Air tightness monitoring device

Abstract

The invention discloses an air tightness monitoring device, and relates to the technical field of turbine shell performance detection. The device comprises a working table, the top surface of the working table is provided with an axial positioning mechanism, the axial positioning mechanism is provided with a positioning part and a clamping part, the positioning part and the clamping part are oppositely arranged and are arranged on the two axial sides of the turbine shell respectively, and an air filling opening is formed in the positioning part; the circumferential sealing bearing mechanism comprises a bearing table and a pressing and holding sealing mechanism arranged above the bearing table, and the sealing end of the pressing and holding sealing mechanism abuts against an air outlet of a bent pipe of the turbine shell in a sealed mode; the lining sealing supporting mechanism is provided with a sealing blocking block extending into a lining hole of the turbine shell; the air outlet end of the air-blowing cylinder is communicated with the air-entrapping port through a pipeline; the invention aims to solve the problem that the detection accuracy is affected due to poor leakproofness caused by inaccurate positioning of the turbine shell when the air tightness of the turbine shell is detected in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of turbine shell performance detection, in particular to an airtightness monitoring device. Background Art

[0002] Turbine casing air tightness testing is an important part of ensuring the performance of key components such as turbochargers. Its main purpose is to detect whether there are tiny leaks in the turbine casing, thereby ensuring the normal operation and safety of the engine.

[0003] The turbocharger uses the exhaust gas discharged by the engine to drive the turbine to rotate, and the compressor coaxial with the turbine pressurizes the air entering the engine, increasing the air entering the engine per unit time and improving the engine's working efficiency. The turbocharger housing, referred to as the turbine housing, is an important part of the turbocharger. On the one hand, it is connected to the intake pipe to introduce the hot exhaust gas discharged by the engine, and on the other hand, it is sealed with the three-way catalytic converter and the compressor. Due to the large number of parts to be assembled later, the turbine housing and accessories need to be tested for air tightness before and after assembly during the machining process.

[0004] Therefore, it is very necessary to provide a turbine casing air tightness detection tool with high positioning accuracy and the ability to improve the reliability of air tightness detection. Summary of the invention

[0005] The object of the present invention is to provide an airtightness monitoring device to solve the problem that the turbine shell is not accurately positioned during the existing airtightness detection of the turbine shell, and the detection accuracy is affected due to poor airtightness.

[0006] In order to solve the above problems, the present invention adopts the following technical means: An air tightness monitoring device comprises a workbench, wherein the top surface of the workbench is structured as follows: An axial positioning mechanism, wherein the axial positioning mechanism is configured with a positioning portion and a clamping portion, wherein the positioning portion and the clamping portion are arranged opposite to each other and are respectively arranged on both axial sides of the turbine shell, and an air filling port is configured on the positioning portion; A circumferential sealing receiving mechanism, comprising a bearing platform and a pressing and sealing mechanism disposed above the bearing platform, wherein a sealing end of the pressing and sealing mechanism is in sealing contact with a curved pipe air outlet of a turbine housing; A bushing seal support mechanism is constructed with a sealing block extending into the bushing hole of the turbine housing; An air-inflating cylinder, the air outlet of which is connected to the air filling port through a pipeline; The air leakage detection probe is arranged at the abutting gap position between the turbine shell and the positioning part, the clamping part, the sealing end and the sealing block.

[0007] Preferably, the positioning part includes a first support plate installed on the top surface of the positioning table. A support pipe is installed on the top surface of the first support plate. The support pipe extends along the axis of the turbine housing, and the outer wall of the support pipe is arranged in contact with the inner wall of the turbine housing. The end face of the support pipe extending into the turbine housing constitutes the gas injection port.

[0008] Furthermore, the clamping part includes a second support plate arranged on the top surface of the positioning table. A telescopic cylinder is installed on the top surface of the second support plate. A baffle is installed at the telescopic end of the telescopic cylinder. The baffle abuts against the shaft end of the turbine housing. A sealing rubber ring is formed on the surface of the baffle facing the turbine housing. The sealing rubber ring is coaxially arranged with the axis of the turbine housing.

[0009] Furthermore, the bearing table includes support columns installed on the top surface of the operating table. A horizontal abutting table is installed on the top surface of the support columns. The abutting table abuts against the bottom surface of the flange of the elbow end of the turbine housing.

[0010] Furthermore, the pressing and sealing mechanism includes a telescopic and steering mechanism installed on the top surface of the operating table. The rotation axis of the telescopic and steering mechanism is vertically arranged. A horizontal connecting rod is installed at the telescopic end of the telescopic and steering mechanism. A sealing plate serving as the sealing end is installed at the end of the connecting rod.

[0011] Furthermore, the bushing sealing and supporting mechanism includes a telescopic motor installed on the top surface of the operating table. The axis of the telescopic end of the telescopic motor coincides with the axis of the bushing hole of the turbine housing. The sealing plug is arranged at the telescopic end of the telescopic motor.

[0012] Furthermore, a vertical bracket is installed on the top surface of the operating table. The air leakage detection probe is slidably installed on the bracket.

[0013] During the use of the present invention, the following beneficial effects are achieved: One axial end of the turbine shell to be tested is inserted into the positioning part, and the clamping part is used to abut the other end face of the turbine shell. The clamping part and the positioning part are moved similarly to clamp and position the turbine shell axially, and the two axial holes of the turbine shell are blocked. At this time, the turbine shell can also be rotated axially, so that the side bend of the turbine shell is placed horizontally on the bearing platform, so that the bend of the side bend of the turbine shell is in a vertically upward state, and then combined with the sealing end that moves vertically on the pressing and holding sealing mechanism, the sealing end is continuously moved downward so that it abuts against the flange on the outer edge of the bend air outlet of the turbine shell, so that the air outlet of the side bend of the turbine shell is blocked by the sealing end. After the loading position of the turbine shell is adjusted and positioned by the axial positioning mechanism and the circumferential sealing receiving mechanism, the bushing hole on the side of the turbine shell is blocked by the sealing block that extends into the bushing hole of the turbine shell. And under the action of the bushing seal support mechanism, in addition to being able to seal the bushing hole, it can also work with the circumferential seal receiving mechanism to position the turbine shell circumferentially to prevent the turbine shell from accidentally rotating during the air tightness test and affecting the measurement. After the turbine shell is positioned, turn on the air-blowing cylinder to allow the air-blowing cylinder to output a stream of air into the interior of the turbine shell through the air filling port and maintain the pressure. The air tightness of the turbine shell is determined by checking whether the pressure value on the pressure-maintaining gauge on the air-blowing cylinder changes, and the leak location is detected using a leak detection probe. Determine whether the leak occurs at the tooling positioning position or at the turbine shell body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of a turbine housing is provided for the present invention.

[0015] Figure 2 It is a structural schematic diagram of the circumferential sealing receiving mechanism of the present invention in an open state.

[0016] Figure 3 A schematic diagram of the structure of the turbine housing is disassembled for the present invention.

[0017] Among them, 1-working table, 2-positioning part, 3-clamping part, 4-turbine shell, 5-carrying platform, 6-pressing and sealing mechanism, 7-bushing sealing support mechanism, 8-sealing block, 9-inflating cylinder, 10-first support plate, 11-support pipe, 12-second support plate, 13-telescopic cylinder, 14-baffle plate, 15-sealing rubber ring, 16-telescopic steering mechanism, 17-connecting rod, 18-sealing plate, 19-telescopic motor, 20-bracket. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0020] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0021] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art. It is 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 thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Please refer to Figures 1 to 3 As shown, an airtightness monitoring device includes an operating table 1, and the top surface of the operating table 1 is configured with: An axial positioning mechanism, wherein the axial positioning mechanism is configured with a positioning portion 2 and a clamping portion 3, wherein the positioning portion 2 and the clamping portion 3 are arranged opposite to each other and are respectively arranged on both axial sides of the turbine shell 4, and an air filling port is configured on the positioning portion 2; The circumferential sealing receiving mechanism comprises a bearing platform 5 and a pressing and sealing mechanism 6 arranged above the bearing platform 5, wherein the sealing end of the pressing and sealing mechanism 6 is in sealing contact with the elbow air outlet of the turbine shell 4; The bushing seal support mechanism 7 is constructed with a sealing block 8 extending into the bushing hole of the turbine housing 4; The air cylinder 9, the air outlet end of which is connected to the air filling port through a pipeline; The air leakage detection probe is arranged at the abutting gap position between the turbine housing 4 and the positioning portion 2 , the clamping portion 3 , the sealing end and the sealing block 8 .

[0025] In this way, one axial end of the turbine shell 4 to be tested is inserted into the positioning part 2, and the other end face of the turbine shell 4 is abutted by the clamping part 3. The turbine shell 4 is axially clamped and positioned by the close movement of the clamping part 3 and the positioning part 2, and the two axial holes of the turbine shell 4 are blocked. At this time, the turbine shell 4 can also be rotated axially, so that the side bend of the turbine shell 4 is placed horizontally on the bearing platform 5, so that the bend of the side bend of the turbine shell 4 is in a vertically upward state, and then combined with the vertically moving sealing end on the pressing and holding sealing mechanism 6, the sealing end is continuously moved downward so that it abuts against the flange at the outer edge of the bend outlet of the turbine shell 4, so that the outlet of the side bend of the turbine shell 4 is blocked by the sealing end. After the loading position of the turbine shell 4 is adjusted and positioned by the axial positioning mechanism and the circumferential sealing receiving mechanism, the bushing hole on the side of the turbine shell 4 is blocked by the sealing block 8 extending into the bushing hole of the turbine shell 4. And under the action of the bushing seal support mechanism 7, in addition to being able to seal the bushing hole, it can also work with the circumferential seal receiving mechanism to position the turbine shell 4 circumferentially to prevent the turbine shell 4 from accidentally rotating during the air tightness test and affecting the measurement. After the turbine shell 4 is positioned, open the air cylinder 9, and let the air cylinder 9 output a stream of air into the interior of the turbine shell 4 through the air filling port, and maintain the pressure. By checking whether the pressure value on the pressure maintaining gauge on the air cylinder 9 changes, the air tightness of the turbine shell 4 is judged, and the air leakage detection probe is used to detect the leakage position. Determine whether there is a leak at the tooling positioning position or a leak in the turbine shell 4 body.

[0026] Specifically, for the positioning part 2, the positioning part 2 includes a first support plate 10 installed on the top surface of the positioning table. A support pipe 11 is installed on the top surface of the first support plate 10. The support pipe 11 extends along the axis of the turbine housing 4, and the outer wall of the support pipe 11 is arranged in contact with the inner wall of the turbine housing 4. The end surface of the support pipe 11 extending into the turbine housing 4 constructs the gas injection port.

[0027] In this way, by means of the setting of the support pipe 11, in the early stage of assembly, when the clamping part 3 is not in contact with the turbine housing 4, the support pipe 11 can provide good support for the turbine housing 4.

[0028] Meanwhile, the clamping part 3 includes a second support plate 12 arranged on the top surface of the positioning table. A telescopic cylinder 13 is installed on the top surface of the second support plate 12. A contact plate 14 is installed at the telescopic end of the telescopic cylinder 13. The contact plate 14 is in contact with the shaft end of the turbine housing 4. A sealing rubber ring 15 is constructed on the surface of the contact plate 14 facing the turbine housing 4. The sealing rubber ring 15 is coaxially arranged with the axis of the turbine housing 4.

[0029] In this way, when it is necessary to clamp the turbine housing 4, extend the telescopic cylinder 13 in the direction towards the first support plate 10, so that the contact plate 14 is in contact with the turbine housing 4, and cooperate with the sealing rubber ring 15 to realize the axial clamping and positioning of the turbine housing 4 and the sealing of the two axial through holes.

[0030] Furthermore, the bearing table 5 includes support columns installed on the top surface of the operating table 1. A horizontal contact table is installed on the top surface of the support columns. The contact table is in contact with the bottom surface of the flange of the bent pipe end of the turbine housing 4.

[0031] And, the pressing and sealing mechanism 6 includes a telescopic and rotating mechanism 16 installed on the top surface of the operating table 1. The rotation axis of the telescopic and rotating mechanism 16 is vertically arranged. A horizontal connecting rod 17 is installed at the telescopic end of the telescopic and rotating mechanism 16. A sealing plate 18 serving as the sealing end is installed at the end of the connecting rod 17.

[0032] In this way, during the assembly process, drive the sealing plate 18 to move upward by the telescopic and rotating mechanism 16, and horizontally rotate to a position offset from the bent pipe air outlet on the side of the turbine housing 4, so as to facilitate the installation and disassembly of the turbine housing 4 and avoid interference and influence of the sealing plate 18 on the installation and disassembly of the turbine housing 4.

[0033] Furthermore, the bushing sealing and supporting mechanism 7 includes a telescopic motor 19 installed on the top surface of the operating table 1. The axis of the telescopic end of the telescopic motor 19 coincides with the axis of the bushing hole of the turbine housing 4. The sealing plug 8 is arranged at the telescopic end of the telescopic motor 19.

[0034] In this way, by the telescopic movement of the telescopic motor 19, the sealing plug 8 can be inserted into or withdrawn from the bushing hole.

[0035] Meanwhile, a vertical support 20 is installed on the top surface of the workbench 1, and the air leakage detection probe is slidably installed on the support 20.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An airtightness monitoring device, characterized in that, It comprises a workbench (1), wherein the top surface of the workbench (1) has: An axial positioning mechanism, the axial positioning mechanism comprising a positioning portion (2) and a clamping portion (3), the positioning portion (2) and the clamping portion (3) being arranged opposite to each other and respectively arranged on two axial sides of a turbine shell (4), and an air filling port being arranged on the positioning portion (2); A circumferential sealing receiving mechanism comprises a bearing platform (5) and a pressing and sealing mechanism (6) arranged above the bearing platform (5), wherein a sealing end of the pressing and sealing mechanism (6) is in sealing contact with a curved pipe air outlet of a turbine housing (4); A bushing seal support mechanism (7) is constructed with a sealing block (8) extending into a bushing hole of a turbine housing (4); An air-inflating cylinder (9), the air outlet of which is connected to the air filling port via a pipeline; The air leakage detection probe is arranged at the abutment gap position between the turbine housing (4) and the positioning portion (2), the clamping portion (3), the sealing end and the sealing block (8).

2. The airtightness monitoring device according to claim 1, characterized in that The positioning portion (2) comprises a first support plate (10) mounted on the top surface of the positioning platform, a support tube (11) being mounted on the top surface of the first support plate (10), the support tube (11) extending into the turbine shell (4) along the axis, and the outer wall of the support tube (11) being arranged in close contact with the inner wall of the turbine shell (4), and the end surface of the support tube (11) extending into the turbine shell (4) constructs the air filling port.

3. The airtightness monitoring device according to claim 1, characterized in that, The clamping portion (3) comprises a second support plate (12) arranged on the top surface of the positioning platform, a telescopic cylinder (13) is installed on the top surface of the second support plate (12), a retaining plate (14) is installed at the telescopic end of the telescopic cylinder (13), the retaining plate (14) abuts against the axial end of the turbine shell (4), and a sealing rubber ring (15) is constructed on a side of the retaining plate (14) facing the turbine shell (4), and the sealing rubber ring (15) is coaxially arranged with the axis of the turbine shell (4).

4. The airtightness monitoring device according to claim 1, characterized in that The bearing platform (5) comprises a support column mounted on the top surface of the workbench (1), the top surface of the support column being mounted with a horizontal abutment platform, the abutment platform abutting against the bottom surface of the flange at the end of the bent pipe of the turbine housing (4).

5. An airtightness monitoring device according to claim 1 or 4, characterized in that, The pressing and sealing mechanism (6) comprises a telescopic steering mechanism (16) mounted on the top surface of the workbench (1), the rotation axis of the telescopic steering mechanism (16) being arranged vertically, a horizontal connecting rod (17) being mounted at the telescopic end of the telescopic steering mechanism (16), and a sealing plate (18) serving as the sealing end being mounted at the end of the connecting rod (17).

6. The airtightness monitoring device according to claim 1, characterized in that The bushing sealing support mechanism (7) comprises a telescopic motor (19) mounted on the top surface of the workbench (1), the telescopic end axis of the telescopic motor (19) being arranged to coincide with the bushing hole axis of the turbine housing (4), and the sealing block (8) being arranged at the telescopic end of the telescopic motor (19).

7. An airtightness monitoring device according to claim 1, characterized in that, A vertical bracket (20) is installed on the top surface of the workbench (1), and the air leakage detection probe is slidably installed on the bracket (20).

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