16 is to facilitate docking with the first channel 8, making it easier to connect the first channel 8 and the fourth channel 15 when installing the pressure cap 5.

[0034] The scheme is further optimized by providing several storage cavities 17 inside the static ring body 1. The storage cavities 17 are located near the third channel 10. A connecting channel 18 connects the storage cavities 17 and the third channel 10. An inclined stop 19 is fixedly connected inside the third channel 10 and is located near the connecting channel 18.

[0035] The storage chamber 17 is used to store the powdery debris generated by the friction between the rotating ring body 3 and the stationary ring body 1 to prevent blockage of the pipeline. The inclined baffle 19 facilitates the entry of debris into the storage chamber 17. When the lubricating oil flows into the third channel 10, some larger debris, due to its weight, is blocked by the inclined baffle 19 and is not easily washed away by the oil, thus slowly flowing into the storage chamber 17.

[0036] The scheme is further optimized by providing a fifth annular groove 20 on the pressure cap 5. The fifth annular groove 20 is connected to the fifth channel 11 and is used to connect the fifth channel 11 and the third channel 10.

[0037] The function of the fifth annular groove 20 is to facilitate the connection between the third channel 10 and the fifth channel 11 when the pressure cap 5 is installed.

[0038] The working principle of this device is as follows: During installation, lubricating oil is poured into the oil chamber 6 and then screwed into the screw hole 7. Due to capillary action, the lubricating oil will slowly flow into the first channel 8 and the second channel 9, and then into the second annular groove 12 and the radial groove 4. When the moving ring body 3 rotates at high speed, the lubricating oil in the radial groove 4 will flow to the third annular groove 13 and the third channel 10 due to centrifugal force. The third annular groove 13 can collect the lubricating oil and also accommodate the powdery debris generated by the friction between the moving ring body 3 and the stationary ring body 1. The oil then flows back into the oil chamber 6 through the fifth channel 11, thereby generating a micro-circulation of lubricating oil.

[0039] In another embodiment, a sealing ring 21 is also installed between the gland 5 and the stationary ring body 1.

[0040] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0041] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A pump mechanical seal stationary ring structure with a self-lubricating groove, characterized in that, include: A stationary ring body (1) has a first annular groove (2) for mounting a moving ring body (3). A plurality of radial grooves (4) are arranged circumferentially within the first annular groove (2). A pressure cap (5) abuts against the stationary ring body (1). The pressure cap (5) has a plurality of oil cavities (6) and screw holes (7) connected to each other. A plurality of first channels (8) and second channels (9) are formed within the stationary ring body (1). (8) and the second channel (9) are connected. The end of the first channel (8) away from the second channel (9) is connected to the oil cavity (6). The second channel (9) is connected to the radiation groove (4). A third channel (10) is opened in the static ring body (1). The third channel (10) is located on the side of the radiation groove (4) away from the second channel (9). An oil return port is opened in the oil cavity (6). A fifth channel (11) is opened in the pressure cap (5). The oil return port is connected to the fifth channel (11). The third channel (10) is connected to the fifth channel (11).

2. The pump mechanical seal stationary ring structure with self-lubricating groove according to claim 1, characterized in that: A second annular groove (12) is provided in the first annular groove (2), the second annular groove (12) is connected to the radiation groove (4), and the second channel (9) is connected to the second annular groove (12).

3. The pump mechanical seal stationary ring structure with self-lubricating groove according to claim 2, characterized in that: A third annular groove (13) is provided in the first annular groove (2). The third annular groove (13) is connected to the radiation groove (4). The third channel (10) is connected to the third annular groove (13). The third annular groove (13) is located outside the second annular groove (12).

4. The stationary ring structure of a pump mechanical seal with a self-lubricating groove according to claim 1, characterized in that: A filter screen (14) is fixedly connected inside the oil chamber (6). Several first oil outlets are opened on the oil chamber (6). A fourth channel (15) is opened on the pressure cap (5). The first oil outlets are connected to the fourth channel (15). The fourth channel (15) is connected to the first channel (8).

5. The pump mechanical seal stationary ring structure with self-lubricating groove according to claim 4, characterized in that: The pressure cap (5) has a plurality of fourth annular grooves (16) located on the same end face of the pressure cap (5). The fourth annular grooves (16) are connected to the fourth channel (15) and are used to connect the fourth channel (15) and the first channel (8).

6. The stationary ring structure of a pump mechanical seal with a self-lubricating groove according to claim 1, characterized in that: The static ring body (1) has several storage cavities (17) inside. The storage cavities (17) are located near the third channel (10). A connecting channel (18) connects the storage cavities (17) and the third channel (10). An inclined stop (19) is fixedly connected inside the third channel (10). The inclined stop (19) is located near the connecting channel (18).

7. The stationary ring structure of a pump mechanical seal with a self-lubricating groove according to claim 1, characterized in that: The pressure cap (5) has a fifth annular groove (20) which is connected to the fifth channel (11). The fifth annular groove (20) is used to connect the fifth channel (11) and the third channel (10).

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