CN215927791U - Energy-efficient pre-pump that power plant unit was used - Google Patents

Abstract

The utility model discloses a high-efficiency energy-saving front pump for a power plant unit, which comprises a pump body, wherein a rotor part is arranged in the middle of the pump body, a sliding bearing part is sleeved on one side of the middle of the rotor part, a thrust bearing part is sleeved on the other side of the middle of the rotor part, oil baffles are respectively arranged on two sides inside the sliding bearing part and two sides inside the thrust bearing part, a driving side pump cover is arranged on one side of the inner wall of the pump body, a non-driving side pump cover is arranged on the other side of the inner wall of the pump body, a second winding pad is clamped at the joint of the driving side pump cover and the inner wall of the pump body and the joint of the non-driving side pump cover and the inner wall of the pump body, and a third O-shaped ring is connected to one side of the second winding pad. The service life of the front pump is prolonged.

Description

Energy-efficient pre-pump that power plant unit was used

Technical Field

The utility model relates to the field of pre-pumps, in particular to a high-efficiency energy-saving pre-pump for a power plant unit.

Background

With the development of society, electric energy becomes indispensable energy of daily life, and current electric energy is usually provided by the power plant, often uses the pre-pump in the power plant, and the pressure of pre-pump's main effect is to improve the feed pump entry, prevents that the feed pump from taking place the cavitation. The rotation speed of the front pump is low, and the double-suction structure is adopted, so that the cavitation erosion resistance is good. The preposed pump is a double-suction single-row closed single-stage centrifugal pump, the shell of the preposed pump is of a horizontal middle-open structure, and the outlet and the inlet of the pump are both arranged at the lower part of the pump shell, so that the maintenance of the preposed pump is facilitated.

The pre-pump in practical application has the following problems:

1. the existing 300MW unit front pump has low operation efficiency, the vortex at the front cover plate of the front edge of the impeller of the front pump loses part of energy, the vortex near the suction surface of the trailing edge of the high section of the half blade of the impeller loses part of energy, and the vortex is eliminated after optimization, so that the efficiency of the pump unit is improved; the backflow zone and the low-speed zone eddy at the position of the volute partition tongue of the pump body casting lose part of energy, and the backflow zone and the low-speed zone eddy are eliminated after optimization;

2. the joint of a pump body and a pump cover high-low pressure area of a front pump of the existing 300MW unit is seriously washed after running for a period of time, leakage is generated, the pump efficiency is reduced, the service life of the pump is seriously influenced, radial O-shaped ring sealing is added after transformation, the axial winding gasket sealing is added to prevent leakage, the efficiency of the pump is ensured, and the service life is prolonged;

3. the oil leaks from the oil gear of the prior preposed pump, and after the preposed pump is used for a period of time and the main part shaft of the pump is damaged, the gap is enlarged, the leakage is more serious, the operation effect is good after the transformation, and the oil leakage phenomenon does not occur;

4. the shaft and the positioning table ensure the centering of the impeller, so that the pump can operate at the optimal efficiency point;

generally, the prior preposed pump has low use and operation efficiency and short service life.

Disclosure of Invention

The utility model aims to provide an efficient energy-saving front pump for a power plant unit, which aims to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a high-efficient energy-conserving front-mounted pump that power plant unit used, includes the pump body, the mid-mounting of the pump body has the rotor part, the impeller is installed at the center of rotor part, one side cover at rotor part middle part is equipped with slide bearing part, the opposite side cover at rotor part middle part is equipped with footstep bearing part, the inside both sides of slide bearing part and the inside both sides of footstep bearing part all are equipped with the oil catch, just mechanical seal part is all installed with the junction of the pump body to the rotor part both ends, the pump body is equipped with the drive end mechanical seal with the junction of one of them mechanical seal part, the pump body is equipped with free end mechanical seal with the junction of the other one of them mechanical seal part, drive end mechanical seal and free end mechanical seal all overlap and are equipped with first O shape circle with the pump cover of pump body, one side of pump body inner wall is equipped with drives the side pump cover, the pump body inner wall's opposite side is equipped with the non-side pump cover that drives, just it has the second winding to fill up to drive the equal joint in junction of side pump cover and pump body inner wall and the non-side pump cover that drives and the junction of pump body inner wall, one side of second winding pad is connected with third O shape circle, the equal threaded connection in top of pump body both sides has first double-screw bolt, the equal threaded connection in middle part of first double-screw bolt has first nut, the first nut overlaps with the junction cover of first double-screw bolt and is equipped with first packing ring.

As a preferable technical scheme of the utility model, both sides of the drive end mechanical sealing body and both sides of the free end mechanical sealing body are both in threaded connection with second studs, the middle parts of the second studs are both in threaded connection with second nuts, and second washers are sleeved at the joints of the second nuts and the second studs.

As a preferable technical solution of the present invention, the bottom of the sliding bearing component and the bottom of the thrust bearing component are both connected with a third stud in a threaded manner, the middle part of the third stud is connected with a third nut in a threaded manner, and a third washer is sleeved at the connection position of the third nut and the third stud.

According to a preferable technical scheme of the utility model, first winding pads are arranged on two sides of the top of the inner wall of the pump body, and second O-shaped rings are arranged on one side of the bottom of the pump cover at the driving side and one side of the bottom of the pump cover at the non-driving side.

As a preferred technical scheme, the two sides of the bottom of the pump body are both in threaded connection with a pin shaft, and the middle of the pin shaft is in threaded connection with a fourth nut.

As a preferable technical scheme of the utility model, brackets are respectively installed in the middle of the drive end mechanical sealing body and the middle of the free end mechanical sealing body, and a screwed plug is installed on one side of the pump body close to the bracket.

As a preferred technical scheme of the utility model, two sides of the inner wall of the pump body are sleeved with sealing rings.

Compared with the prior art, the utility model has the beneficial effects that:

the oil baffle is arranged, the operation effect is good, no oil leakage phenomenon occurs, the pump can operate at the optimal efficiency point, and the service life of the front pump is prolonged.

Drawings

FIG. 1 is a front cross-sectional view of the present invention;

FIG. 2 is a block diagram of the non-drive side pump cap connection of the present invention;

FIG. 3 is a view showing a construction of the connection of the sliding bearing members of the present invention;

FIG. 4 is a view showing a connection structure of a first stud according to the present invention;

fig. 5 is a connection structure view of a second stud according to the present invention.

In the figure: 1. a sliding bearing member; 2. a rotor component; 3. a mechanical seal member; 4. a drive end mechanical seal body; 5. a first O-ring; 6. a first winding pad; 7. a second O-ring; 8. a drive side pump cover; 9. a second winding pad; 10. a third O-ring; 11. a pump body; 12. a non-drive side pump cover; 13. a first stud; 14. a first nut; 15. a first gasket; 16. a second stud; 17. a second nut; 18. a second gasket; 19. a thrust bearing member; 20. a third stud; 21. a third nut; 22. a third gasket; 23. a free end mechanical seal body; 24. a pin shaft; 25. a fourth nut; 26. a bracket; 27. plugging with a thread; 28. a seal ring; 29. oil baffle; 30. an impeller.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the utility model provides a high-efficiency energy-saving front pump for a power plant unit, which comprises a pump body 11, wherein a rotor component 2 is installed in the middle of the pump body 11, an impeller 30 is installed in the center of the rotor component 2, a sliding bearing component 1 is sleeved on one side of the middle of the rotor component 2, a thrust bearing component 19 is sleeved on the other side of the middle of the rotor component 2, oil stops 29 are respectively arranged on two sides inside the sliding bearing component 1 and two sides inside the thrust bearing component 19, mechanical sealing components 3 are respectively installed at the joints of two ends of the rotor component 2 and the pump body 11, a drive-end mechanical sealing body 4 is arranged at the joint of the pump body 11 and one of the mechanical sealing components 3, a free-end mechanical sealing body 23 is arranged at the joint of the pump body 11 and the other mechanical sealing component 3, a first O-shaped ring 5 is respectively sleeved at the joints of the drive-end mechanical sealing body 4 and the free-end mechanical sealing body 23 and the pump body 11, a driving side pump cover 8 is arranged on one side of the inner wall of the pump body 11, a non-driving side pump cover 12 is arranged on the other side of the inner wall of the pump body 11, and the joint of the driving side pump cover 8 and the inner wall of the pump body 11 and the joint of the non-driving side pump cover 12 and the inner wall of the pump body 11 are respectively clamped with a second winding pad 9, one side of the second winding pad 9 is connected with a third O-shaped ring 10, the tops of two sides of the pump body 11 are respectively in threaded connection with a first stud 13, the middle part of the first stud 13 is respectively in threaded connection with a first nut 14, the joint of the first nut 14 and the first stud 13 is sleeved with a first gasket 15, the third O-shaped ring 10 and the second winding pad 9 are additionally arranged on the pump body 11, the efficiency is prevented from being reduced by water leakage in a high-pressure area, the pump cover part and the pump body part of the front pump are damaged by erosion, the mechanism of the oil shield 29 has a good operation effect, no oil leakage phenomenon occurs, the pump can operate at an optimal efficiency point by integral matching, and the service life of the front pump is prolonged.

Preferably, both sides of the driving-end mechanical sealing body 4 and both sides of the free-end mechanical sealing body 23 are both in threaded connection with second studs 16, the middle of each second stud 16 is in threaded connection with a second nut 17, a second washer 18 is sleeved at the joint of each second nut 17 and the corresponding second stud 16, and the second studs 16 and the second nuts 17 are arranged for reinforcing the connection of the driving-end mechanical sealing body 4 and the free-end mechanical sealing body 23 with the pump body 11.

Preferably, the bottom of the sliding bearing component 1 and the bottom of the thrust bearing component 19 are both connected with a third stud 20 in a threaded manner, the middle of the third stud 20 is connected with a third nut 21 in a threaded manner, a third washer 22 is sleeved at the joint of the third nut 21 and the third stud 20, and the third stud 20 and the third nut 21 are arranged for reinforcing the connection of the sliding bearing component 1 and the thrust bearing component 19 with the pump body 11.

Preferably, first winding pad 6 is all installed to the both sides at pump body 11 inner wall top, drives one side of side pump cover 8 bottom and the one side of non-side pump cover 12 bottom and all is equipped with second O shape circle 7, sets up second O shape circle 7 and is used for improving the leakproofness of driving side pump cover 8 and non-side pump cover 12 and connecting.

Preferably, both sides of the bottom of the pump body 11 are in threaded connection with a pin shaft 24, the middle of the pin shaft 24 is in threaded connection with a fourth nut 25, and the pin shaft 24 and the fourth nut 25 are arranged and fixed to the bottom of the pump body 11.

Preferably, the bracket 26 is installed in the middle of the drive end mechanical sealing body 4 and the middle of the free end mechanical sealing body 23, the pipe plug 27 is installed on one side of the pump body 11 close to the bracket 26, the pipe plug 27 is arranged to prevent leakage, and the sealing effect is improved.

Preferably, both sides of the inner wall of the pump body 11 are all sleeved with sealing rings 28, and the sealing rings 28 are arranged to improve the sealing performance of the internal connection of the pump body 11.

When in specific use, the utility model relates to a high-efficiency energy-saving preposed pump for a power plant unit, the preposed pump is used for feeding boiler water and can also be used as other clean water pumps, the water conveying temperature is below 210 ℃, the preposed pump is a single-stage double-suction horizontal volute water pump, the inlet and outlet directions are both vertical upwards, the body part and the pump cover part are made by casting, and jointly form a working chamber of an impeller, a pressure gauge, a vacuum gauge and a pipe screw hole are arranged on an inlet flange and an outlet flange of a pump body, a pipe screw hole for discharging water is arranged at the lowest pipe diameter, the impeller 30 is double-side inlet water, the shape is symmetrical, static balance test is carried out when leaving a factory, water passing parts of the pump are symmetrically designed and arranged, axial thrust generated by casting deviation and hydraulic turbulence is completely born by a ball bearing at a non-driving side, a shaft seal adopts integrated mechanical seal, and the mechanical seal adopts an external flushing or self-circulating flushing mode according to requirements, the purpose is all that the heat that the sound ring friction pair produced is taken away by the flush fluid, the rotor is supported by the radial axle bush at both ends to lean on the ball bearing of installing at the pump free end to realize axial positioning, third O shape circle 10 and second winding pad 9 install additional on the pump body 11, prevent that high-pressure area water from leaking the inefficiency and erode the pump cover position and the pump body position of damaging the leading pump, the mechanism operation effect of oil fender 29 is good, no oil leak phenomenon takes place, the whole cooperation makes the pump can operate at best efficiency point, the life of leading pump has been prolonged.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.

Claims (7)

1. The utility model provides a leading pump of energy-efficient that power plant unit was used, includes pump body (11), its characterized in that: the utility model discloses a pump structure, including pump body (11), mid-mounting of pump body (11) has rotor part (2), impeller (30) are installed at the center of rotor part (2), one side cover at rotor part (2) middle part is equipped with slide bearing part (1), the opposite side cover at rotor part (2) middle part is equipped with footstep bearing part (19), the inside both sides of slide bearing part (1) and the inside both sides of footstep bearing part (19) all are equipped with oil fender (29), just mechanical seal part (3) are all installed with the junction of pump body (11) in rotor part (2) both ends, the pump body (11) is equipped with drive end mechanical seal (4) rather than the junction of one of them mechanical seal part (3), the pump body (11) is equipped with free end mechanical seal (23) with the junction of another one of mechanical seal part (3), all overlap with the junction of pump body (11) and establish free end mechanical seal (23) and establish free end mechanical seal (4) There is first O shape circle (5), one side of the pump body (11) inner wall is equipped with drives side pump cover (8), the opposite side of the pump body (11) inner wall is equipped with non-drive side pump cover (12), just it has second winding pad (9) to drive the junction of side pump cover (8) and the pump body (11) inner wall and the equal joint in junction of non-drive side pump cover (12) and the pump body (11) inner wall, one side of second winding pad (9) is connected with third O shape circle (10), the equal threaded connection in top of the pump body (11) both sides has first double-screw bolt (13), the equal threaded connection in middle part of first double-screw bolt (13) has first nut (14), the junction cover of first nut (14) and first double-screw bolt (13) is equipped with first packing ring (15).

2. The efficient energy-saving front pump for the power plant unit as claimed in claim 1, wherein: and both sides of the drive end mechanical sealing body (4) and both sides of the free end mechanical sealing body (23) are respectively in threaded connection with a second stud (16), the middle part of the second stud (16) is respectively in threaded connection with a second nut (17), and a second gasket (18) is sleeved at the joint of the second nut (17) and the second stud (16).

3. The efficient energy-saving front pump for the power plant unit as claimed in claim 1, wherein: the bottom of slide bearing part (1) and the bottom of thrust bearing part (19) all threaded connection have third double-screw bolt (20), the middle part threaded connection of third double-screw bolt (20) has third nut (21), just the junction cover of third nut (21) and third double-screw bolt (20) is equipped with third packing ring (22).

4. The efficient energy-saving front pump for the power plant unit as claimed in claim 1, wherein: first winding pad (6) are all installed to the both sides at pump body (11) inner wall top, drive one side of side pump cover (8) bottom and the one side of non-side pump cover (12) bottom and all be equipped with second O shape circle (7).

5. The efficient energy-saving front pump for the power plant unit as claimed in claim 1, wherein: the pump body (11) is characterized in that both sides of the bottom of the pump body are in threaded connection with a pin shaft (24), and the middle of the pin shaft (24) is in threaded connection with a fourth nut (25).

6. The efficient energy-saving front pump for the power plant unit as claimed in claim 1, wherein: and brackets (26) are arranged in the middle of the drive end mechanical sealing body (4) and the middle of the free end mechanical sealing body (23), and a screwed plug (27) is arranged on one side of the pump body (11) close to the brackets (26).

7. The efficient energy-saving front pump for the power plant unit as claimed in claim 1, wherein: and sealing rings (28) are sleeved on two sides of the inner wall of the pump body (11).

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