Ultra-large horizontal water pump rotor turning mechanism

Abstract

The utility model relates to the field of large water pump installation and debugging equipment, and discloses an ultra-large type horizontal water pump rotor turning mechanism which comprises an installation base, a ratchet wheel coupler, a connecting plate and a driving oil cylinder, one end of the ratchet wheel coupler is coaxially and fixedly connected with the shaft end of a water pump rotor, and the other end of the ratchet wheel coupler is provided with a ratchet wheel part. A through circular through hole is formed in the connecting plate, the ratchet wheel part is accommodated in the circular through hole, and at least one pawl matched with the ratchets is arranged at the edge of the circular through hole of the connecting plate; the cylinder barrel end of the driving oil cylinder is hinged to the mounting base, and the piston rod end is hinged to the end, away from the circular through hole, of the connecting plate; telescopic motion of the driving oil cylinder drives the pawl to push the ratchet to rotate unidirectionally through the connecting plate, and then the water pump rotor is driven to rotate unidirectionally and intermittently. Driving force is provided by utilizing the advantage of hydraulic pressure, reliable one-way driving and accurate positioning are realized by utilizing the ratchet mechanism, the manpower limit is broken through, the structure is simple, and the operation and maintenance cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of large water pump installation and debugging equipment, in particular to an ultra-large horizontal water pump rotor turning mechanism. Background Art

[0002] During the installation and commissioning of horizontal water pumps, accurate rotor coaxiality testing is crucial for ensuring long-term, stable operation. This process involves rotating the rotor to determine if there is abnormal friction, jamming, or foreign matter lodged between key areas, such as the rotor and pump casing, the impeller and seal rings, and the shaft and bearings. This helps identify and eliminate potential hazards in advance, ensuring pump reliability during startup and operation.

[0003] Small and medium-sized horizontal pumps have low rotor cranking torque. Manual cranking is typically performed using a half-cranking tool placed on the outside of the pump coupling. A wrench is inserted into the tool's hole and the wrench is twisted to crank the pump. For large horizontal pumps with rotors weighing over 100 tons, the cranking torque can reach 40,000 Nm, making traditional manual cranking solutions completely ineffective. Some projects have experimented with electric cranking, using a servo motor to drive a planetary reducer, which then transmits torque through a gear set meshing with the outer ring gear of the coupling. However, electric cranking systems are complex and expensive to operate. Utility Model Content

[0004] The utility model aims to solve the technical problems existing in the above-mentioned prior art and provides a super-large horizontal water pump rotor turning mechanism, which utilizes a hydraulically driven ratchet mechanism to achieve reliable unidirectional drive and solve the problem of super-large horizontal water pump rotor turning.

[0005] The technical solution adopted by the utility model is as follows: an ultra-large horizontal water pump rotor winching mechanism, including a mounting base, a ratchet coupling, a connecting plate, and a driving oil cylinder, one end of the ratchet coupling is coaxially fixedly connected to the water pump rotor shaft end, and the end of the other end of the ratchet coupling is provided with a circle of ratchet teeth protruding from the surface of the end to form a ratchet part; a circular through hole is provided on the connecting plate, the size of the circular through hole matches the ratchet part, so that the ratchet part can be accommodated in the circular through hole; the connecting plate is provided with at least one pawl that cooperates with the ratchet teeth at the edge of the circular through hole; the cylinder end of the driving oil cylinder is hinged to the mounting base, and its piston rod end is hinged to the end of the connecting plate away from the circular through hole; the telescopic movement of the driving oil cylinder drives the pawl through the connecting plate to push the ratchet teeth to rotate unidirectionally, thereby driving the water pump rotor to perform unidirectional intermittent rotational movement.

[0006] Furthermore, the ratchet coupling is a split-half structure, comprising an upper coupling half and a lower coupling half split along the axial plane, the two being fastened together by bolts to form a complete coupling, and the ratchet teeth are symmetrically processed on the split end faces of the upper coupling half and the lower coupling half, forming a continuous circle of ratchet teeth when the two are assembled.

[0007] Furthermore, the connecting plate is provided with a sliding groove extending radially along the through hole on the side of the circular through hole, and the pawl can be slidably embedded in the sliding groove, and its head is a wedge-shaped tooth surface that engages with the ratchet teeth. A return spring is provided between the bottom of the sliding groove and the pawl to force the pawl to maintain a tendency to engage with the ratchet teeth.

[0008] Furthermore, the chute is a U-shaped chute structure with an open top, and a cover plate for closing the top opening of the chute is detachably mounted on the connecting plate by bolts.

[0009] Furthermore, the connecting plate is in a teardrop shape, the circular through hole is opened at its circular large end portion, and the piston rod of the driving oil cylinder is hinged at its small end.

[0010] Furthermore, it also includes a connecting rod seat coaxially arranged with the shaft end of the water pump rotor, one end of the connecting rod seat is fixedly connected to the ratchet end side of the ratchet coupling through circumferentially evenly distributed bolts, and the other end of the connecting rod seat is rotatably connected to a rocker arm through a bearing at the center, the rocker arm is hinged with a pull rod, and the other end of the pull rod is hinged to the mounting base.

[0011] The beneficial effects of the present invention are as follows: the present invention adopts an articulated connecting plate to drive the oil cylinder, and converts the linear reciprocating motion of the oil cylinder into unidirectional intermittent rotational motion of the water pump rotor through the connecting plate and the pawl-ratchet mechanism. It utilizes the advantages of hydraulics to provide huge driving force, and utilizes the ratchet mechanism to achieve reliable unidirectional drive and precise positioning, breaking through the limit of manpower. Compared with the electric winch, it eliminates components such as servo motors and multi-stage reduction gear boxes, has a simpler structure, no hidden dangers of electrical component failure, greatly reduces operating and maintenance costs, and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 It is a structural schematic diagram of the ratchet coupling of the present utility model.

[0014] Figure 3 It is a structural schematic diagram of the connecting plate of the utility model.

[0015] Figure 4 It is a schematic diagram of the overall structure of the utility model after the connecting rod seat is installed.

[0016] In the figure: mounting base 1, ratchet coupling 2, ratchet 3, connecting plate 4, pawl 5, driving cylinder 6, circular through hole 7, slide groove 8, return spring 9, cover plate 10, connecting rod seat 11, bearing 12, rocker arm 13, pull rod 14. DETAILED DESCRIPTION

[0017] In order to facilitate the understanding of the present invention, the present invention will be described in more comprehensive and detailed manner below in conjunction with the accompanying drawings and preferred embodiments of the specification, but the protection scope of the present invention is not limited to the following specific embodiments.

[0018] like Figure 1-Figure 3 As shown, this embodiment provides an ultra-large horizontal water pump rotor winching mechanism, comprising a mounting base 1, a ratchet coupling 2, a connecting plate 4, and a drive cylinder 6. The mounting base 1 serves as the fixed foundation for the entire mechanism. One end of the ratchet coupling 2 is coaxially fixedly connected to the shaft end of the water pump rotor, serving as an interface for power transmission to drive the water pump rotor. The other end is provided with a circle of ratchet teeth 3 protruding from the surface of the end, forming a ratchet portion. The connecting plate 4 is provided with a through circular through hole 7, the size of which matches the ratchet portion so that the ratchet portion can be accommodated within the circular through hole 7. The connecting plate 4 is provided with at least one (three shown in the drawings of this embodiment) ratchet pawl 5 that cooperates with the ratchet teeth 3 at the edge of the circular through hole 7. The connecting plate 4 serves as an intermediate component for power conversion and transmission, converting the linear motion of the drive cylinder 6 into the intermittent rotational motion of the ratchet coupling 2. The drive cylinder 6 provides the driving force required for turning the gear. Its barrel end is hinged to the mounting base 1, and its piston rod end is hinged to the end of the connecting plate 4 that is away from the circular through-hole 7. The telescopic movement of the drive cylinder 6 drives the pawl 5 through the connecting plate 4, causing the ratchet 3 to rotate unidirectionally, thereby driving the water pump rotor to perform unidirectional intermittent rotation.

[0019] like Figure 2 As shown, in this embodiment, the ratchet coupling 2 is a split-half structure, comprising an upper coupling half and a lower coupling half, split along the axial plane. The two halves are bolted together to form a complete coupling. Ratchet teeth 3 are symmetrically machined onto the split end surfaces of the upper and lower coupling halves, forming a continuous ring of ratchet teeth 3 when joined. This split-half design allows for direct radial installation and removal of the coupling without axially moving the rotor, significantly improving assembly and removal efficiency.

[0020] like Figure 3 As shown, in this embodiment, a slot 8 extending radially along the circular through hole 7 is provided on the side of the connecting plate 4. The pawl 5 is slidably embedded in the slot 8. The head of the pawl 5 has a wedge-shaped tooth surface that meshes with the ratchet teeth 3. A return spring 9 is provided between the bottom of the slot 8 and the pawl 5 to force the pawl 5 to maintain its engagement with the ratchet teeth 3. This embodiment, through the slot structure, has stronger impact resistance and improved transmission stability.

[0021] In order to facilitate the disassembly, assembly and maintenance of the pawl 5, the slide groove 8 is a U-shaped groove structure with an open top, and a cover plate 10 for closing the top opening of the slide groove 8 is detachably mounted on the connecting plate 4 by bolts.

[0022] The connecting plate 4 is teardrop-shaped, with a circular through-hole 7 defined at its large, rounded end. The piston rod of the drive cylinder 6 is hinged to its smaller end. This structural design ensures rigidity in the critical area (the ratchet meshing section) while achieving lightweight construction and stress optimization, perfectly matching the high-frequency reciprocating operation of the hydraulic turning mechanism.

[0023] like Figure 4 As shown, as an optimization of the above embodiment, this mechanism also includes a connecting rod seat 11 coaxially arranged with the shaft end of the water pump rotor. One end of the connecting rod seat 11 is fixedly connected to the side of the ratchet tooth 3 of the ratchet coupling 2 via circumferentially evenly distributed bolts. The center of the other end of the connecting rod seat 11 is rotatably connected to a rocker arm 13 via a bearing 12. The rocker arm 13 is hingedly connected to a pull rod 14, the other end of which is hinged to the mounting base 1. This design, through the rocker arm 13 and pull rod 14, relatively fixes the rotor axis to the mounting base 1, preventing the rotor from shaking when subjected to cranking torque, thus solving the problem of shaft shaking during cranking of very large rotors.

[0024] Many modifications and other embodiments of the present invention will occur to those skilled in the art with the aid of the teachings presented in the foregoing description and the associated drawings. Therefore, it is to be understood that the present invention is not limited to the specific embodiments disclosed, and modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. A super-large horizontal water pump rotor turning mechanism, comprising a mounting base (1), characterized in that: The invention also includes a ratchet coupling (2), a connecting plate (4), and a driving oil cylinder (6), wherein one end of the ratchet coupling (2) is coaxially fixedly connected to the end of the water pump rotor shaft, and the other end of the ratchet coupling (2) is provided with a circle of ratchet teeth (3) protruding from the surface of the end to form a ratchet part; a circular through hole (7) is provided on the connecting plate (4), and the size of the circular through hole (7) matches that of the ratchet part so that the ratchet part can be accommodated in the circular through hole (7); the connecting plate (4) is provided with a circular through hole (7) having a size matching that of the ratchet part so that the ratchet part can be accommodated in the circular through hole (7); The plate (4) is provided with at least one pawl (5) cooperating with the ratchet (3) at the edge of the circular through hole (7); the cylinder end of the driving oil cylinder (6) is hinged to the mounting base (1), and the piston rod end thereof is hinged to the end of the connecting plate (4) away from the circular through hole (7); the telescopic movement of the driving oil cylinder (6) drives the pawl (5) through the connecting plate (4) to push the ratchet (3) to rotate in one direction, thereby driving the water pump rotor to perform unidirectional intermittent rotation movement.

2. The super-large horizontal water pump rotor turning mechanism according to claim 1, characterized in that: The ratchet coupling (2) is a split-half structure, comprising an upper coupling half and a lower coupling half split along an axial plane, the two being fastened together by bolts to form a complete coupling, and the ratchet teeth (3) are symmetrically machined on the split end faces of the upper coupling half and the lower coupling half, and a continuous circle of ratchet teeth (3) is formed when the two are joined.

3. The super-large horizontal water pump rotor turning mechanism according to claim 1, characterized in that: The connecting plate (4) is provided with a sliding groove (8) extending radially along the circular through hole (7) on the side thereof. The pawl (5) is slidably embedded in the sliding groove (8), and its head is a wedge-shaped tooth surface that meshes with the ratchet (3). A return spring (9) is provided between the bottom of the sliding groove (8) and the pawl (5) to force the pawl (5) to maintain a tendency to mesh with the ratchet (3).

4. The super-large horizontal water pump rotor turning mechanism according to claim 3, characterized in that: The chute (8) is a U-shaped chute structure with an open top, and a cover plate (10) for closing the top opening of the chute (8) is detachably mounted on the connecting plate (4) via bolts.

5. The super-large horizontal water pump rotor turning mechanism according to claim 1, characterized in that: The connecting plate (4) is in the shape of a water drop, the circular through hole (7) is opened at its large circular end, and the piston rod of the driving oil cylinder (6) is hinged at its small end.

6. The super-large horizontal water pump rotor turning mechanism according to any one of claims 1 to 5, characterized in that: It also includes a connecting rod seat (11) coaxially arranged with the shaft end of the water pump rotor, one end of the connecting rod seat (11) is fixedly connected to the side surface of the ratchet (3) end of the ratchet coupling (2) through circumferentially evenly distributed bolts, and the center of the other end of the connecting rod seat (11) is rotatably connected to a rocker arm (13) through a bearing (12), and the rocker arm (13) is hinged to a pull rod (14), and the other end of the pull rod (14) is hinged to the mounting base (1).

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