CN211439526U - Be used for continuous type steam turbine blade fillet polishing instrument - Google Patents

Abstract

The utility model discloses a fillet polishing tool for a continuous turbine blade, which relates to a polishing tool and aims to solve the problems of long polishing time and low working efficiency of the prior polishing tool for the fillet of the inner back of a steam passage of the continuous turbine blade, and comprises a connecting rod, a conical head and a frosted conical cap; the bottom of the conical head is fixed with one end of the connecting rod; the top of the conical head is provided with a socket, and the socket is cut into the conical head along the altitude of the conical head; the grinding conical cap is a hollow cone with a gap at the bottom, and is matched with the top of the conical head; an inserting plate matched with the inserting opening is fixed in the frosted cone cap, and the frosted cone cap and the conical head are fixed by inserting the inserting plate into the inserting opening; and the outer wall of the sanding conical cap is coated with sand paper.

Description

Be used for continuous type steam turbine blade fillet polishing instrument

Technical Field

The utility model relates to a burnishing tool, concretely relates to instrument of polishing steam turbine blade.

Background

The continuous blades (such as high-pressure regulating stage movable blades or nozzle groups) of the steam turbine are difficult to remove the fine-machined tool lines of a steam passage inner back fillet milling machine due to small gaps between steam passages, some blades cannot be polished by the existing tools due to small throat width, and the existing polishing process is to manually rub the blades with sand paper by an operator so that the blades meet the process requirements. The processing time is long, the polishing effect is not obvious, and the working efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the problem that the back fillet carries out the polishing process in the steam passage of current continuous type blade of steam turbine long time, work efficiency is low, providing a be used for continuous type steam turbine blade fillet polishing tool.

The utility model discloses a be used for continuous type steam turbine blade fillet polishing instrument, including connecting rod, conical head and dull polish cone cap;

the bottom of the conical head is fixed with one end of the connecting rod;

the top of the conical head is provided with a socket, and the socket is cut into the conical head along the altitude of the conical head;

the grinding conical cap is a hollow cone with a gap at the bottom, and is matched with the top of the conical head;

an inserting plate matched with the inserting opening is fixed in the frosted cone cap, and the frosted cone cap and the conical head are fixed by inserting the inserting plate into the inserting opening; and the outer wall of the sanding conical cap is coated with sand paper.

The utility model has the advantages that: the utility model discloses guaranteed the polishing to continuous type blade, shortened process time, because abrasive paper cuts into the fritter and has improved abrasive paper's rate of utilization, greatly reduced manufacturing cost can reach the 100% polishing of this type of blade, makes the product reach technical requirement more, has strengthened the appearance quality of blade, has improved the life of blade.

Drawings

Fig. 1 is a schematic view of a disassembled structure of a polishing tool for a blade fillet of a continuous steam turbine according to the present invention;

FIG. 2 is a schematic view of a disassembled structure of a polishing tool with a socket having protrusions and a socket having recesses;

fig. 3 is a schematic view of a polishing tool with a rotating device.

Detailed Description

In a first specific embodiment, the tool for polishing the fillet of the continuous turbine blade in the first embodiment comprises a connecting rod 1, a conical head 2 and a grinding conical cap 3;

the bottom of the conical head 2 is fixed with one end of the connecting rod 1;

the top of the conical head 2 is provided with a socket 4, and the socket 4 is cut into the conical head 2 along the altitude of the conical head;

the grinding conical cap 3 is a hollow cone with a gap at the bottom, and the grinding conical cap 3 is matched with the top of the conical head 2;

an inserting plate 5 matched with the inserting opening 4 is fixed in the frosted cone cap 3, and the frosted cone cap 3 and the conical head 2 are fixed by inserting the inserting plate 5 into the inserting opening 4; and the outer wall of the sanding conical cap 3 is coated with sand paper.

In particular, the amount of the solvent to be used,

the steam path fillets are polished to ensure the uniformity of the overall appearance of the blade, as such blades are particularly important in steam turbines. The nozzle group and the adjusting stage movable blade are the blades which are impacted most strongly by air pressure, if the surface roughness of the blades has tiny defects, the defect range can be enlarged when the blades are impacted by the strong air pressure, and therefore the service life of the blades is directly influenced by the surface roughness of the blades, or the service life of the whole steam turbine is influenced.

Made according to the abrasive paper of polishing usefulness and handheld pneumatic tool theory of operation the utility model discloses, the manufacture is as follows:

1. processing a 150mm long cylindrical steel bar by using a lathe;

2. sawing one bottom surface of the cylinder vertically downwards along any diameter of the bottom surface by using a hand saw to form a socket 4, wherein the width of the socket 4 is 1mm, and the length of the socket 4 is 15 mm-20 mm;

3. grinding the socket 4 to another 100mm bottom surface into a cone by using an abrasive machine (overheating is not easy to process so as not to affect the hardness of the tool);

4. cutting the sand paper into a square shape with the width of 15 mm-20 mm and the length of 20 mm-30 mm;

5. the tool is mounted and clamped by a rotating device 6 (a hand-held pneumatic tool, such as a hand-held pneumatic drill), the cut sand paper is made into a grinding cone cap 3 or is directly clamped at the socket 4, and the position where the original blade cannot be polished is polished by utilizing the working principle of rotation of the pneumatic tool.

The tool utilizes the working principle of rotation of a pneumatic tool to drive the abrasive paper to perform supplementary processing on the originally-polished part which is not in place, and replaces the original friction of an operator holding the abrasive paper by hands.

Best embodiment, this embodiment is a further description of the first embodiment, and this embodiment further includes a rotating device 6;

the rotating shaft of the rotating device 6 is coaxially fixed with the connecting rod 1, so that the rotating device 6 drives the grinding cone cap 3 to rotate when being started.

Specifically, the sanding cone cap 3 may be made of other hard materials, and the surface of the sanding cone cap is fixed with quartz sand or the like to form a sanding surface, or made of abrasive paper directly, and the sanding surface is exposed on the outer surface.

In the best embodiment, this embodiment is a further description of the first embodiment, in this embodiment, the inner wall of the inserting plate 4 is provided with a plurality of wave-shaped protrusions, and the inserting plate 5 is provided with a concave portion adapted to the wave-shaped protrusions.

Specifically, the protrusions and the recesses are slightly protruded and recessed relative to the surface, and when the frosted cone cap is fixed with the cone head 2, the cone head 2 is slightly deformed, so that the inserting plate 5 is inserted into the inserting hole 4, and when the inserting plate is not subjected to an outward pulling force along the high line of the cone head, the inserting hole 4 always clamps the inserting plate 5 through the protrusions and the recesses, and the inserting plate cannot easily fall off in the process of being driven to rotate by the rotating device 6.

Claims (5)

1. A fillet polishing tool for a continuous turbine blade is characterized by comprising a connecting rod (1), a conical head (2) and a frosted conical cap (3);

the bottom of the conical head (2) is fixed with one end of the connecting rod (1);

the top of the conical head (2) is provided with a socket (4), and the socket (4) is cut into the conical head (2) along the high line of the conical head;

the grinding conical cap (3) is a hollow cone with a gap at the bottom, and the grinding conical cap (3) is matched with the top of the conical head (2);

an inserting plate (5) matched with the inserting opening (4) is fixed in the frosted cone cap (3), and the frosted cone cap (3) is fixed with the cone head (2) by inserting the inserting plate (5) into the inserting opening (4); and sand paper is laid on the outer wall of the sanding conical cap (3).

2. The fillet burnishing tool for a continuous type steam turbine blade according to claim 1, further comprising a rotating device (6);

the rotating shaft of the rotating device (6) is coaxially fixed with the connecting rod (1), so that the rotating device (6) drives the frosted cone cap (3) to rotate when being started.

3. The fillet burnishing tool for a continuous steam turbine blade according to claim 1, wherein the inner wall of the socket (4) is provided with a plurality of wave-shaped protrusions, and the insert plate (5) is provided with recesses adapted to the wave-shaped protrusions.

4. A fillet burnishing tool for a continuous steam turbine blade according to claim 1, 2 or 3, wherein the overall length is 150 mm.

5. The fillet burnishing tool for a continuous steam turbine blade according to claim 4, wherein the width of the socket (4) is 1mm and the length is 15mm to 20 mm.

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