Sewage mechanical sealing structure of double suction pump

Abstract

The utility model discloses a double suction pump sewage mechanical sealing structure, which comprises a shaft sleeve, a positioning seat, a spring seat, a movable ring, a pressing cover, a static ring and a limiting screw rod, the shaft sleeve is provided with the positioning seat, the positioning seat is provided with a spring, the other end of the spring is connected with the spring seat, the spring seat is provided with the movable ring, and the movable ring is connected with the pressing cover. A static ring clamping seat is arranged on the pressing cover, a static ring is placed in the static ring clamping seat, a limiting lead screw is installed on the pressing cover in a threaded mode, a limiting groove is formed in the static ring, and the limiting groove is connected with the limiting lead screw in a sliding mode. A worker does not need to open a pump shell and a sealing structure to adjust the gap between the static ring and the movable ring, the maintenance workload is reduced, the problem that the worker needs to use a tool to take down the static ring due to the fact that the static ring is tightly abutted against the pressing cover for a long time is solved, and replacement of parts is facilitated.

Description

Technical Field

[0001] The utility model relates to the relevant field of double-suction pumps, in particular to a sewage mechanical seal structure of a double-suction pump. Background Art

[0002] A mechanical seal is a device that prevents fluid leakage by maintaining contact and relative sliding between at least a pair of end faces perpendicular to the axis of rotation under the influence of fluid pressure, the elastic force of a compensating mechanism, and the cooperation of auxiliary seals. Mechanical seals are shaft seals for rotating machinery, such as centrifugal pumps, centrifuges, reactors, and compressors. Because the drive shaft runs through the interior and exterior of the equipment, a circumferential gap exists between the shaft and the equipment. The medium in the equipment can leak out through this gap. If the pressure inside the equipment falls below atmospheric pressure, air can leak into the equipment. Therefore, a shaft seal is essential to prevent leakage.

[0003] The existing device has the following shortcomings during use: when the gap between the dynamic ring and the static ring becomes larger and needs to be adjusted, the staff needs to open the pump casing and the sealing structure to adjust the gap between the static ring and the dynamic ring, which increases the maintenance workload; the dynamic ring is pressed against the static ring for a long time by the spring, and the mechanical seal structure needs to be replaced due to wear after a period of use; since the static ring is tightly pressed against the clamping cover for a long time, the staff needs to use tools to remove the static ring, which makes the replacement of parts inconvenient. Utility Model Content

[0004] The purpose of the utility model is to provide a sewage mechanical seal structure for a double-suction pump to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-suction pump sewage mechanical seal structure, comprising a sleeve, a positioning seat, a spring seat, a dynamic ring, a clamping cover, a static ring and a limit screw, a positioning seat is installed on the sleeve, a spring is installed on the positioning seat, the other end of the spring is connected to the spring seat, the dynamic ring is installed on the spring seat, a static ring holder is provided on the clamping cover, a static ring is placed in the static ring holder, a limit screw is threadedly installed on the clamping cover, a limit groove is provided on the static ring, the limit groove is slidably connected to the limit screw, the sleeve is put on the outside of the double-suction pump shaft, and the positioning seat is fixed to the sleeve by a locking piece, and then the spring is put on so that the two ends of the spring are respectively against the annular cavities provided on the positioning seat and the spring seat, and the clamp installed on the spring seat is connected with the dynamic ring. The slots fit together to complete the assembly of the dynamic ring, and the static ring is placed in the static ring holder provided on the clamping cover so that the limit slots on it fit together with the limit screw to complete the docking, and then the clamping cover is fixedly connected to the pump body end cover with the fixing bolts to complete the fitting of the dynamic ring and the static ring surface. When the gap between the dynamic ring and the static ring becomes larger and needs to be adjusted, the limit screw installed by the thread on the clamping cover is rotated to move the limit screw, thereby pushing the static ring closer to the dynamic ring and reducing the gap between them. There is no need for staff to open the pump casing and the sealing structure to adjust the gap between the static ring and the dynamic ring, which reduces the maintenance workload. The static ring can also be pushed out of the static ring holder on the clamping cover through the limit screw, avoiding the problem that the static ring is pressed tightly against the clamping cover for a long time and the staff needs to use tools to remove it, thereby facilitating the replacement of parts.

[0006] In a further embodiment, a card insert is installed on the spring seat, and a card slot is provided on the dynamic ring. The card insert fits in the card slot, and the assembly of the dynamic ring is completed by fitting the card insert installed on the spring seat into the card slot provided on the dynamic ring.

[0007] In a further embodiment, a static ring sealing ring is installed on the static ring, and the number of the static ring sealing rings is set to two, and a dynamic ring sealing ring is installed on the dynamic ring, which improves the sealing between the various components and avoids liquid leakage.

[0008] In a further embodiment, the shaft sleeve is sleeved on the outside of the double-suction pump shaft, and shaft end sealing rings are installed on the inner ring walls at both ends of the shaft sleeve.

[0009] In a further embodiment, a locking piece is provided on the positioning seat, and a pressing cover sealing ring is installed on the pressing cover. The positioning seat is fixed to the shaft sleeve through the locking piece. The locking piece is an existing known technology and will not be explained here.

[0010] In a further embodiment, the clamping cover is provided with fixing bolts, and the clamping cover is connected to the pump body end cover through the fixing bolts. The fixing bolts cooperate to fix the clamping cover and the pump body end cover to complete the fitting of the dynamic ring and the static ring surface.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. There is no need for staff to open the pump casing and sealing structure to adjust the gap between the static ring and the dynamic ring, which reduces the maintenance workload.

[0013] 2. Avoid the problem that the static ring is pressed against the compression cover for a long time and the staff needs to use tools to remove it, which facilitates the replacement of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a front view structural diagram of the utility model;

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 4 It is an enlarged schematic diagram of the limiting structure of the utility model.

[0018] In the figure: 1. Bushing; 2. Shaft end sealing ring; 3. Positioning seat; 4. Spring; 5. Spring seat; 6. Dynamic ring; 7. Dynamic ring sealing ring; 8. Pressure cover; 9. Static ring; 10. Static ring sealing ring; 11. Limit screw; 12. Fixing bolt; 13. Pressure cover sealing ring; 14. Card insert; 15. Card slot; 16. Static ring holder; 17. Limit slot; 18. Locking piece. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figure 1-4The utility model provides an embodiment of a double-suction pump sewage mechanical seal structure, comprising a sleeve 1, a positioning seat 3, a spring seat 5, a dynamic ring 6, a pressing cover 8, a static ring 9 and a limiting screw rod 11. The sleeve 1 is equipped with a positioning seat 3, a spring 4 is installed on the positioning seat 3, the other end of the spring 4 is connected to the spring seat 5, and the dynamic ring 6 is installed on the spring seat 5. The static ring clamp 16 is provided on the pressing cover 8, and the static ring clamp 16 is placed in the static ring clamp 16. The limiting screw rod 11 is threadedly installed on the pressing cover 8, and a limiting groove 17 is provided on the static ring 9. The limiting groove 17 is slidably connected with the limiting screw rod 11. The sleeve 1 is put on the outside of the double-suction pump shaft, and the positioning seat 3 is fixed to the sleeve 1 by a locking piece 18. Then the spring 4 is put on so that the two ends of the spring 4 are respectively against the annular cavities provided on the positioning seat 3 and the spring seat 5, and the dynamic ring 6 is connected by the card plug 14 installed on the spring seat 5. The static ring 9 can also be pushed out from the static ring holder 16 on the pressing cover 8 through the limiting screw 11, avoiding the problem that the static ring is pressed tightly against the pressing cover for a long time and needs to be removed by the staff using tools, thereby facilitating the replacement of parts.

[0021] See also Figure 1-4 The spring seat 5 is provided with a card insert 14, and the dynamic ring 6 is provided with a card slot 15. The card insert 14 is matched with the card slot 15. The assembly of the dynamic ring 6 is completed by matching the card insert 14 installed on the spring seat 5 with the card slot 15 provided on the dynamic ring 6. The static ring 9 is provided with a static ring sealing ring 10. There are two static ring sealing rings 10. The dynamic ring 6 is provided with a dynamic ring sealing ring 7, which improves the sealing between the various components and prevents liquid leakage.

[0022] See also Figure 1-4The shaft sleeve 1 is sleeved on the outside of the double-suction pump shaft, and the inner ring walls at both ends of the shaft sleeve 1 are installed with shaft end sealing rings 2. The positioning seat 3 is provided with a locking piece 18, and the clamping cover 8 is installed with a clamping cover sealing ring 13. The positioning seat 3 is fixed to the shaft sleeve 1 through the locking piece 18. The locking piece 18 is an existing known technology and is no longer explained here. The clamping cover 8 is provided with a fixing bolt 12, and the clamping cover 8 is connected to the pump body end cover through the fixing bolt 12. The fixing bolt 12 is used to fix the clamping cover 8 to the pump body end cover to complete the fitting of the dynamic ring 6 and the static ring 9.

[0023] Working principle: Put the sleeve 1 on the outside of the double-suction pump shaft, and then fix the positioning seat 3 to the sleeve 1 through the locking piece 18, and then put on the spring 4, so that the two ends of the spring 4 are respectively against the annular cavity set on the positioning seat 3 and the spring seat 5, and the card plug 14 installed on the spring seat 5 is matched with the card slot 15 opened on the dynamic ring 6 to complete the assembly of the dynamic ring 6, and place the static ring 9 into the static ring card seat 16 set on the clamping cover 8, so that the limiting groove 17 opened on it is matched with the limiting screw rod 11 to complete the docking, and then cooperate with the fixing bolts 12 to fix the clamping cover 8 and the pump body end cover to complete the fitting of the dynamic ring 6 and the static ring 9 surface, through the two static ring sealing rings 10 installed on the static ring 9 and the dynamic ring sealing ring 7 installed on the dynamic ring 6, As well as the shaft end sealing ring 2 and the clamping cover sealing ring 13 arranged on the inner ring walls at both ends of the sleeve 1, the sealing performance between the various components is improved. When the gap between the dynamic ring 6 and the static ring 9 becomes larger and needs to be adjusted, the limiting screw 11 threadedly installed on the clamping cover 8 is rotated to move the limiting screw 11, thereby pushing the static ring 9 toward the dynamic ring 6 to reduce the gap between them. There is no need for staff to open the pump casing and the sealing structure to adjust the gap between the static ring and the dynamic ring, which reduces the maintenance workload. The static ring 9 can also be pushed out of the static ring holder 16 on the clamping cover 8 through the limiting screw 11, avoiding the problem that the static ring is pressed tightly against the clamping cover for a long time and requires staff to use tools to remove it, thereby facilitating the replacement of parts.

[0024] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A double-suction pump sewage mechanical seal structure, comprising a shaft sleeve (1), a positioning seat (3), a spring seat (5), a dynamic ring (6), a pressing cover (8), a static ring (9) and a limiting screw (11), characterized in that: A positioning seat (3) is installed on the shaft sleeve (1), a spring (4) is installed on the positioning seat (3), the other end of the spring (4) is connected to the spring seat (5), a dynamic ring (6) is installed on the spring seat (5), a static ring holder (16) is provided on the clamping cover (8), a static ring (9) is placed in the static ring holder (16), a limiting screw rod (11) is threadedly installed on the clamping cover (8), a limiting groove (17) is provided on the static ring (9), and the limiting groove (17) is slidably connected to the limiting screw rod (11).

2. A double-suction pump sewage mechanical seal structure according to claim 1, characterized in that: A card insert (14) is installed on the spring seat (5), a card slot (15) is provided on the movable ring (6), and the card insert (14) is fitted into the card slot (15).

3. A double-suction pump sewage mechanical seal structure according to claim 1, characterized in that: A static ring sealing ring (10) is installed on the static ring (9), and the number of the static ring sealing rings (10) is set to two. A dynamic ring sealing ring (7) is installed on the dynamic ring (6).

4. A double-suction pump sewage mechanical seal structure according to claim 1, characterized in that: The shaft sleeve (1) is sleeved on the outside of the double-suction pump shaft, and shaft end sealing rings (2) are installed on the inner ring walls at both ends of the shaft sleeve (1).

5. The double-suction pump sewage mechanical seal structure according to claim 1, characterized in that: A locking piece (18) is provided on the positioning seat (3), and a pressing cover sealing ring (13) is installed on the pressing cover (8).

6. A double-suction pump sewage mechanical seal structure according to claim 1, characterized in that: The compression cover (8) is provided with a fixing bolt (12), and the compression cover (8) is connected to the pump body end cover via the fixing bolt (12).

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