Testing device for detecting air tightness of high-temperature alloy annular thin-wall casting and installation method

Abstract

The invention discloses a testing device for detecting the air tightness of a high-temperature alloy annular thin-wall casting and an installation method, relates to the technical field of air tightness detection, and solves the problem that an air tightness testing device is easy to leak air during testing. The device comprises an upper pressing plate and a lower pressing plate, sealing rings are arranged on the upper pressing plate and the lower pressing plate, and the upper pressing plate and the lower pressing plate clamp a to-be-tested piece through the sealing rings; annular T-shaped clamping blocks are arranged on the upper pressing plate and the lower pressing plate, T-shaped grooves are formed in the sealing rings, and the sealing rings are installed on the T-shaped clamping blocks through the T-shaped grooves; the upper pressing plate and the lower pressing plate are connected through a plurality of positioning screw rods; an air tap is arranged on the upper pressing plate; pressure adjusting screws are arranged on the upper pressing plate and the lower pressing plate, and the tail ends of the pressure adjusting screws make contact with the sealing ring. Through the pressure adjusting screw rod, the pressure of the sealing ring and the sealing surface of the casting to be tested can be adjusted according to actual conditions, and the sealing effect is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of air tightness detection, in particular to a testing device and an installation method for detecting the air tightness of a high-temperature alloy ring-shaped thin-wall casting. Background Art

[0002] In the field of aviation industry, the air tightness of high-temperature alloy ring-shaped thin-walled castings plays a vital role in ensuring the safe operation of aircraft. With the continuous advancement of aviation product design, more and more tend to be designed with thin walls and lightweight, which makes the sealing surface narrower during airtight testing. This design trend puts higher requirements and challenges on the design of airtight testing devices. In addition, there are often uneven irregular structures on the surface of castings. Because traditional airtight testing devices are difficult to adjust the local pressure between the sealing ring and the sealing surface of the casting, it is easy to cause air leakage during pressure testing, which seriously affects the accuracy and reliability of the test results, thus posing a potential threat to the safe operation of the aircraft.

[0003] Therefore, it is particularly urgent to develop a new type of airtight testing device. Summary of the invention

[0004] In order to solve the problem that the existing airtightness test device mentioned above is prone to air leakage when performing pressure test on castings, the present invention proposes a test device and installation method for detecting the airtightness of high-temperature alloy ring-shaped thin-walled castings. The present invention can adjust the pressure of the sealing ring and the sealing surface of the casting to be tested according to actual conditions through a pressure adjustment screw to ensure the sealing effect.

[0005] The present invention proposes a testing device for detecting the air tightness of a high-temperature alloy ring-shaped thin-walled casting, which specifically includes an upper pressing plate and a lower pressing plate, both of which are provided with sealing rings, and the upper pressing plate and the lower pressing plate clamp the test piece through the sealing rings; the upper pressing plate and the lower pressing plate are connected by a plurality of positioning screws; an air nozzle is provided on the upper pressing plate; a plurality of pressure adjusting screws are provided on the upper pressing plate and the lower pressing plate, and the ends of the pressure adjusting screws pass through the upper pressing plate and the lower pressing plate and contact with the sealing rings.

[0006] Furthermore, the upper pressing plate and the lower pressing plate are provided with annular T-shaped clamping blocks, the sealing ring is provided with a T-shaped groove, and the sealing ring is installed on the T-shaped clamping block through the T-shaped groove.

[0007] Furthermore, the T-shaped block is provided with a plurality of annular grooves.

[0008] Furthermore, the T-shaped block is provided with a plurality of through holes, and the pressure regulating screw is in contact with the sealing ring through the through holes.

[0009] Furthermore, a plurality of nuts are provided on the upper pressing plate and the lower pressing plate, and the pressure adjusting screw and the nuts are threadedly connected.

[0010] A method for installing the above-mentioned testing device for detecting the air tightness of a high-temperature alloy ring-shaped thin-walled casting comprises the following steps:

[0011] Step 1: Install the sealing ring on the upper pressing plate and the lower pressing plate;

[0012] Step 2: Place the test piece between the upper pressing plate and the lower pressing plate, so that the sealing surface of the test piece fits the sealing ring completely;

[0013] Step 3: Install and tighten the positioning screw;

[0014] Step 4: Install the pressure adjusting screw and air nozzle.

[0015] The beneficial effects of the testing device and installation method for detecting the air tightness of high-temperature alloy ring-shaped thin-wall castings described in the present invention are:

[0016] (1) The test device and installation method for detecting the air tightness of a high-temperature alloy ring-shaped thin-walled casting of the present invention overcome the problem that the existing air tightness test device is prone to leakage when performing a pressure test on the casting. The pressure regulating screw can be used to adjust the pressure of the sealing ring and the sealing surface of the casting to be tested according to actual conditions to ensure the sealing effect;

[0017] (2) The present invention discloses a testing device and installation method for detecting the air tightness of a high-temperature alloy ring-shaped thin-walled casting. A plurality of annular grooves are provided on the T-shaped blocks of the upper pressure plate and the lower pressure plate. The annular grooves can increase the contact area with the sealing ring, improve the friction force, and prevent the sealing ring from sliding and affecting the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] In the attached picture:

[0020] Figure 1 It is a structural schematic diagram of a testing device for detecting the air tightness of a high-temperature alloy ring-shaped thin-wall casting according to the present invention;

[0021] Figure 2 It is a structural schematic diagram of an upper pressing plate of a testing device for detecting air tightness of a high-temperature alloy ring-shaped thin-wall casting according to the present invention;

[0022] Figure 3 It is a structural schematic diagram of a lower pressing plate of a testing device for detecting air tightness of a high-temperature alloy ring-shaped thin-wall casting according to the present invention;

[0023] Figure 4 It is a schematic structural diagram of the cooperation between a sealing ring and a T-shaped block of a testing device for detecting the air tightness of a high-temperature alloy ring-shaped thin-wall casting according to the present invention;

[0024] Figure 5 It is a schematic structural diagram of the cooperation between an upper pressing plate, a lower pressing plate and a test piece of a test device for detecting the air tightness of a high-temperature alloy ring-shaped thin-wall casting according to the present invention;

[0025] Figure 6 It is a schematic diagram of the connection structure of the upper pressing plate and the lower pressing plate of a testing device for detecting the air tightness of a high-temperature alloy ring-shaped thin-walled casting according to the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of a test device for detecting the air tightness of a high-temperature alloy ring-shaped thin-wall casting according to the present invention after installation;

[0027] Figure 8 It is a schematic diagram of the installation position of the gas nozzle of a testing device for detecting the air tightness of a high-temperature alloy ring-shaped thin-wall casting according to the present invention;

[0028] Fig. 9 It is a schematic diagram of the matching structure of a pressure regulating screw, a sealing ring and a test piece of a test device for detecting the air tightness of a high-temperature alloy ring-shaped thin-wall casting according to the present invention;

[0029] Fig.10 It is a structural schematic diagram of an annular groove of a testing device for detecting the air tightness of a high-temperature alloy annular thin-wall casting according to the present invention;

[0030] Fig.11 It is a cross-sectional view of a test piece of a test device for detecting air tightness of a high-temperature alloy ring-shaped thin-wall casting according to the present invention;

[0031] Among them: 1-upper pressure plate, 2-lower pressure plate, 3-air nozzle, 4-pressure adjustment screw, 5-positioning screw, 6-upper sealing ring, 7-lower sealing ring, 8-T-shaped block, 9-T-shaped groove, 10-annular groove, 11-upper sealing surface, 12-lower sealing surface. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0035] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] Specific implementation method 1: See Figure 1-Figure 11 The present embodiment is described in detail. The testing device for detecting the air tightness of a high-temperature alloy ring-shaped thin-walled casting described in the present embodiment specifically comprises an upper pressing plate 1 and a lower pressing plate 2, wherein an upper sealing ring 6 is arranged on the upper pressing plate 1, and a lower sealing ring 7 is arranged on the lower pressing plate 2, wherein the upper sealing ring 6 and the lower sealing ring 7 are opposite to each other, and the upper pressing plate 1 and the lower pressing plate 2 clamp the test piece through the upper sealing ring 6 and the lower sealing ring 7; the upper sealing ring 6 and the lower sealing ring 7 are made of silicone rubber material, and are used to fit tightly with the sealing surface of the casting to form a closed structure; the upper pressing plate 1 and the lower pressing plate 2 are connected through a plurality of positioning screws 5; the upper pressing plate 1 is provided with an air nozzle 3, and high-pressure gas is input into the test piece through the air nozzle 3 to detect the air tightness.

[0037] The upper pressure plate 1 is provided with a plurality of nuts and a plurality of pressure adjusting screws 4, the nuts are fixedly arranged on the upper pressure plate 1, the pressure adjusting screws 4 and the nut threads are matched, the lower end of the pressure adjusting screw 4 passes through the upper pressure plate 1 and contacts the upper sealing ring 6, and the pressure adjusting screw 4 is moved downward by rotating the pressure adjusting screw 4, so as to squeeze the upper sealing ring 6, and the pressure between the upper sealing ring 6 and the sealing surface is adjusted according to the actual contact situation between the sealing surface of the test piece and the upper sealing ring 6 to ensure the sealing effect.

[0038] The lower pressing plate 2 is provided with a plurality of nuts and a plurality of pressure adjusting screws 4, the nuts are fixedly arranged on the lower pressing plate 2, the pressure adjusting screws 4 and the nuts are threadedly matched, the upper end of the pressure adjusting screws 4 passes through the lower pressing plate 2 and contacts the lower sealing ring 7, and the pressure adjusting screws 4 are rotated to move upward, thereby squeezing the lower sealing ring 7, and adjusting the pressure between the lower sealing ring 7 and the sealing surface according to the actual contact between the sealing surface of the test piece and the lower sealing ring 7 to ensure the sealing effect. The pressure adjusting screws 4 use hexagon socket head bolts.

[0039] The upper platen 1 and the lower platen 2 are provided with an annular T-shaped block 8, and the sealing ring is provided with a T-shaped groove 9, and the sealing ring is installed on the T-shaped block 8 through the T-shaped groove 9. The T-shaped block 8 is provided with a plurality of annular grooves 10, and the contact area with the sealing ring is increased through the plurality of annular grooves 10, and the friction force is increased to prevent the sealing ring from sliding and affecting the sealing effect; the T-shaped block 8 is provided with a plurality of through holes, and the pressure regulating screw 4 directly passes through the through holes on the T-shaped block 8 and contacts the sealing ring.

[0040] The test piece is a high-temperature alloy annular thin-wall casting, the upper sealing surface 11 of the high-temperature alloy annular thin-wall casting is in contact with the upper sealing ring 6 , and the lower sealing surface 12 is in contact with the lower sealing ring 7 .

[0041] A method for installing the above-mentioned testing device for detecting the air tightness of a high-temperature alloy ring-shaped thin-walled casting comprises the following steps:

[0042] Step 1: Install the upper sealing ring 6 and the lower sealing ring 7 on the upper pressing plate 1 and the lower pressing plate 2 through the T-shaped groove 9 and the T-shaped clamping block 8;

[0043] Step 2: Place the test piece between the upper pressing plate 1 and the lower pressing plate 2, so that the sealing surface of the test piece fits the sealing ring completely;

[0044] Step 3: Install and tighten the positioning screw 5, connect the upper pressing plate 1 and the lower pressing plate 2, and close the pressing area of ​​the test piece;

[0045] Step 4: Install the pressure regulating screw 4. During the subsequent pressurization process, the pressure applied to the sealing ring by the end face of the pressure regulating screw 4 can be adjusted by rotating the nut. The sealing ring and the sealing surface of the test piece are tightly fitted to optimize the sealing performance. Install the air nozzle 3 and input high-pressure gas to test the air tightness of the test piece.

[0046] To summarize the above implementation cases, a testing device and an installation method for detecting the air tightness of a high-temperature alloy ring-shaped thin-walled casting described in the present invention overcome the problem that air leakage is prone to occur when the existing airtightness testing device is subjected to a pressure test on the casting. Through the pressure adjusting screw 4, the pressure of the sealing ring and the sealing surface of the casting to be tested can be adjusted according to actual conditions to ensure the sealing effect; a testing device and an installation method for detecting the air tightness of a high-temperature alloy ring-shaped thin-walled casting described in the present invention, a plurality of annular grooves 10 are arranged on the T-shaped blocks 8 of the upper pressure plate 1 and the lower pressure plate 2. The annular grooves 10 can increase the contact area with the sealing ring, improve the friction, and prevent the sealing ring from sliding and affecting the sealing effect.

[0047] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the invention. It can also be a reasonable combination of the features recorded in the above implementation methods. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A testing device for detecting the air tightness of a high-temperature alloy ring-shaped thin-walled casting, characterized in that: The invention comprises an upper pressing plate (1) and a lower pressing plate (2), both of which are provided with sealing rings, and the upper pressing plate (1) and the lower pressing plate (2) clamp the test piece through the sealing rings; the upper pressing plate (1) and the lower pressing plate (2) are connected through a plurality of positioning screws (5); the upper pressing plate (1) is provided with an air nozzle (3); the upper pressing plate (1) and the lower pressing plate (2) are provided with a plurality of pressure regulating screws (4), and the ends of the pressure regulating screws (4) pass through the upper pressing plate (1) and the lower pressing plate (2) and contact the sealing rings.

2. The testing device for detecting the air tightness of a high-temperature alloy ring-shaped thin-wall casting according to claim 1, characterized in that: The upper pressing plate (1) and the lower pressing plate (2) are provided with an annular T-shaped clamping block (8), the sealing ring is provided with a T-shaped groove (9), and the sealing ring is installed on the T-shaped clamping block (8) through the T-shaped groove (9).

3. The testing device for detecting the air tightness of a high-temperature alloy ring-shaped thin-wall casting according to claim 2, characterized in that: The T-shaped clamping block (8) is provided with a plurality of annular grooves (10).

4. The testing device for detecting the air tightness of a high-temperature alloy ring-shaped thin-wall casting according to claim 2, characterized in that: The T-shaped block (8) is provided with a plurality of through holes, and the pressure regulating screw (4) contacts the sealing ring through the through holes.

5. The testing device for detecting the air tightness of a high-temperature alloy ring-shaped thin-wall casting according to claim 4, characterized in that: A plurality of nuts are provided on the upper pressing plate (1) and the lower pressing plate (2), and the pressure regulating screw rod (4) is threadedly connected to the nuts.

6. A method for installing the test device for detecting the air tightness of a high-temperature alloy ring-shaped thin-walled casting according to claim 5, characterized in that: The following steps are involved: Step 1: Install the sealing ring on the upper pressing plate (1) and the lower pressing plate (2); Step 2: Place the test piece between the upper pressing plate (1) and the lower pressing plate (2) so that the sealing surface of the test piece fits the sealing ring completely; Step 3: Install and tighten the positioning screw (5); Step 4: Install the pressure adjustment screw (4) and the air nozzle (3).

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