CN220667900U

CN220667900U - Self-sealing shaft seal assembly device of centrifugal pump

Info

Publication number: CN220667900U
Application number: CN202322239820.3U
Authority: CN
Inventors: 黄钧
Original assignee: TAIZHOU KANGQIAO ELECTROMECHANICAL EQUIPMENT CO Ltd
Current assignee: TAIZHOU KANGQIAO ELECTROMECHANICAL EQUIPMENT CO Ltd
Priority date: 2023-08-19
Filing date: 2023-08-19
Publication date: 2024-03-26
Anticipated expiration: 2033-08-19

Abstract

The utility model discloses a self-sealing shaft seal assembly device of a centrifugal pump, which relates to the field of water supply and drainage equipment and aims to solve the problem that local heat concentration is damaged due to rapid temperature rise caused by lack of lubrication of a rubber ring under high-speed rotation.

Description

Self-sealing shaft seal assembly device of centrifugal pump

Technical Field

The utility model relates to the technical field of water supply and drainage equipment, in particular to a self-sealing shaft seal assembly device of a centrifugal pump.

Background

Centrifugal pumps are a common type of power mechanical device for transporting liquid from a low pressure region to a high pressure region by centrifugal force. It generally consists of a rotating impeller and a stationary housing. When the impeller of the pump rotates, centrifugal force can be generated, liquid is sucked in from the inlet and pushed to the outlet with corresponding pressure and speed, so that the requirement of liquid transmission in the pipeline is met. The centrifugal pump is widely applied to the fields of industry, construction, agriculture and the like, and is commonly used for water treatment, water supply, pressurization, heat dissipation, air conditioning, fire protection systems and the like

The gap between the rotating shaft and the centrifugal pump body is filled with a rubber sealing ring in the existing centrifugal pump shaft sealing mode, the rubber sealing ring is clamped and fixedly arranged, and lubricating oil is added regularly.

The prior art solutions described above have the following drawbacks: this sealing means needs to add lubricating oil repeatedly, and it is too much to cause lubricating oil loss when centrifugal pump frequency of use is too high, and the rubber ring lacks lubrication under high-speed rotation and can rise rapidly and cause local heat to concentrate, and light then accelerates the rubber ring ageing, and heavy then directly burns out the rubber ring, and is very big to the steady operation harm of centrifugal pump.

Disclosure of Invention

The utility model aims to provide a self-sealing shaft seal assembly device of a centrifugal pump.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

including the centrifugal pump body, the centrifugal pump body runs through inside block and installs drainage impeller, the centrifugal pump body runs through and is provided with the axis of rotation that rotates the connection, drainage impeller block is installed in the axis of rotation, the axis hole that supplies the axis of rotation to pass is seted up to the centrifugal pump body, the fixed bearing cartridge that is provided with the lid in axis hole of rotation of centrifugal pump body outer wall, the bearing cartridge is inside to be provided with sufficient bearing oil, the bearing cartridge is kept away from the one side of centrifugal pump body and is run through and set up the first trompil that supplies the axis of rotation to rotate out, the axis of rotation outer wall rotates the cover and is equipped with first rubber seal ring, first rubber seal ring sets up the gap setting between lid in pairs respectively in axis hole, first trompil and the axis of rotation, the fixed supercharging device who is provided with the inside cavity of intercommunication of bearing cartridge outer wall.

Through adopting above-mentioned technical scheme, adopt pressurizing device to pressurize the bearing seal box inside, tightly press the clothes to first rubber seal ring, make its abundant lid close the shaft hole, gap between first trompil and the axis of rotation, when preventing that liquid entering bearing seal box in the centrifugal pump body from revealing, can also prevent that bearing seal oil from revealing, the axis of rotation is at the rotation in-process, owing to be that rubber material bearing seal oil can infiltrate first rubber seal ring through the osmotic effect, make constantly keep high-pressure laminating and lubricated state of fluid between first rubber seal ring and the axis of rotation, prevent that first rubber seal ring from rising the temperature because of lacking lubricating fluid and the high-speed friction of axis of rotation, the effect of long-term protection first rubber seal ring improve equipment stability in use has been played.

Further, the first trompil of one side lid that the centrifugal pump body was kept away from to the bearing seal box is provided with vice seal box, vice seal box inside is provided with the bearing seal oil of abundant, the one side that the bearing seal box was kept away from to vice seal box runs through and has offered the second trompil that supplies the axis of rotation to rotate out, axis of rotation outer wall rotation cover is equipped with the second rubber seal ring, the second rubber seal ring sets up the gap setting between first trompil, second trompil and the axis of rotation respectively in pairs, vice seal box matches and is provided with pressurizing device.

Through adopting above-mentioned technical scheme, set up vice seal box and carry out further pressurization to the centrifugal pump body and seal, under the extreme condition that the bearing seal box became invalid, vice seal box can also play good sealed effect, plays the insurance effect, and the axis of rotation of secondary bearing seal is revealed the possibility less, uses safelyr.

Further, the pressurizing device comprises a pressurizing cylinder, the pressurizing cylinder is fixedly arranged on the outer wall of the shaft seal box in a communicated mode, one end, far away from the shaft seal box or the auxiliary sealing box, of the pressurizing cylinder is slidably connected with a pressurizing column, a hexagonal bolt hole is formed in the outer wall, far away from the shaft seal box or the auxiliary sealing box, of the pressurizing column, the pressurizing cylinder is in threaded fit connection with the pressurizing cylinder, and one end, close to the pressurizing cylinder, of the pressurizing column is provided with a rubber pressurizing plug in an extending mode, and the rubber pressurizing plug is tightly attached to the inner wall of the pressurizing cylinder.

Through adopting above-mentioned technical scheme, use spanner embedding hex bolts hole, alright light screw up the pressure post, can follow the pressure section of thick bamboo length direction motion when the pressure post of screw thread succession rotates, the pressure post is towards bearing seal box or vice sealed box direction removal formula, and rubber pressurization match can be promoted by the synchronization, compresses the bearing seal oil of bearing seal box or vice sealed box inside, guarantees to apply sufficient pressure to first rubber seal box second rubber seal and makes it tightly seal the gap.

Further, the outer edge of the rubber pressurizing plug is circumferentially provided with a plurality of rubber sealing rings.

Through adopting above-mentioned technical scheme, the rubber seal ring is finer, and elastic deformation takes place more easily and further fills the gap of rubber pressurization stopper and pressurization section of thick bamboo inner wall, improves the holistic leakproofness of rubber pressurization stopper, guarantees the pressurization effect.

Further, the outer wall of the pressurizing cylinder is communicated with an oil adding cylinder, a plurality of one-way valves are cut off by the joint inner wall of the oil adding cylinder, and an oil adding hopper is communicated with one end of the oil adding cylinder, which is far away from the pressurizing cylinder.

Through adopting above-mentioned technical scheme, twist during the use and press the post and reduce shaft seal box or vice sealed box internal pressure, add sufficient shaft seal oil to the inside interpolation oil fill, shaft seal oil flows into low shaft seal box or vice sealed box inside through the check valve and successfully adds fluid, and the setting of check valve still can effectively avoid shaft seal oil backward flow to go into in the interpolation oil fill under the prerequisite that does not hinder shaft seal oil filling.

Further, the check valve comprises a loose-leaf plate, the loose-leaf plate cuts the setting of adding the oil cylinder, the loose-leaf plate rotates to set up in adding the oil cylinder inner wall, it is fixedly provided with limiting plate to add the oil cylinder inner wall, the limiting plate sets up in the loose-leaf plate one side of keeping away from adding the oil cylinder, the one side that the loose-leaf plate is close to the limiting plate extends and is provided with the rubber sealing strip, the sealing groove sealed by supplying the rubber sealing strip gomphosis is seted up to the limiting plate.

Through adopting above-mentioned technical scheme, when shaft seal oil flows in, automatic jack-up loose-leaf plate leaves the gap that the size is sufficient under the liquid pressure effect and makes things convenient for the interpolation of shaft seal oil, when the inside pressurization of shaft seal box or vice seal box, loose-leaf plate closely laminating limiting plate under inside pressure effect, and the check valve is in the state of tight closure seal, effectively avoids the backward flow and the revealing of inside fluid, and rubber seal strip combines the seal groove, makes loose-leaf plate and limiting plate seal inseparabler.

In summary, the beneficial technical effects of the utility model are as follows:

1. the shaft seal box, the shaft seal oil, the first rubber sealing ring and the pressurizing device are adopted, so that the effect of preventing the first rubber sealing ring from rising temperature due to the lack of high-speed friction between lubricating oil liquid and the rotating shaft is achieved, and the effect of protecting the first rubber sealing ring for a long time and improving the use stability of equipment is achieved;

2. the pressurizing cylinder, the pressurizing column and the rubber pressurizing plug are adopted, so that the shaft seal oil in the shaft seal box or the auxiliary seal box is contracted, and the effect of applying enough pressure to the second rubber sealing ring of the first rubber sealing ring box to tightly seal the gap is ensured;

3. the check valve is adopted, so that the effect that the shaft seal oil flows back into the oil adding hopper can be effectively avoided on the premise that the shaft seal oil filling is not hindered.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a schematic view of the overall cross-sectional structure of the present utility model;

FIG. 3 is an enlarged schematic view of the structure of portion B in FIG. 2;

FIG. 4 is a schematic view of the overall cross-sectional structure of the present utility model;

FIG. 5 is an enlarged schematic view of the structure of portion A in FIG. 4;

fig. 6 is a schematic view of the structure of the check valve in the present utility model.

In the figure, 1, a centrifugal pump body; 2. a rotating shaft; 3. a shaft seal box; 31. a first opening; 32. a first rubber seal ring; 4. an auxiliary sealing box; 41. a second opening; 42. a second rubber seal ring; 5. a pressurizing device; 51. a pressurizing cylinder; 52. pressurizing the column; 53. a rubber pressurizing plug; 54. a rubber seal ring; 6. an oil adding cylinder; 61. adding an oil hopper; 7. a one-way valve; 71. a loose-leaf plate; 72. a limiting plate; 73. a rubber sealing strip; 74. and (5) sealing the groove.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings.

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-6, the present utility model provides the following technical solutions:

comprises a centrifugal pump body 1, a drainage impeller is installed by penetrating through the centrifugal pump body 1, the centrifugal pump body 1 penetrates through a rotating shaft 2 which is rotatably connected, the drainage impeller is installed on the rotating shaft 2 by being clamped, a shaft hole for the rotating shaft 2 to penetrate through is formed in the centrifugal pump body 1, a shaft seal box 3 for covering the shaft hole is fixedly arranged on the outer wall of the centrifugal pump body 1, enough shaft seal oil is arranged in the shaft seal box 3, a first opening hole 31 for the rotating shaft 2 to penetrate through is formed in one surface of the shaft seal box 3 far away from the centrifugal pump body 1 in a penetrating way, a first rubber sealing ring 32 is sleeved on the outer wall of the rotating shaft 2 in a rotating way, the first rubber sealing rings 32 are arranged in pairs to respectively cover the shaft hole, the first opening hole 31 and the gap between the rotating shaft 2 are arranged, a pressurizing device 5 for communicating an internal cavity is fixedly arranged on the outer wall of the shaft seal box 3, the pressurizing device 5 is used for pressurizing the interior of the shaft seal box 3, the first rubber sealing ring 32 is tightly pressed to fully cover the gap between the shaft hole, the first opening hole 31 and the rotating shaft 2, so that the leakage of liquid in the centrifugal pump body 1 into the shaft seal box 3 can be prevented, the leakage of shaft seal oil can be prevented, in the rotating process of the rotating shaft 2, as the rubber material shaft seal oil can infiltrate the first rubber sealing ring 32 through the osmosis, the first rubber sealing ring 32 and the rotating shaft 2 can keep the state of high-pressure bonding and oil lubrication at all times, the first rubber sealing ring 32 is prevented from heating up due to the lack of high-speed friction of lubricating oil and the rotating shaft 2, the effect of long-term protection of the first rubber sealing ring 32 for improving the use stability of equipment is achieved, one surface of the shaft seal box 3, far away from the centrifugal pump body 1, covers the first opening hole 31, is provided with the auxiliary sealing box 4, the inside of the auxiliary sealing box 4 is provided with sufficient shaft seal oil, the side of the auxiliary sealing box 4 far away from the shaft seal box 3 is penetrated and provided with a second opening 41 through which the rotating shaft 2 penetrates, the outer wall of the rotating shaft 2 is rotationally sleeved with a second rubber sealing ring 42, the second rubber sealing rings 42 are arranged in pairs and are respectively arranged in gaps between the first opening 31, the second opening 41 and the rotating shaft 2, the auxiliary sealing box 4 is matched and provided with a pressurizing device 5, the auxiliary sealing box 4 is arranged to further pressurize and seal the centrifugal pump body 1, under the extreme condition that the shaft seal box 3 fails, the auxiliary sealing box 4 can also play a good sealing role to play a role in safety, the possibility of leakage of the rotating shaft 2 of the secondary shaft seal is smaller, the use is safer, the pressurizing device 5 comprises a pressurizing cylinder 51, the pressurizing cylinder 51 is fixedly arranged on the outer wall of the shaft seal box 3 in a communicating way, one end of the pressurizing cylinder 51 far away from the shaft seal box 3 or the auxiliary sealing box 4 is slidingly connected and provided with a pressurizing column 52, the outer wall of one end of the pressurizing column 52 far away from the shaft seal box 3 or the auxiliary sealing box 4 is provided with a hexagonal bolt hole, the pressurizing column 52 is in threaded fit with the pressurizing cylinder 51, one end of the pressurizing column 52 close to the pressurizing cylinder 51 is extended to be provided with a rubber pressurizing plug 53 closely attached to the inner wall of the pressurizing cylinder 51, the pressurizing column 52 can be easily screwed by using a spanner to embed the hexagonal bolt hole, the threaded pressurizing column 52 moves along the length direction of the pressurizing cylinder 51 when rotating, the pressurizing column 52 moves towards the shaft seal box 3 or the auxiliary sealing box 4, the rubber pressurizing plug can be synchronously pushed to compress the shaft seal oil in the shaft seal box 3 or the auxiliary sealing box 4, the sufficient pressure is applied to the second rubber sealing ring 42 of the first rubber sealing ring 32 to tightly seal the gap, the outer edge of the rubber pressurizing plug 53 is circumferentially provided with a plurality of rubber sealing rings 54, the rubber sealing rings 54 are finer, the gap between the rubber pressurizing plug 53 and the inner wall of the pressurizing cylinder 51 is more easily elastically deformed and further filled, the sealing performance of the whole rubber pressurizing plug 53 is improved, the pressurizing effect is guaranteed, the outer wall of the pressurizing cylinder 51 is communicated with the oil adding cylinder 6, the inner wall of the oil adding cylinder 6 is attached to be cut off, a plurality of check valves 7 are arranged, one end of the oil adding cylinder 6, which is far away from the pressurizing cylinder 51, is communicated with the oil adding hopper 61, the pressurizing column 52 is screwed to reduce the internal pressure of the shaft seal box 3 or the auxiliary sealing box 4 during use, sufficient shaft seal oil is added into the low shaft seal box 3 or the auxiliary sealing box 4 through the check valves 7, oil is successfully added into the low shaft seal box 3 or the auxiliary sealing box 4, the check valves 7 are arranged on the premise of not obstructing oil filling, the shaft seal oil is effectively prevented from flowing back into the oil adding hopper 61, the check valves 7 comprise a loose-leaf plate 71, the loose-leaf plate 71 is cut off, the oil adding cylinder 6 is arranged, the loose-leaf plate 71 is rotatably arranged on the inner wall of the oil adding cylinder 6, the inner wall of the oil adding cylinder 6 is fixedly provided with a limit plate 72, the limit plate 72 is arranged on one side of the loose-leaf plate 71, which is far away from the oil adding cylinder 6, one side, the seal plate 71 is close to the limit plate 72 is arranged, when the rubber plate 71 is close to one side of the limit plate 72, and the rubber plate 73 is provided with the seal plate 73, and the seal plate 73 is close to the seal plate is provided with a seal plate 73, and the seal plate is more closely and the seal plate 73 is closely matched with the seal plate and the seal plate is more closely when the seal plate is closely sealed by the seal plate is close seal plate 72.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a centrifugal pump self sealss bearing seal assembly quality, includes centrifugal pump body (1), centrifugal pump body (1) runs through inside block and installs drainage impeller, centrifugal pump body (1) run through and are provided with rotation axis (2) of rotation connection, drainage impeller block is installed in axis of rotation (2), its characterized in that: the centrifugal pump comprises a centrifugal pump body (1), wherein a shaft hole for a rotating shaft (2) to pass through is formed in the centrifugal pump body (1), a shaft seal box (3) for covering the shaft hole is fixedly arranged on the outer wall of the centrifugal pump body (1), sufficient shaft seal oil is arranged inside the shaft seal box (3), a first opening (31) for the rotating shaft (2) to rotate out is formed in the shaft seal box (3) to penetrate through one surface of the centrifugal pump body (1), a first rubber sealing ring (32) is sleeved on the outer wall of the rotating shaft (2) in a rotating mode, gaps between the shaft hole, the first opening (31) and the rotating shaft (2) are formed in pairs in a covering mode, and a pressurizing device (5) for communicating an inner cavity is fixedly arranged on the outer wall of the shaft seal box (3).

2. The self-sealing shaft seal assembly device of a centrifugal pump according to claim 1, wherein: the centrifugal pump comprises a centrifugal pump body (1), and is characterized in that a first opening (31) is covered on one side of the centrifugal pump body (1) away from a shaft seal box (3), an auxiliary sealing box (4) is arranged, sufficient shaft seal oil is arranged inside the auxiliary sealing box (4), a second opening (41) through which a rotating shaft (2) rotates out is formed in a penetrating mode on one side of the auxiliary sealing box (4) away from the shaft seal box (3), a second rubber sealing ring (42) is sleeved on the outer wall of the rotating shaft (2) in a rotating mode, gaps among the first opening (31), the second opening (41) and the rotating shaft (2) are formed in pairs through the second rubber sealing ring (42), and a pressurizing device (5) is arranged in a matched mode on the auxiliary sealing box (4).

3. The self-sealing shaft seal assembly device of a centrifugal pump according to claim 2, wherein: the pressurizing device (5) comprises a pressurizing cylinder (51), the pressurizing cylinder (51) is fixedly arranged on the outer wall of the shaft seal box (3) in a communicated mode, one end, far away from the shaft seal box (3), of the pressurizing cylinder (51) is slidably connected with a pressurizing column (52), a hexagonal bolt hole is formed in the outer wall of one end, far away from the shaft seal box (3), of the pressurizing column (52), the pressurizing cylinder (51) is connected in a threaded mode, one end, close to the pressurizing cylinder (51), of the pressurizing column (52) is extended to be provided with a rubber pressurizing plug (53) closely attached to the inner wall of the pressurizing cylinder (51).

4. A centrifugal pump self-sealing shaft seal assembly device according to claim 3, wherein: the outer edge of the rubber pressurizing plug (53) is circumferentially provided with a plurality of rubber sealing rings (54).

5. The self-sealing shaft seal assembly device for a centrifugal pump according to claim 4, wherein: the oil adding device is characterized in that an oil adding cylinder (6) is arranged on the outer wall of the pressurizing cylinder (51) in a communicating mode, a plurality of one-way valves (7) are arranged on the inner wall of the oil adding cylinder (6) in a truncated mode, and an oil adding hopper (61) is arranged on one end, far away from the pressurizing cylinder (51), of the oil adding cylinder (6) in a communicating mode.

6. The self-sealing shaft seal assembly device for a centrifugal pump according to claim 5, wherein: the one-way valve (7) comprises a loose-leaf plate (71), the loose-leaf plate (71) cuts off the setting of the oil adding cylinder (6), the loose-leaf plate (71) rotates to be arranged on the inner wall of the oil adding cylinder (6), a limiting plate (72) is fixedly arranged on the inner wall of the oil adding cylinder (6), the limiting plate (72) is arranged on one side, far away from the oil adding cylinder (6), of the loose-leaf plate (71), a rubber sealing strip (73) is arranged on one side, close to the limiting plate (72), of the loose-leaf plate (71), and the limiting plate (72) is provided with a sealing groove (74) for the rubber sealing strip (73) to be embedded and sealed.