CN205744570U - A kind of power depuration structure of wet type electric motor pump sliding bearing cooling circulation liquid - Google Patents

Abstract

The utility model belongs to the field of fluid machinery, and relates to a power filtering structure for the cooling circulating fluid of a wet motor pump sliding bearing, which comprises a cone cylinder, a first channel, a second channel, a rotary vane and a third channel; the first channel is opened in Inside the sliding bearing end cover, the second passage is opened at the joint between the conical cylinder and the sliding bearing end cover, the third passage is opened between the axial wall of the conical cylinder close to the sliding bearing and the shaft, and the rotating vane is fixedly installed On the second shaft sleeve; the utility model increases the pressure of the cooling circulation circuit of the sliding bearing of the wet motor pump, which provides greater power for the cooling circulation channel of the motor; Under the circumstances, this structure can ensure that the cooling circuit of the wet motor has sufficient cooling and cleaning medium, and at the same time reduces the wear of the sliding bearing, prolongs the service life of the sliding bearing, improves the operation reliability of the pump unit, and reduces the maintenance cost.

Description

A dynamic filter structure for cooling circulating fluid of sliding bearings in wet motor pumps

technical field

The utility model belongs to the field of fluid machinery research, in particular to a dynamic filter structure for cooling circulating fluid of sliding bearings of wet motor pumps.

Background technique

Based on the rapid emergency pump for mine permeable water, the pump impeller is directly driven by a variable-frequency speed-up wet motor. The pump rotor rotates under the support of sliding bearings, and the internal circulation cooling circuit is one of the key technologies of the wet motor pump unit. During the operation of the pump unit, due to the wear of the internal sliding bearing and its grinding parts and the impurities in the circulating liquid itself, the existing cooling circuit method cannot remove the impurities in the liquid. These impurities will cause the sliding bearing to wear faster and affect the sliding The service life of the bearing. On the other hand, when the existing wet motor pump is running, the gap between the thrust plate and the thrust bearing bush is small, and the pressure loss is large, which cannot provide sufficient cooling medium power for the subsequent circuit, which affects the heat dissipation effect of the wet motor pump.

Utility model content

The purpose of this utility model is to provide a dynamic filtration structure for the cooling circulation fluid of the sliding bearing of the wet motor pump in view of the above problems, improve the cooling circulation flow in the sealing chamber of the existing wet motor pump, remove the solid particle impurities in the liquid, and solve the cooling problem. Medium impurities are easy to wear and tear the sliding bearings, which improves the operating life of the pump.

The technical solution of the utility model is: a dynamic filtering structure for the cooling circulating fluid of the sliding bearing of the wet motor pump, including a cone cylinder, a first channel, a second channel and a third channel;

The conical cylinder is installed in the sealing cavity, and the sealing cavity is surrounded by the sliding bearing end cover, the thrust plate, the bracket, the first bushing, the second bushing and the sliding bearing; the part of the conical cylinder close to the sliding bearing is Cylindrical, the part close to the thrust plate is conical; the cylindrical part of the conical cylinder is detachably connected to the end cover of the sliding bearing end close to the shaft, and the conical part of the conical cylinder is detachable from the first bushing connect;

The first channel is set inside the sliding bearing end cover; the second channel is opened at the joint between the conical cylinder and the sliding bearing end cover; one end opening of the first channel is connected to the end of the sliding bearing end cover near the thrust plate, and the other One end opening communicates with the conical cylinder through the second passage; the third passage is opened between the axial wall of the conical cylinder close to the sliding bearing and the shaft.

In the above solution, the conical cylinder is further provided with a rotary vane; the rotary vane is fixedly installed on the second shaft sleeve.

Further, the position of the rotating vane is directly opposite to the outlet of the second channel.

In the above scheme, a radial through hole is opened near the thrust disc in the first bushing, and an axial hole is opened near the end of the thrust disc, and the axial hole communicates with the radial through hole; the thrust disc is connected to the axial hole An axial channel communicating with the cavity C is opened at the same axis position, and the axial hole communicates with the axial channel.

In the above scheme, auxiliary sealing is also included;

The auxiliary seal is arranged at one end of the conical cylinder close to the thrust plate, the static ring of the auxiliary seal is fixedly connected with the conical cylinder through positioning pins, and the movable ring of the auxiliary seal is connected with the first shaft sleeve.

In the above solution, the cylindrical part of the conical cylinder is connected to the end cover of the sliding bearing close to the shaft by bolts, and gaskets are also set on the bolts.

The beneficial effects of the utility model are: compared with the prior art, when the utility model is working in the wet motor pump, after adopting the power filter structure described in the utility model, the pressure of the cooling circulation circuit of the sliding bearing of the wet motor pump is increased, and the motor The cooling circulation channel provides greater power; the impurities in the cooling medium are filtered, and in the working state of the wet motor pump, this structure can ensure that the cooling circulation circuit for the heat dissipation of the wet motor has sufficient cooling and cleaning medium, and at the same time reduces slippage The wear of the bearing prolongs the service life of the sliding bearing, improves the operation reliability of the pump unit, and reduces the maintenance cost.

Description of drawings

Fig. 1 is a schematic diagram of a dynamic filtering structure of a sliding bearing cooling circulating fluid according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of the existing sliding bearing structure of the wet motor pump.

In the figure: 1. Axial channel; 2. Thrust plate; 3. Thrust bearing; 4. Axial hole; 5. Bracket; 6. Auxiliary seal; 7. Locating pin; 8. Radial through hole; 9. Key; 10. Bolt; 11. Gasket; 12. Motor barrel; 13. First channel; 14. Conical barrel; 15. First shaft sleeve; 16. Second channel; 17. Rotary vane; 18. Second shaft sleeve ; 19, the third channel; 20, the sliding bearing cover; 21, the sliding bearing gland; 22, the sliding bearing; 23, the shaft; 24, the sealing cavity; 25, the C cavity.

detailed description

In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation of the utility model is now described with reference to the accompanying drawings, and the same symbols in each figure represent the same or similar parts. The accompanying drawings are only used to illustrate the utility model, and do not represent the actual structure and true scale of the utility model.

Fig. 1 shows an embodiment of the dynamic filtering structure of the sliding bearing cooling circulating fluid of the wet motor pump according to the utility model. The dynamic filtering structure of the cooling circulating fluid of the sliding bearing of the wet motor pump comprises a conical cylinder 14, A first channel 13 , a second channel 16 , a rotary vane 17 and a third channel 19 .

The conical cylinder 14 is installed in the sealing cavity 24, and the sealing cavity 24 is surrounded by the sliding bearing end cover 20, the thrust plate 2, the bracket 5, the first bushing 15, the second bushing 18 and the sliding bearing 22; The part of the conical cylinder 14 close to the sliding bearing 22 is cylindrical, and the part close to the thrust plate 2 is conical; the end of the sliding bearing end cover 20 axially close to the shaft 23 is the bottom end of the sliding bearing end cover 20, and the conical The cylindrical part of the cylinder 14 is detachably fixed on the bottom end of the sliding bearing end cover 20 by bolts 10 , and a washer 11 is set on the bolts 10 . The end of the conical cylinder 14 close to the bracket 5 is the bottom end of the conical cylinder 14 ; the conical part of the conical cylinder 14 is detachably connected with the first bushing 15 . The first channel 13 is opened inside the sliding bearing end cover 20; the second channel 16 is opened at the junction of the conical cylinder 14 and the sliding bearing end cover 20; one end opening of the first channel 13 communicates with the sliding bearing end cover 20 One end is close to the thrust plate 2 , and the other end is open to communicate with the conical cylinder 14 through the second passage 16 ; the third passage 19 is opened between the axial wall of the conical cylinder 14 near the sliding bearing 22 and the shaft 23 .

The thrust plate 2 is connected to the shaft 23 through the key 9, and rotates together with the shaft 23. The sliding bearing end cover 20 is connected with the motor frame through fasteners, and an inclined first opening is opened inside the sliding bearing end cover 20. Channel 13, through which the cooling medium is introduced into the conical cylinder 14, through the dynamic filtering structure of the sliding bearing cooling circulating fluid, that is, the liquid thrown out from the radial through hole inside the thrust plate 2 will flow into the sliding bearing end cover The first channel 13 inside 20 enters the conical cylinder 14 through the second channel 16 and flows out through the third through hole 19 .

The conical cylinder 14 is also provided with a rotary vane 17 ; the rotary vane 17 is fixedly mounted on the second bushing 18 at an end away from the thrust disc 2 and facing the exit of the second channel 16 . The rotating vanes 17 accelerate the rotation of the liquid flowing into the conical cylinder 14 .

The first shaft sleeve 15 has a radial through hole 8 close to the thrust disc 2, and an axial hole 4 is opened near the end of the thrust disc 2, and the axial hole 4 communicates with the radial through hole 8; the thrust disc 2 and The above-mentioned axial hole 4 opens an axial channel 1 communicating with the C cavity 25 at the same axis position, and the axial hole 4 communicates with the axial channel 1. When installing, ensure that the axes of the axial hole 4 and the axial channel 1 are consistent.

The junction of the conical part of the conical cylinder 14 and the first shaft sleeve 15 is provided with an auxiliary seal 6, the auxiliary seal 6 is arranged at one end of the conical cylinder 14 close to the thrust plate 2, the static ring of the auxiliary seal 6 and the conical cylinder 14 is fixedly connected by the positioning pin 7, and the moving ring of the auxiliary seal 6 is connected with the first shaft sleeve 15, so that solid particles accumulate and flow out.

When the wet motor pump rotates, the shaft 23 rotates, and the torque transmitted through the key 9 drives the thrust plate 2 to rotate. After the liquid flows through the radial through hole of the thrust plate 2, part of the liquid flows out through the gap between the thrust plate 2 and the thrust bearing bush 3, but most of the liquid flows out. It enters the first channel 13 inside the sliding bearing end cover 20, and then flows into the inside of the conical cylinder 14 through the second channel 16. Since the rotary vane 17 rotates with the shaft 23, after the impurity-containing liquid enters the conical cylinder 14, it is strongly rotated by the rotating rotary vane 17, and the liquid flows spirally along the cylinder to the bottom of the conical cylinder 14, and the solid particles with high density Under the action of centrifugal force, it is thrown towards the wall of the conical cylinder 14, and under the action of gravity, it flows down the wall of the conical cylinder 14 to the radial through hole 8 and the axial hole opened by the second bushing 18 close to the thrust disc 2. 4, through the inner axial channel 1 of the thrust disc 2, it flows back into the C cavity 25 with lower pressure. The purified cleaning liquid makes a spiral movement from bottom to top in the conical cylinder 14 , and shrinks to flow toward the center, and finally flows out through the third channel 19 to lubricate the sliding bearing 22 .

Figure 2 shows the schematic diagram of the existing sliding bearing structure of the wet motor pump. When the existing wet motor pump is running, the gap between the thrust plate and the thrust bearing bush is small, and the pressure loss is large, which cannot provide sufficient cooling medium power for the subsequent circuit, which affects the wet pump. Motor pump cooling effect. Compared with the prior art shown in Figure 2, the utility model opens the first channel 13 inside the sliding bearing end cover 20, and the sliding bearing end cover 20, the thrust plate 2, the bracket 5, the first shaft sleeve 15, the second shaft A conical cylinder 14 is placed in the sealing cavity 24 surrounded by the sleeve 18 and the sliding bearing 22. The bottom of the conical cylinder 14 is provided with an auxiliary seal 6, and the second shaft sleeve 18 is provided with a rotary vane 17 to remove impurities and reduce the wear of the sliding bearing. , and increased the wet motor pump sliding bearing cooling cycle circuit pressure.

It should be understood that although this description is described according to various embodiments, not each embodiment only includes an independent technical solution, and this description of the description is only for clarity, and those skilled in the art should take the description as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

A series of detailed descriptions listed above are only specific descriptions for the feasible embodiments of the present utility model, and they are not intended to limit the scope of protection of the present utility model. Embodiments or changes should be included within the protection scope of the present utility model.

Claims (6)

1. the power depuration structure of a wet type electric motor pump sliding bearing cooling circulation liquid, it is characterised in that include taper cone barrel (14), first passage (13), second channel (16) and third channel (19)；

Described taper cone barrel (14) is arranged in annular seal space (24), and described annular seal space (24) is by sliding bearing end cap (20), thrust disc (2), support (5), the first axle sleeve (15), the second axle sleeve (18) and sliding bearing (22) surround；Described taper cone barrel (14) is near sliding The part of dynamic bearing (22) is cylindrical shape, and the part near thrust disc (2) is cone；Described taper cone barrel (14) columnar portion Point removably connect near one end of axle (23) with sliding bearing end cap (20), the conical part of described taper cone barrel (14) and the One axle sleeve (15) removably connects；

Described first passage (13) is opened in the inside of sliding bearing end cap (20)；Second channel (16) be opened in taper cone barrel (14) with The junction of sliding bearing end cap (20)；One end open connection sliding bearing end cap (20) of described first passage (13) is from thrust The nearly one end of dish (2), other end opening is connected with described taper cone barrel (14) by second channel (16)；Described third channel (19) is opened At taper cone barrel (14) axially adjacent between wall and the axle (23) of sliding bearing (22).

The power depuration structure of wet type electric motor pump sliding bearing cooling circulation liquid the most according to claim 1, its feature exists In, described taper cone barrel (14) is additionally provided with vane (17)；Described vane (17) is fixedly mounted on described second axle sleeve (18).

The power depuration structure of wet type electric motor pump sliding bearing cooling circulation liquid the most according to claim 2, its feature exists In, the position of described vane (17) faces the outlet of second channel (16).

The power depuration structure of wet type electric motor pump sliding bearing cooling circulation liquid the most according to claim 1, its feature exists In, described first axle sleeve (15) opens a radial direction through hole (8) near thrust disc (2) place, opens an axial hole near thrust disc (2) end (4), axial hole (4) communicate with radial direction through hole (8)；Described thrust disc (2) and above-mentioned axial hole (4) same axial location are opened and C The axial passage (1) that chamber (25) communicates, axial hole (4) communicate with axial passage (1).

The power depuration structure of wet type electric motor pump sliding bearing cooling circulation liquid the most according to claim 1, its feature exists In, also include auxiliary seal (6)；

Described auxiliary seal (6) is arranged on taper cone barrel (14) one end near thrust disc (2), the stationary ring of auxiliary seal (6) and circle Cone cylinder (14) connects by alignment pin (7) is fixing, and the rotating ring of auxiliary seal (6) and the first axle sleeve (15) connect.

The power depuration structure of wet type electric motor pump sliding bearing cooling circulation liquid the most according to claim 1, its feature exists In, described taper cone barrel (14) columnar part is with sliding bearing end cap (20) near one end of axle (23) by bolt (10) even Connect.