CN205064347U - A drive bearing structure for starting feed water pump - Google Patents

Abstract

A driving bearing structure for starting a feed water pump. A pump shaft is arranged in the middle of the driving bearing structure. Dust-proof disks are arranged at the left and right ends of the pump shaft. Between the two dust-proof disks, spacers A, A, Oil ring sleeve, cylindrical roller bearing, spacer B; spacer A, outer ring of oil ring sleeve is provided with rear bearing gland, oil chamber cover, outer ring of spacer B is provided with front bearing gland; rear bearing gland There is a driving end bearing cap between the front bearing glands; an oil throwing ring is arranged on the oil chamber sleeve; a temperature measuring element is arranged on the driving end bearing cap; the rear bearing gland and the front bearing gland are respectively connected to the driving end by screws. The bearing body is connected; the lower end of the bearing body of the driving end is provided with a pipe plug, and the left end surface is provided with several cooling fins; the bearing cover of the driving end is provided with several cooling fins, which are connected with the bearing body of the driving end through studs and nuts. The utility model is convenient to assemble and disassemble, solves the problems of the complexity and high failure rate of the prior art system, and reduces the cost.

Description

A driving bearing structure for starting a water pump

technical field

The utility model relates to a start-up feedwater pump for a nuclear power plant, in particular to a drive bearing structure for start-up feedwater pumps.

Background technique

Due to the continuous development of national nuclear power technology, the demand for supporting equipment is also increasing, such as nuclear pumps. At this stage, the nuclear pump market of my country's nuclear power plants still relies on foreign imports, and only some nuclear three-stage pumps have achieved localization. Therefore, under the background of the great development of national nuclear power, realizing the localization of nuclear pumps has become the most urgent task of the national nuclear power supervision department, nuclear power enterprises and domestic water pump industry.

The main function of the pneumatic feed water pump and its pipeline for nuclear power is not only to provide backup water supply capacity when the booster pump/main feed water pump or its associated pipeline fails, to perform the defense-in-depth function of decay heat discharge, but also to have The ability to provide start-up water to the steam generator.

The existing start-up feed water pumps for nuclear power plants have disadvantages: the bearing seat parts adopt an integral design, the maintenance workload of the bearings is large, the maintenance is inconvenient, and the maintenance cost is high.

The bearing structure on the existing start-up water pump usually adopts forced lubrication, and is equipped with an external oil supply system to supply oil to the bearing. The external oil supply system includes external oil pumps, oil tanks, coolers and pipelines, etc., thus increasing the complexity of the system and sources of failure and increasing operating costs.

In the prior art, since the bearing part of the general driving end is close to the motor side, the motor is not allowed to be moved during disassembly and assembly, so the disassembly space is narrow and very inconvenient during disassembly and assembly. At the same time, it not only causes too much waste of manpower and material resources in the process of disassembly and assembly, but also leads to the probability of damage to devices in the process of disassembly and assembly. Therefore, it is particularly important to design a driving bearing structure that is easy and convenient to disassemble.

Contents of the invention

The technical problem to be solved by the utility model is to provide a driving bearing structure for starting the feed water pump which is convenient for disassembly and assembly, reduces the complexity and failure rate of the system, and can reduce the operating cost.

The technical scheme that the utility model solves the problems of the technologies described above is as follows:

A driving bearing structure for starting a feed water pump, characterized in that a pump shaft is arranged in the middle of the driving bearing structure, dust-proof disks are arranged at the left and right ends of the pump shaft, and dust-proof disks are arranged in sequence from left to right between the two dust-proof disks. Spacer A, oil ring sleeve, cylindrical roller bearing, and spacer B; the outer ring of the spacer A and oil ring sleeve is provided with a rear bearing gland and an oil chamber sleeve, and the outer ring of the spacer B is provided with a front bearing Gland; a driving end bearing cap is arranged between the rear bearing gland and the front bearing gland; insulating gaskets are respectively arranged between the driving end bearing cap, the front bearing gland, and the rear bearing gland; The rear bearing gland is positioned through the pin and the oil chamber sleeve; the oil chamber sleeve is provided with an oil throwing ring; the upper driving end bearing cover of the cylindrical roller bearing is provided with a temperature measuring element with an O-ring , and fixed by temperature measuring screws; the drive end bearing cover is also provided with an upper end cover and fixed by ring screws; the dust plate at the right end is connected to the pump shaft with an O-ring; the rear bearing cover , The front bearing gland is respectively connected with the bearing body of the driving end by screws; the lower end of the bearing body of the driving end is provided with a pipe plug, the left end surface is provided with several cooling fins, and an oil level gauge is arranged outside the end perpendicular to the left end surface , the other end is provided with an oil mark; the drive end bearing cover is provided with several cooling fins, and one end of the drive end bearing cover is connected with the drive end bearing body through a double-headed stud and a nut, and the other end is respectively connected with the drive end bearing body through a taper pin and a nut .

Fourteen cooling fins are arranged on the bearing cover of the driving end, seven cooling fins are arranged on each side, and thirty-one cooling fins are arranged on the left end surface of the bearing body of the driving end.

The insulating gasket is a green shell paper gasket.

The driving bearing structure used for starting the feed water pump described in the utility model has the characteristics of convenient disassembly and assembly, and at the same time reduces the complexity and failure rate of the system, and can reduce the operating cost.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a left view of the utility model.

1. Dustproof plate, 2. Rear bearing gland, 3. Insulation gasket, 4. Drive end bearing cover, 5. Upper end cover, 6. Spacer sleeve A, 7. Lifting ring screw, 8. Oil ring sleeve, 9. Temperature measuring screw, 10, O-ring, 11, temperature measuring element, 12, cylindrical roller bearing, 13, front bearing gland, 14, key, 15, spacer B, 16, screw, 17, oil throwing ring, 18. Oil chamber sleeve, 19. Pin, 20. Drive end bearing body, 21. Pipe plug, 22. Oil level gauge, 23. Stud, 24. Nut, 25. Tapered pin, 26. Oil mark, 27 , Pump shaft, 28, heat sink.

detailed description

As can be seen from the figure, a driving bearing structure for starting a feed water pump is characterized in that: a pump shaft 27 is arranged in the middle of the driving bearing structure, and a dust-proof disk 1 is arranged at the left and right ends of the pump shaft 27, and the two dust-proof disks 1 The spacer A6, the oil ring sleeve 8, the cylindrical roller bearing 12, and the spacer B15 are arranged sequentially from left to right; the outer ring of the spacer A6 and the oil ring sleeve 8 is provided with a rear bearing gland 2 and an oil chamber Cover 18, and the outer ring of the spacer B15 is provided with a front bearing gland 13; between the rear bearing gland 2 and the front bearing gland 13, a driving end bearing cap 4 is arranged; the driving end bearing cap 4 and the front The bearing gland 13 and the rear bearing gland 2 are also provided with insulating gaskets 3 respectively; the rear bearing gland 2 is positioned with the oil chamber sleeve 18 through the pin 19; the oil chamber sleeve 18 is provided with an oil thrower Ring 17; the upper driving end bearing cover 4 of the cylindrical roller bearing 12 is provided with a temperature measuring element 11 covered with an O-ring 10, and is fixed by a temperature measuring screw 9; the driving end bearing cover 4 is also provided with a The upper end cover 5 is fixed by the lifting ring screw 7; the O-ring 10 is arranged at the connection between the dustproof disk 1 on the right end and the pump shaft 27; The end bearing body 20 is connected; the lower end of the driving end bearing body 20 is provided with a pipe plug 21, the left end surface is provided with several cooling fins 28, an oil level gauge 22 is provided outside one end perpendicular to the left end surface, and the other end is provided with a Oil mark 26; said driving end bearing cover 4 is provided with several cooling fins 28, and one end of driving end bearing cover 4 passes stud 23 and nut 24 simultaneously, and the other end passes conical pin 25 and nut 24 respectively and driving end The bearing body 20 is coupled.

Fourteen cooling fins 28 are arranged on the bearing cover 4 of the driving end, seven cooling fins are arranged on each side, and thirty-one cooling fins 28 are arranged on the left end surface of the bearing body 20 of the driving end.

The insulating gasket 3 is a green shell paper gasket.

During specific implementation, the drive-end bearing components include a drive-end bearing body, a drive-end bearing cover, a cylindrical roller bearing, a bearing gland, an oil throwing ring and the like. The cylindrical roller bearing bears the radial force of the rotor part, and the bearing is lubricated by lifting oil through the oil throwing ring. The bearing body and the bearing cover are processed with cooling fins, which increases the heat dissipation area between it and the air. Since the bearing part of the driving end is close to the motor side, the motor is not allowed to be moved during disassembly and assembly, so the disassembly space is small, and the inner and outer rings of the cylindrical roller bearing are separated. The drive end bearing seat part adopts a split structure design, and the split surface is positioned by pins so that the outer ring of the bearing can be removed together with the bearing body, and the inner ring of the bearing can be removed with a special tool. The whole disassembly process is simple and easy.

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent flow conversion made by using the content of the utility model specification is directly or indirectly used in other related technical fields. , are all included in the scope of patent protection of the utility model in the same way.

To sum up, the driving bearing structure for starting the feedwater pump described in the utility model has the characteristics of easy disassembly and assembly, reduces the complexity and failure rate of the system, and can reduce the operating cost.

Claims (3)

1. one kind for starting the driving bearing structure of feed water pump, it is characterized in that: in the middle of driving bearing structure, be provided with pump shaft (27), the two ends, left and right of pump shaft (27) are provided with dust pan (1), and two dust pans are disposed with spacer A(6 between (1) from left to right), oil ring cover (8), roller bearing (12), spacer B(15); Described spacer A(6), oil ring cover (8) outer ring be provided with rear bearing gland (2), grease chamber cover (18), spacer B(15) outer ring be provided with fore bearing gland (13); Drive end bearing lid (4) is provided with between described rear bearing gland (2), fore bearing gland (13); Insulation spacer (3) is also respectively arranged with between described drive end bearing lid (4) and fore bearing gland (13), rear bearing gland (2); Described rear bearing gland (2) overlaps (18) by pin (19) with grease chamber and locates; Described grease chamber's cover (18) is provided with disc (17); Top drive end bearing lid (4) of described roller bearing (12) is arranged the temperature measuring element (11) that cover has O type circle (10), and fixed by thermometric screw (9); Described drive end bearing lid (4) is also provided with upper end cap (5) and is fixed by lifting bolt (7); Dust pan (1) and pump shaft (27) joint of described right-hand member are provided with O type circle (10); Described rear bearing gland (2), fore bearing gland (13) connect with drive end bearing body (20) respectively by screw (16); The lower end of described drive end bearing body (20) is provided with pipe plug (21), and left side is provided with several radiating fin (28), has oil level indicator (22) with one end arranged outside of left side vertical surface, and the other end is provided with oil ga(u)ge (26); Described drive end bearing lid (4) is provided with several radiating fin (28), one end of drive end bearing lid (4) is by stud (23) and nut (24) simultaneously, and the other end is connected with drive end bearing body (20) respectively by taper pin (25) and nut (24).

2. a kind of driving bearing structure for starting feed water pump according to claim 1, it is characterized in that: described drive end bearing lid (4) is provided with 14 radiating fin (28), every limit is provided with seven radiating fin, and the left side of drive end bearing body (20) is provided with 31 radiating fin (28).

3. a kind of driving bearing structure for starting feed water pump according to claim 1, is characterized in that: described insulation spacer (3) is fish paper pad.