Rotor locking structure of double suction pump

Abstract

A double suction pump rotor locking structure comprises a bearing support, bearings are arranged in the bearing support, a pump shaft is connected between the bearings, an impeller is installed on the pump shaft through a key block, shaft sleeves are arranged on the two sides of the impeller, the pump shaft is sleeved with the shaft sleeves, and O-shaped sealing rings and check rings are arranged on the sides, close to the bearings, of the shaft sleeves. The O-shaped sealing ring is arranged between the shaft sleeve and the pump shaft, the check ring is sleeved on the pump shaft to press the O-shaped sealing ring, a shaft sleeve nut is arranged between the check ring and the bearing, a round nut is arranged on the other side, opposite to the shaft sleeve nut, of the bearing, and the shaft sleeve is doubly locked through the shaft sleeve nut and the round nut. The shaft sleeve nut is additionally arranged on the original check ring, the structure is simple, the overall structure size is not affected, and the modification cost is low; the shaft sleeve nut and the round nut are dual-locked, so that the rotor is firmly positioned and is convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of water pumps, in particular to a double-suction pump rotor locking structure. Background Art

[0002] Conventional small and medium-sized double-suction pump rotors all adopt a series structure, that is, shaft sleeves are installed on both sides of the middle impeller, and then retaining rings are installed. The outer side of the retaining ring is directly against the inner ring of the bearing, and is locked and positioned by the round nut on the side of the bearing. However, during the actual operation of the water pump, frequent starting sometimes causes the round nut to loosen, and then the shaft moves. Once the shaft moves, gaps are bound to appear between the end faces of the impeller, shaft sleeve, and retaining ring that cooperate with each other, and the "O" ring between the shaft sleeve and the retaining ring will fail, causing leakage. The leaked liquid will affect the bearing and affect the stable operation of the water pump. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a double-suction pump rotor locking structure in view of the deficiencies of the above-mentioned prior art.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A double-suction pump rotor locking structure comprises a bearing bracket, a bearing is arranged in the bearing bracket, a pump shaft is connected between the bearings, an impeller is installed on the pump shaft through a key block, shaft sleeves are arranged on both sides of the impeller, the shaft sleeve is sleeved on the pump shaft, an "O"-ring and a retaining ring are arranged on the side of the shaft sleeve close to the bearing, the "O"-ring is arranged between the shaft sleeve and the pump shaft, the retaining ring is sleeved on the pump shaft to press the "O"-ring, a shaft sleeve nut is arranged between the retaining ring and the bearing, a round nut is arranged on the other side of the bearing relative to the shaft sleeve nut, and the shaft sleeve is doubly locked by the shaft sleeve nut and the round nut.

[0006] Furthermore, the pump shaft is processed with a first thread segment and a second thread segment on both sides of the bearing installation position, the sleeve nut is screwed on the first thread segment, and the round nut is screwed on the second thread segment.

[0007] Furthermore, a first gasket is arranged between the sleeve nut and the bearing, and a second gasket is arranged between the round nut and the bearing.

[0008] Furthermore, a mounting plate is arranged on the outer side of the shaft sleeve nut, and mounting grooves are evenly distributed on the mounting plate.

[0009] Compared with the prior art, the double-suction pump rotor locking structure of the utility model has the following beneficial effects:

[0010] 1. Add a sleeve nut to the original retaining ring, which has a simple structure, does not affect the overall structural dimensions, and has a low modification cost;

[0011] 2. The shaft sleeve nut and round nut are double locked, the rotor is firmly positioned and easy to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0014] Figure 3 It is a structural schematic diagram of the shaft sleeve nut of the utility model;

[0015] Among them, 1. bearing bracket, 2. bearing, 3. pump shaft, 4. impeller, 5. sleeve, 6. "O" type sealing ring, 7. retaining ring, 8. sleeve nut, 9. round nut, 10. first threaded section, 11. second threaded section, 12. mounting plate, 13. mounting groove, 14. first gasket, 15. second gasket. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present utility model will be described clearly and completely below.

[0017] like Figure 1 to Figure 3 As shown, a double-suction pump rotor locking structure comprises two bearing brackets 1, bearings 2 are arranged in the bearing brackets 1, pump shafts 3 are connected between the bearings 2, impellers 4 are installed on the pump shaft 3 through key blocks, sleeves 5 are arranged on both sides of the impeller 4, sleeves 5 are sleeved on the pump shaft 3, one end of the sleeve 5 is against the impeller 4, and the other end is provided with an "O" type sealing ring 6 and a retaining ring 7 on the side close to the bearing 2, the "O" type sealing ring 6 is arranged between the sleeve 5 and the pump shaft 3, the retaining ring 7 is sleeved on the pump shaft 3 to press the "O" type sealing ring 6, a sleeve nut 8 is arranged between the retaining ring 7 and the bearing 2, a round nut 9 is arranged on the other side of the bearing 2 relative to the sleeve nut 8, the pump shaft 3 is respectively processed with a first thread segment 10 and a second thread segment 11 on both sides of the bearing 2 installation position, the sleeve nut 8 is screwed on the first thread segment 10, and the round nut 9 is screwed on the second thread segment 11, and the sleeve 5 is doubly locked by tightening the sleeve nut 8 and the round nut 9.

[0018] Among them, the round nut 9 can be screwed by a wrench, and a mounting plate 12 is arranged on the outside of the sleeve nut 8, and mounting grooves 13 are evenly distributed on the mounting plate 12. In this embodiment, four mounting grooves 13 are evenly distributed around the mounting plate 12, and the sleeve nut 8 is tightened by clamping the mounting groove with a special wrench tool.

[0019] A first gasket 14 is arranged between the sleeve nut 8 and the bearing 2, and a second gasket 15 is arranged between the round nut 9 and the bearing 2. The first gasket 14 and the second gasket 15 are blocked on the inner ring of the bearing.

[0020] The present invention is not limited to the described embodiments. Those skilled in the art may make some modifications or changes without departing from the spirit and scope of the present invention, that is, within the scope of disclosure. Therefore, the scope of protection of the present invention shall be subject to the scope defined in the claims.

Claims

1. A double-suction pump rotor locking structure, comprising a bearing bracket, a bearing is arranged in the bearing bracket, a pump shaft is connected between the bearings, an impeller is installed on the pump shaft through a key block, and shaft sleeves are arranged on both sides of the impeller, and the shaft sleeves are sleeved on the pump shaft, characterized in that: The shaft sleeve is provided with an "O"-shaped sealing ring and a retaining ring on one side close to the bearing. The "O"-shaped sealing ring is provided between the shaft sleeve and the pump shaft. The retaining ring is sleeved on the pump shaft to press the "O"-shaped sealing ring. A shaft sleeve nut is provided between the retaining ring and the bearing. A round nut is provided on the other side of the bearing relative to the shaft sleeve nut. The shaft sleeve is doubly locked by the shaft sleeve nut and the round nut.

2. A double-suction pump rotor locking structure according to claim 1, characterized in that: The pump shaft is respectively processed with a first thread segment and a second thread segment on both sides of the bearing installation position, the sleeve nut is screwed on the first thread segment, and the round nut is screwed on the second thread segment.

3. A double-suction pump rotor locking structure according to claim 1, characterized in that: A first gasket is arranged between the shaft sleeve nut and the bearing, and a second gasket is arranged between the round nut and the bearing.

4. A double-suction pump rotor locking structure according to claim 1, characterized in that: A mounting plate is arranged on the outer side of the shaft sleeve nut, and mounting grooves are evenly distributed on the mounting plate.

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