CN202137410U - Drilling tool for end face of externally-arranged water ring guide vane hole of hydroturbine generator set - Google Patents

Abstract

The utility model relates to a drilling tool for the end face of an externally-arranged water ring guide vane hole of a hydroturbine generator set, which is characterized by comprising a drill template and a back side shield. The drill template and the back side shield are connected with each other through a countersink bolt assembly. The drill template is equipped with a positioning spigot and a drill jig hole is arranged at the position of the positioning spigot. A matched drill sleeve is arranged inside the drill jig hole. Due to the adoption of the above technical scheme, the drilling and machining of the end face of an externally-arranged water ring guide vane hole can be completed through simple drilling and machining equipment such as a magnetic drill, wherein large-scale machine tools and the processes of marking-out, inspecting and the like are not needed. Therefore, the processes of complicated marking-out, clamping, aligning and the like are simplified so as to reduce the production cost and shorten the construction period.

Description

Drilling tooling for the end surface of the guide vane hole of the external water ring of the water wheel engine unit

technical field

The utility model belongs to the technical field of hydroelectric generator manufacturing, in particular to a drilling tool for the end face of the guide vane hole of the water distribution ring outside the hydroelectric engine group.

Background technique

The outer water distribution ring is the key part of the assembly part of the water guide mechanism in the water machine part of the hydroelectric generator set. The flow surface of the outer water distribution ring is a spherical crown surface. At the same time, there are 16 movable guide vane installation shaft holes in the conventional unit. For the structural form, it has always been a difficult point in the field of processing and manufacturing to realize the efficient and high-quality processing of the coupling hole end face of the guide vane mounting hole of the external water distribution ring.

Contents of the invention

In order to solve the technical problems in the known technology, the utility model provides a simple in structure, convenient in use and high in working efficiency, which is a tool for drilling the end surface of the guide vane hole of the external water distribution ring of the water wheel engine group.

The technical scheme that the utility model takes for solving the technical problem existing in the known technology is:

A drilling tool for the end surface of the guide vane hole of the water distribution ring outside the water turbine engine unit, characterized in that the drilling tool includes a drilling template and a back side baffle, and a countersunk bolt assembly is passed between the drilling template and the back side baffle Connection, the said drilling template is provided with a positioning stop, the positioning stop is provided with a drilling hole, and the drilling hole is equipped with a drill sleeve.

The utility model can also adopt the following technical measures:

Process holes are arranged on the back side baffle.

A transition bevel is provided on the back side baffle.

The drilling template is provided with process holes.

The advantages and positive effects of the utility model are: because the utility model adopts the above-mentioned technical scheme, the simple drilling processing equipment such as a magnetic drill is used to complete the drilling process of the end face of the guide vane hole of the outer distribution water ring, without occupying large machine tools and marking lines Inspection and other processes simplify the complicated processes of marking, clamping, and alignment, thereby reducing production costs and shortening the manufacturing period. At the same time, the drill sleeve used in the utility model has been preliminarily standardized, and the end face drilling of the guide vane hole of the water distribution ring in and out of other subsequent hydropower projects can be realized by modifying the shape and positioning dimensions as long as the drilling specifications are consistent. The utility model is simple in structure but ingenious in conception. The design of the tooling uses modern engineering mathematical calculation methods and computer-aided manufacturing scientific means, combined with three-dimensional engineering software simulation profiling, to meet the requirements of design accuracy as much as possible. Similar problems can be used for reference in the future. Intangible reference value.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the drill template structure;

Figure 3 is a schematic diagram of the structure of the back side baffle;

Fig. 4 is a schematic diagram of the drill sleeve structure;

Fig. 5 is a schematic diagram of the structure of the outer water distribution ring.

In the figure: 1. Drilling formwork; 1-1. Positioning stop; 1-2. Drilling formwork hole; 2. Back side baffle; 3. Countersunk bolt assembly; 4. Drill sleeve; 5. Outer water distribution ring.

Detailed ways

In order to further understand the invention content, characteristics and effects of the present utility model, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

Please refer to Fig. 1 to Fig. 5, a kind of tooling for drilling the end face of the guide vane hole of the water distribution ring outside the water turbine engine unit, the drilling tooling includes a drilling template 1, a back side baffle 2, the drilling template 1 and the back side baffle 2 are connected by a countersunk head bolt assembly 3, the drilling template 1 is provided with a positioning stop 1-1, and the positioning stop 1-1 is provided with a drilling die hole 1-2, and the drilling die hole 1-2 A drill sleeve 4 is equipped inside, and in order to reduce the weight of the utility model, the back side baffle plate and the drill template are provided with process holes. The above-mentioned structure adopts notch positioning, which has the advantage of precise positioning; and in actual operation, the drill bushing is installed in the drilling template, and a suitable tolerance fit is selected between the two, thereby realizing the positioning and leading-in functions during drilling, and finally ensuring the drilling Hole processing quality; the back and side baffle itself is also designed with a process hole and a 10° transition bevel, which reduces weight and is easy to observe the installation effect, and the 10° bevel can increase the contact area between the baffle and the inner wall of the outer water distribution ring 5 to avoid The angular contact thus ensures the tightness of the tooling connection.

Firstly, the drilling template and the back side baffle are pre-connected and connected together with countersunk head bolts, and then the reference line position is properly adjusted and the contact area of the back baffle and the inner wall of the external water distribution ring is adjusted to increase the inner wall of the baffle and the external water distribution ring as much as possible. The contact surface is connected to ensure that the connection is tight, the drill sleeve is installed on the corresponding position of the drill template, the simple drilling equipment - the magnetic drill is adsorbed in the center of the drill template, and finally the drill template is used to position the magnetic drill for the end face of the guide vane hole of the external water ring Drilling. In this way, on the basis of meeting the design accuracy requirements, the simple drilling processing equipment such as magnetic drill is used to complete the end face drilling of the guide vane hole of the external water distribution ring, without occupying large-scale machine tools and scribing inspection procedures, which simplifies the complicated scribing, Card loading, alignment and other processes, thereby reducing production costs and shortening the manufacturing period.

Claims (4)

1. hydraulic generator group outer gate barrel stator hole end surface drilling tool; It is characterized in that: this drilling tool comprises bushing plate; Be connected through the dormant bolt assembly between the dorsal part baffle plate, said bushing plate and dorsal part baffle plate, said bushing plate is provided with positioning spigot; The positioning spigot place is provided with the drill jig hole, and said drill jig is fitted with drill bushing in the hole.

2. hydraulic generator group outer gate barrel stator hole end surface drilling tool according to claim 1, it is characterized in that: said dorsal part baffle plate is provided with fabrication hole.

3. hydraulic generator group outer gate barrel stator hole end surface drilling tool according to claim 1, it is characterized in that: said dorsal part baffle plate is provided with the transition oblique angle.

4. hydraulic generator group outer gate barrel stator hole end surface drilling tool according to claim 1, it is characterized in that: said bushing plate is provided with fabrication hole.

Images