Mechanical device for overturning hydraulic component of main pump

Abstract

The invention discloses a mechanical device for overturning a hydraulic component of a main pump, and the composite mechanical device consists of three parts, namely a spiral transmission lifting mechanism, a turbine worm swing mechanism and a hydraulic clamping mechanism. The spiral transmission lifting mechanism is composed of a first servo motor, a stand column, a coupler, a hexagon bolt, a lead screw and a movable cylinder. The turbine worm slewing mechanism consists of a second servo motor, a motor adjusting block, a turbine, a worm, a slewing bearing inner ring, a pin roller, a shell, a circular gasket and a protective shell; the hydraulic clamping mechanism is composed of a conical surface guide cylinder upper shell, a conical surface guide cylinder lower shell, a conical surface ring, a connecting rod, an inner hexagon bolt, a gasket and a nut. The spiral transmission lifting mechanism is connected with the turbine worm swing mechanism through a double-end stud on a movable guide rail, and the turbine worm swing mechanism is connected with the hydraulic clamping mechanism through a disc beam and a connecting element. The device is particularly suitable for precise overturning maintenance operation of nuclear power, thermal power and other large main pump rotors.

Description

Technical Field

[0001] The present invention belongs to the field of mechanical engineering, and particularly relates to a mechanical device for the refurbishment process of the main pump hydraulic components, especially suitable for the multi-angle flipping operation of the pump shaft rotor and the integral rotor, including a screw drive lifting mechanism, a worm and worm gear slewing mechanism, and a hydraulic clamping mechanism. Background Art

[0002] During the refurbishment process of the main pump hydraulic components, it is necessary to flip the pump shaft part rotor and the integral rotor multiple times to complete precision machining, inspection, and assembly. In the prior art, the following problems generally exist in the flipping equipment:

[0003] 1. The clamping force of the clamping mechanism is insufficient, which easily causes large shaft workpieces to slide or shift during the flipping process.

[0004] 2. The precision of the slewing mechanism is low, and it is difficult to achieve smooth rotation under high load.

[0005] 3. The rigidity of the lifting mechanism is poor, which affects the positioning accuracy of the flipping shaft.

[0006] The present invention significantly improves the stability and efficiency of the flipping process through the collaborative design of a hydraulic clamping mechanism, a worm and worm gear slewing mechanism, and a screw drive lifting mechanism. Summary of the Invention

[0007] A mechanical device for flipping the main pump hydraulic components, the device comprises three parts: a screw drive lifting mechanism, a worm and worm gear slewing mechanism, and a hydraulic clamping mechanism; the screw drive lifting mechanism is an up-and-down moving mechanism composed of a first servo motor, a column, a coupling, a lead screw, and a moving cylinder; the worm and worm gear slewing mechanism is a slewing support disc composed of a second servo motor, a motor adjusting block, an outer ring worm, a worm, an inner ring of a slewing bearing, rollers, a housing, a circular gasket, and a protective shell; the hydraulic clamping mechanism is composed of an upper shell of a conical surface guide cylinder, a lower shell of a conical surface guide cylinder, a conical surface ring, a connecting rod, a gasket, and a nut.

[0008] The first servo motor in the screw drive lifting mechanism is fixed to the column by bolts, the output shaft of the first servo motor and the upper end of the coupling are in interference fit, and the lower end of the coupling and the lead screw are also in interference fit;

[0009] The moving cylinder in the screw drive lifting device is in threaded cooperation with the lead screw;

[0010] The screw drive lifting mechanism is connected to the worm and worm gear slewing mechanism through the moving cylinder, and the moving cylinder is connected to the worm and worm gear slewing mechanism through stud bolts;

[0011] The inner ring of the slewing bearing in the worm and worm gear slewing mechanism is connected to the moving cylinder through stud bolts, and there is a housing between the moving cylinder and the inner ring of the slewing bearing.

[0012] 2. Further, the rotation of the worm and worm gear slewing mechanism adopts a single-row crossed roller slewing bearing. The left side of the slewing bearing is connected to the moving cylinder through stud bolts to achieve vertical movement; the right side is connected to the disc beam through stud bolts to achieve rotation.

[0013] 3. Further, the rollers of the worm and worm gear slewing mechanism are evenly arranged on the inner ring of the slewing bearing and the inner track of the worm through round washers. The protective shell and the outer shell form a transition fit to protect the inside of the worm and worm gear slewing mechanism.

[0014] 4. Further, the worm of the worm and worm gear slewing mechanism is driven by a second servo motor, and the second servo motor is fixed through a motor adjusting block.

[0015] 5. Further, the worm gear of the worm and worm gear slewing mechanism is connected to the hydraulic clamping mechanism through the disc beam and connecting elements. Among them, the worm gear is connected to the disc beam through circumferentially arranged stud bolts, the connecting element is connected to the disc beam through circumferentially arranged stud bolts, and the connecting element is connected to the hydraulic clamping device through nesting and bolts.

[0016] 6. Further, the hydraulic clamping mechanism adopts upper and lower shells spliced together. Among them, the upper shell of the conical surface guiding cylinder is connected to the lower shell of the conical surface guiding cylinder through socket head cap screws. One of the threaded holes is on the right side of the upper shell of the conical surface guiding cylinder, and the other is on the left side of the lower shell of the conical surface guiding cylinder. The two ends of the conical surface ring sleeve are stabilized on the shell of the conical surface guiding cylinder through connecting rods, and the nuts at both ends of the connecting rod are pre-tightened to reduce the gap at both ends of the shell of the conical surface guiding cylinder.

[0017] 7. Further, the nut pre-tightening in the hydraulic clamping mechanism adopts hydraulic clamping. The external hydraulic mechanism pressurizes to elongate the bolt, and the nut is tightened to achieve clamping.

[0018] 8. Further, the coupling fitting method in the screw drive lifting mechanism can also adopt transition fit and shrink fit connection; the slewing bearing in the worm and worm gear slewing mechanism can also use a single-row four-point contact slewing bearing, a three-row roller slewing bearing, a double-row spherical slewing bearing; the nut pre-tightening in the hydraulic clamping mechanism can also adopt mechanical clamping and pneumatic pressure.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) Through the mechanical device for flipping the hydraulic components of the main pump described in the present invention, the clamping force is increased to 1.8 times that of the traditional V-block, and the clamping stability is also significantly improved:

[0021] (2) Through the mechanical device for flipping the hydraulic components of the main pump described in the present invention, the rigidity of the slewing mechanism is improved, and the error under the load condition is reduced;

[0022] (3) Through the mechanical device for flipping the hydraulic components of the main pump of the present invention, the comprehensive efficiency is improved, and it is applicable to the renovation scenarios of high-end equipment such as nuclear power main pumps.

[0023] (4) Through the mechanical device for flipping the hydraulic components of the main pump of the present invention, it has high strength, stable structural operation, and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall schematic diagram of the mechanical device for flipping the hydraulic components of the main pump of the present invention.

[0025] Figure 2 It is an overall two-dimensional plane structure schematic diagram of the mechanical device for flipping the hydraulic components of the main pump of the present invention;

[0026] In the figure: 1. Screw drive lifting mechanism; 2. Turbine and worm rotary mechanism; 3. Hydraulic clamping mechanism;

[0027] Figure 3 It is an external shape schematic diagram of the screw drive lifting mechanism of the mechanical device for flipping the hydraulic components of the main pump of the present invention;

[0028] In the figure: 4. First servo motor; 5. Electric box; 6. Coupling; 7. Moving cylinder; 8. Lead screw; 9. Column;

[0029] Figure 4 It is an exploded schematic diagram of the turbine and worm rotary mechanism of the mechanical device for flipping the hydraulic components of the main pump of the present invention;

[0030] In the figure: 10. Worm; 11. Motor adjustment block; 12. Second servo motor; 13. Outer shell; 14. Inner ring of slewing bearing; 15. Round gasket; 16. Roller; 17. Turbine; 18. Protective shell;

[0031] Figure 5 It is an external shape schematic diagram of the hydraulic clamping mechanism of the mechanical device for flipping the hydraulic components of the main pump of the present invention;

[0032] In the figure: 19. Connecting element; 20. Hydraulic clamping device; 21. Disc beam; 22. Hydraulic bolt stretcher; 23. Hydraulic tank;

[0033] Figure 6 It is an exploded schematic diagram of the hydraulic clamping mechanism of the mechanical device for flipping the hydraulic components of the main pump of the present invention.

[0034] In the figure: 24. Tapered surface ring; 25. Connecting rod; 26. Nut; 27. Gasket; 28. Upper shell of tapered surface guide cylinder; 29. Lower shell of tapered surface guide cylinder.

[0035] Figure 7Schematic diagram of the lower shell of the conical surface guiding cylinder of the mechanical device for flipping the main pump hydraulic components of the present invention. Detailed implementation manners

[0036] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0037] A composite mechanical device for flipping the main pump rotor, which is composed of three major parts, namely, a screw drive lifting mechanism, a worm and gear slewing mechanism, and a hydraulic clamping mechanism. Among them, the screw drive lifting mechanism consists of a first servo motor, a column, a coupling, a hexagonal bolt, a lead screw, and a moving cylinder; the worm and gear slewing mechanism consists of a second servo motor, a motor adjustment block, a worm gear, a worm, an inner ring of a slewing bearing, rollers, a housing, a round gasket, and a protective shell; the hydraulic clamping mechanism consists of an upper shell of a conical surface guiding cylinder, a lower shell of a conical surface guiding cylinder, a conical surface ring, a connecting rod, an inner hexagonal bolt, a gasket, and a nut. The screw drive lifting mechanism is connected to the worm and gear slewing mechanism through a stud on the moving cylinder, and the worm and gear slewing mechanism is connected to the hydraulic clamping mechanism through a connecting element.

[0038] Further, in the screw drive lifting mechanism, the first servo motor is fixed on the column by bolts, its output shaft is matched with the upper end of the coupling, the lower end of the coupling is connected with the lead screw in an interference fit manner, the moving cylinder is in threaded fit with the lead screw, and the moving cylinder is connected to the worm and gear slewing mechanism through a stud.

[0039] Further, in the worm and gear slewing mechanism, the inner ring of the slewing bearing is connected to the moving guide cylinder through 20 studs, and the two are spaced 10 mm from the housing; the slewing mechanism adopts a single-row crossed roller slewing bearing. The worm mechanism is driven by the second servo motor and fixed through the motor adjustment block.

[0040] Further, the worm and gear slewing mechanism is connected to the hydraulic clamping mechanism through a disc beam and a connecting element. The turbine device and the disc beam adopt 20 studs arranged in a circumferential manner, the connecting element and the disc beam adopt 12 studs arranged in a circumferential manner, and the connecting element and the clamping mechanism are connected through nesting and bolts.

[0041] Further, the hydraulic clamping mechanism adopts a splicing structure of the upper and lower shells of the conical surface guiding cylinder, which is connected by inner hexagonal countersunk head bolts. The two end conical surface rings are stabilized by connecting rods, and the gap of the guiding cylinder is reduced by pre-tightening with nuts at both ends. Among them, the nut pre-tightening can adopt a hydraulic clamping method.

[0042] Further, when the hydraulic clamping mechanism works, the bolt stretcher applies a certain amount of hydraulic pressure through the hydraulic device, and the pre-tightening force of the hydraulic clamping mechanism can be indirectly obtained, so as to ensure that the pump shaft will not slip off during rotation.

[0043] As Figure 2 shown, the device consists of three parts, namely a screw drive lifting device (1), a worm and worm gear slewing device (2), and a hydraulic clamping device (3).

[0044] As Figure 7 shown, place the pump shaft in the semi-circular arc area (702) of the lower shell of the conical surface guide cylinder, then place the upper shell of the conical surface guide cylinder above the pump shaft, and then tighten the threaded holes (703) of the upper shell of the conical surface guide cylinder and the threaded holes (701) of the lower shell of the conical surface guide cylinder to achieve its preliminary pre-tightening.

[0045] As Figure 6 shown, then place the conical ring (23) at both ends of the upper and lower shells (27, 28) of the conical surface guide cylinder, install the connecting rods in the corresponding holes of the conical ring (23) respectively and pre-tighten them with nuts, install the hydraulic bolt stretcher (21) on one side of the connecting rod, start the hydraulic tank to apply hydraulic pressure to stretch the bolt, tighten the nut again, the clearance of the conical sleeve shrinks and the pre-tightening force is generated to achieve its secondary pre-tightening.

[0046] As Figure 3 shown, control the first servo motor (4) through the electrical box (5) to drive the lifting device and raise the pump shaft to the set height.

[0047] As Figure 4 shown, control the second servo motor (12) through the electrical box (5) to drive the slewing device, so that the slewing bearing rotates at a speed of 0.5 r / min to complete the rotation of the pump shaft, so that the pump shaft can be repaired at a specific angle.

Claims

1. A mechanical device for turning over the hydraulic components of a main pump, the device comprises three parts: a spiral transmission lifting mechanism, a turbine worm rotating mechanism and a hydraulic clamping mechanism; the spiral transmission lifting mechanism is an up-and-down moving mechanism composed of a first servo motor, a column, a coupling, a screw, and a moving cylinder; the turbine worm rotating mechanism is a slewing support plate composed of a second servo motor, a motor adjustment block, an outer ring turbine, a worm, a slewing bearing inner ring, a roller, an outer shell, a round gasket, and a protective shell; the hydraulic clamping mechanism is composed of an upper shell of a conical guide cylinder, a lower shell of a conical guide cylinder, a conical ring, a connecting rod, a gasket, and a nut; The first servo motor in the screw transmission lifting mechanism is fixed on the column by bolts, the output shaft of the first servo motor and the upper end of the coupling are interference fit, and the lower end of the coupling and the lead screw are also interference fit; The moving cylinder and the lead screw in the screw drive lifting device cooperate with each other through threads; The screw transmission lifting mechanism is connected to the turbine worm rotating mechanism through a moving cylinder, wherein the moving cylinder is connected to the turbine worm rotating mechanism through a stud bolt; The inner ring of the slewing bearing in the worm gear slewing mechanism is connected to the moving cylinder through a stud, and the moving cylinder and the inner ring of the slewing bearing are separated by a shell.

2. A mechanical device for turning over the hydraulic components of a main pump according to claim 1, characterized in that: The rotation of the worm gear rotary mechanism adopts a single-row cross roller slewing bearing. The left side of the slewing bearing is connected to the moving cylinder through a stud to achieve up and down movement; the right side is connected to the disc beam through a stud to achieve rotation.

3. A mechanical device for turning over the hydraulic components of a main pump according to claim 1, characterized in that: The rollers of the worm gear rotating mechanism are evenly arranged on the inner ring of the slewing bearing and the inner track of the turbine through round gaskets, and the protective shell and the outer shell form a transition fit to protect the inside of the worm gear rotating mechanism.

4. A mechanical device for turning over the hydraulic components of a main pump according to claim 1, characterized in that: The worm of the worm gear rotating mechanism is driven by a second servo motor, and the second servo motor fixes the motor through a motor adjustment block.

5. The mechanical device for turning over the hydraulic components of the main pump according to claim 1, characterized in that: The turbine of the worm gear slewing mechanism is connected to the hydraulic clamping mechanism through a disc beam and a connecting element, wherein the turbine is connected to the disc beam through circumferentially arranged studs, the connecting element is connected to the disc beam through circumferentially arranged studs, and the connecting element is connected to the hydraulic clamping device through nesting and bolts.

6. A mechanical device for turning over the hydraulic components of a main pump according to claim 1, characterized in that: The hydraulic clamping mechanism adopts the splicing of upper and lower shells, in which the upper shell of the conical guide cylinder and the lower shell of the conical guide cylinder are connected by hexagonal countersunk bolts, one of the threaded holes is on the right side of the upper shell of the conical guide cylinder, and the other is on the left side of the lower shell of the conical guide cylinder. The conical rings at both ends are mounted on the conical guide cylinder shell and stabilized by connecting rods. The nuts at both ends of the connecting rods are pre-tightened to reduce the gap at both ends of the conical guide cylinder shell.

7. A mechanical device for turning over the hydraulic components of a main pump according to claim 1, characterized in that: The nut pre-tightening of the hydraulic clamping mechanism adopts hydraulic clamping. The external hydraulic mechanism applies pressure to lengthen the bolt and clamping is achieved by tightening the nut.

8. The mechanical device for turning over the hydraulic components of the main pump according to claim 1, characterized in that: The coupling matching method in the screw transmission lifting mechanism can also adopt transition matching and expansion connection; the slewing bearing in the turbine worm gear slewing mechanism can also use a single-row four-point contact slewing bearing, a three-row roller slewing bearing, and a double-row ball slewing bearing; the nut pre-tightening in the hydraulic clamping mechanism can also adopt mechanical clamping and air pressure.

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