A main pump seal ring groove type processing tool

Abstract

The utility model provides a kind of main pump sealing ring groove type processing frock, including circular cavity, multiple independent pistons are arranged in cavity, the left and right sides of piston are workpiece and end cover respectively, gas supply cavity is the closed space formed between end cover and cavity, the side of each piston and workpiece are in close contact, another side is connected with one gas supply cavity, gas supply cavity is communicated with a pressure input pipe assembly;Pressure input pipe assembly includes: welded pipe, tee pipe, stop valve;Welded pipe is the gas of gas supply cavity, one end of pressure input pipe assembly and end cover fixed connection.This frock can be adjusted by adjusting the pressure of external gas, to accurately adjust the moving distance of piston and then control the moving distance of workpiece, control process precision is high, process is reliable, frock equipment structure is simple and cost is low.

Description

Technical Field

[0001] This utility model relates to the field of dynamic pressure shaft seals for main pumps in nuclear power plants, and in particular to a machining tooling for a grooved sealing ring of a main pump. Background Technology

[0002] The main pump is a key piece of equipment in a nuclear power plant. The mechanical seal is one of the key components of the main pump, used to limit the leakage of reactor coolant. It is also the most easily damaged component on the main pump. Even a slight operational deviation can cause abnormal leakage, or even lead to an emergency reactor shutdown, threatening the safe operation of the power plant and causing huge economic losses.

[0003] The machining of the sealing ring groove of the main pump's dynamic pressure shaft seal is a key process for ensuring the quality of the sealing dynamic pressure effect. Due to its high requirements for design and machining accuracy, the process control is very difficult. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a machining tool for a main pump sealing ring groove.

[0005] To achieve the above-mentioned objectives, the technical solution of this utility model is as follows:

[0006] A main pump sealing ring groove type machining fixture includes a circular cavity 2, with multiple independent pistons 3 evenly distributed around the circumference of the cavity 2. The left and right sides of the pistons are respectively the workpiece 6 and the end cap 1. One side of all the pistons is in close contact with the workpiece 6, and the other side is connected to a gas source cavity 8. The gas source cavity 8 is a sealed space formed between the end cap 1 and the cavity 2. The gas source cavity 8 is connected to a pressure input pipe assembly 4. The pressure input pipe assembly 4 includes: a welded pipe 4.1 extending into the gas source cavity 8. One end of the welded pipe 4.1 is connected to a three-way pipe 4.3. The second end of the three-way pipe 4.3 is connected to a pressure gauge 4.2, and the third end is connected to a shut-off valve 4.4.

[0007] The gas inside the welded pipe 4.1 is introduced into the gas source cavity 8, and one end of the pressure input pipe assembly 4 is fixedly connected to the end cap 1.

[0008] As a preferred embodiment, a first sealing ring 9 is provided between the piston 3 and the air source chamber 8.

[0009] As a preferred embodiment, the upper and lower sides of the cavity 2 are sealed by the second sealing ring 10, the third sealing ring 11 and the end cap 1, respectively.

[0010] As a preferred embodiment, there are 9 pistons.

[0011] As a preferred method, the workpiece 6 is mounted on the cavity by means of the fastening ring 5.

[0012] As a preferred embodiment, the tooling is provided with a protective ring 7 near the outer surface of the workpiece 6.

[0013] As a preferred embodiment, a gap is provided between the cavity 2 and the retaining ring 7 as an adjustment space.

[0014] The working process of this utility model is as follows: external gas enters the gas source cavity 8 after the pressure is adjusted through the pressure input pipe assembly 4. The gas in the gas source cavity 8 pushes the piston 3 to move, and the piston moves in the gas source cavity to push the workpiece 6 to move.

[0015] The beneficial effects of this utility model are as follows:

[0016] This fixture can precisely adjust the piston's movement distance by regulating the pressure of the external gas, thereby controlling the workpiece's movement distance. The control process is highly accurate and reliable, and the fixture has a simple structure and low cost. Attached Figure Description

[0017] Figure 1 This is the front view of this utility model.

[0018] Figure 2 This is a side view of the present invention.

[0019] 1-End cap, 2-Cavity, 3-Piston, 4-Pressure input pipe assembly, 4.1-Welded pipe, 4.2-Pressure gauge, 4.3-Tee pipe, 4.4-Stop valve, 5-Fasting ring, 6-Workpiece, 7-Guard ring, 8-Air source cavity, 9-First sealing ring, 10-Second sealing ring, 11-Third sealing ring. Detailed Implementation

[0020] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0021] like Figure 1 , Figure 2 As shown, this embodiment provides a main pump sealing ring groove type machining fixture, including a circular cavity 2, with multiple independent pistons 3 evenly distributed around the circumference of the cavity 2. The left and right sides of the pistons are respectively the workpiece 6 and the end cap 1. One side of all the pistons is in close contact with the workpiece 6, and the other side is connected to a gas source cavity 8. The gas source cavity 8 is a sealed space formed between the end cap 1 and the cavity 2. The gas source cavity 8 is connected to a pressure input pipe assembly 4. The pressure input pipe assembly 4 includes: a welded pipe 4.1 extending into the gas source cavity 8. One end of the welded pipe 4.1 is connected to a three-way pipe 4.3. The second end of the three-way pipe 4.3 is connected to a pressure gauge 4.2, and the third end is connected to a shut-off valve 4.4.

[0022] The gas inside the welded pipe 4.1 is introduced into the gas source cavity 8, and one end of the pressure input pipe assembly 4 is fixedly connected to the end cap 1.

[0023] As a preferred embodiment, a first sealing ring 9 is provided between the piston 3 and the air source chamber 8.

[0024] As a preferred embodiment, the upper and lower sides of the cavity 2 are sealed by the second sealing ring 10, the third sealing ring 11 and the end cap 1, respectively.

[0025] As a preferred embodiment, there are 9 pistons.

[0026] As a preferred method, the workpiece 6 is mounted on the cavity by means of the fastening ring 5.

[0027] As a preferred embodiment, the tooling is provided with a protective ring 7 near the outer surface of the workpiece 6.

[0028] As a preferred embodiment, a gap is provided between the cavity 2 and the retaining ring 7 as an adjustment space.

[0029] The working process of this utility model is as follows: external gas enters the gas source cavity 8 after the pressure is adjusted through the pressure input pipe assembly 4. The gas in the gas source cavity 8 pushes the piston 3 to move, and the piston moves in the gas source cavity to push the workpiece 6 to move.

[0030] This fixture can precisely adjust the piston's movement distance by regulating the pressure of the external gas, thereby controlling the workpiece's movement distance. The control process is highly accurate and reliable, and the fixture has a simple structure and low cost.

[0031] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A machining fixture for a main pump sealing ring groove, characterized in that: The device includes a circular cavity (2), with multiple independent pistons (3) evenly distributed around the circumference of the cavity (2). The left and right sides of the pistons are the workpiece (6) and the end cap (1), respectively. One side of all the pistons is in close contact with the workpiece (6), and the other side is connected to a gas source cavity (8). The gas source cavity (8) is a sealed space formed between the end cap (1) and the cavity (2). The gas source cavity (8) is connected to a pressure input pipe assembly (4). The pressure input pipe assembly (4) includes a welded pipe (4.1) that extends into the gas source cavity (8). One end of the welded pipe (4.1) is connected to a three-way pipe (4.3). The second end of the three-way pipe (4.3) is connected to a pressure gauge (4.2), and the third end is connected to a shut-off valve (4.4). The gas inside the welded pipe (4.1) is introduced into the gas source cavity (8), and one end of the pressure input pipe assembly (4) is fixedly connected to the end cap (1).

2. The main pump sealing ring groove machining fixture according to claim 1, characterized in that: A first sealing ring (9) is provided between the piston (3) and the air source chamber (8).

3. The main pump sealing ring groove machining fixture according to claim 1, characterized in that: The upper and lower sides of the cavity (2) are sealed by the second sealing ring (10), the third sealing ring (11) and the end cap (1), respectively.

4. The main pump sealing ring groove machining fixture according to claim 1, characterized in that: There are 9 pistons (3).

5. The main pump sealing ring groove machining fixture according to claim 1, characterized in that: The workpiece (6) is mounted on the cavity via the fastening ring (5).

6. The main pump sealing ring groove machining fixture according to claim 1, characterized in that: A protective ring (7) is provided on the outer surface of the tooling near the workpiece (6).

7. The main pump sealing ring groove machining fixture according to claim 6, characterized in that: A gap is provided between the cavity (2) and the protective ring (7) as an adjustment space.

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