Novel piston rod array type bolt fastening structure

Abstract

The utility model relates to the technical field of water turbine mechanical equipment, and discloses a novel piston rod array type bolt combining structure which is composed of a runner hub, a piston rod, an operation frame, array type bolts, array type nuts and a positioning pin. According to the utility model, the installation difficulty of the piston rod is greatly reduced, the maintenance period is shortened, and the safety and economical efficiency of unit maintenance are improved at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbine mechanical equipment, and more specifically to a connection structure of a water turbine runner piston rod. Background Art

[0002] There are three main types of traditional runner servomotor piston rod connection structures: snap ring type, large nut type, and super nut type. The super nut structure is as follows: Figure 3 For medium and small paddle runners, the piston rod diameter is relatively small. Regardless of the connection structure, the size and weight of the connector are relatively conventional, and installation difficulty is average. However, for large paddle runners, the piston rod outer diameter is very large. If a conventional piston rod connection structure is used, the connector weight will be extremely high, and the installation difficulty will increase exponentially, greatly affecting maintenance cycle and safety. Therefore, it is necessary to design a new piston rod connection structure that reduces the installation difficulty of the piston rod connection components while ensuring the strength of the piston rod connection, thereby shortening the maintenance cycle and improving the safety and cost-effectiveness of power plant maintenance. Utility Model Content

[0003] This utility model provides a novel piston rod array bolt connection structure that reduces the installation difficulty of the paddle wheel piston rod and shortens the maintenance cycle. The technical solution of this utility model is composed of a wheel body, a piston rod, an operating frame, an array of bolts, an array of nuts, and a positioning pin. The piston rod and the operating frame are connected by the array of bolts and nuts, and the piston rod and the operating frame are positioned by the positioning pin.

[0004] In the novel piston rod array bolt engagement structure, the piston rod end surface is processed with an array of threaded holes for engagement and fixing.

[0005] In the above-mentioned novel piston rod array bolt engaging structure, the operating frame flange is processed with array through holes for engaging and fixing.

[0006] In the novel piston rod array bolt coupling structure, the operating frame and the piston rod are matched with the stopper.

[0007] Beneficial effects:

[0008] 1. The utility model decomposes a large-sized single connector structure into multiple small-sized connector structures, thereby reducing the difficulty of installation and shortening the maintenance cycle of the power station.

[0009] 2. The utility model is mainly used in the design of piston rods of large-scale paddle-type runner relays, which can significantly reduce the difficulty of unit maintenance and shorten the maintenance cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a cross-sectional view of a new type of piston rod array bolt joint structure;

[0011] Figure 2 This is a plan view of a new type of piston rod array bolt joint structure;

[0012] Figure 3 This is the structural diagram of the traditional piston rod super nut;

[0013] Explanation of the markings in the figure: 1-wheel body; 2-piston rod; 3-operating frame; 4-array bolt; 5-array nut; 6-locating pin. DETAILED DESCRIPTION

[0014] To make the purpose, technical solutions and beneficial effects of the present invention more clear, the following will be further explained in conjunction with the accompanying drawings and specific embodiments. However, each embodiment does not constitute a limitation of the present invention. The specific embodiments described in the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0015] like Figure 1 、 Figure 2 As shown, the utility model is a novel piston rod array bolt coupling structure, which consists of a runner body 1, a piston rod 2, an operating frame 3, an array bolt 4, an array nut 5, and a positioning pin 6.

[0016] The end face of the piston rod 2 is processed with threaded holes arranged in an array, and the operating frame 3 is processed with suitable through holes according to the arrangement of the threaded holes on the end face of the piston rod 2.

[0017] Matching stops are formed on the piston rod 2 and the operating frame 3.

[0018] Connect the piston rod 2 and the operating frame 3, and tighten the array bolts 4, array nuts 5, and positioning pins 6.

[0019] The array bolts 4 and the array nuts 5 are pre-tightened by electric heating.

[0020] Mark the installation positions of the array bolts 4 and array nuts 5 for inspection and repair.

[0021] Working Principle: The novel piston rod array bolt-on structure described in this utility model is suitable for connecting piston rods on large propeller turbines. By breaking down the large, single piston rod connector into multiple smaller connectors, this structure reduces the difficulty of piston rod installation while ensuring the strength of the piston rod connection.

[0022] The technical scope of the present invention is not limited to the contents described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications should all fall within the scope of the present invention.

Claims

1. A novel piston rod array bolt engaging structure, characterized by: The utility model comprises a rotating wheel body (1), a piston rod (2), an operating frame (3), an array type bolt (4), an array type nut (5), and a positioning pin (6); the piston rod (2) and the operating frame (3) are connected by the array type bolt (4) and the nut (5); and the piston rod (2) and the operating frame (3) are positioned by the positioning pin (6).

2. The novel piston rod array bolt engaging structure according to claim 1 is characterized by: The end surface of the piston rod (2) is processed with an array of threaded holes for fixing the handle.

3. The novel piston rod array bolt engaging structure according to claim 1 is characterized by: The flange of the operating frame (3) is processed with array-type through holes for fixing the handle.

4. The novel piston rod array bolt engaging structure according to claim 1 is characterized by: The operating frame (3) and the piston rod (2) are matched to form a stop.

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