Universal plugging test structure for compressor front cover

Abstract

The utility model provides a kind of general type plugging test structure of compressor front cover, including pedestal for placing and bearing compressor front cover and annular adjusting member located above pedestal;Still include multiple plugging execution members and multiple adjusting holes being opened in annular adjusting member and being distributed circumferentially, each plugging execution member is slidably connected to the bottom of adjusting hole by connecting member, to adapt to plugging the flange hole of different index circle diameter on compressor front cover.The design discards the limitation of traditional technology relying on original bolt of workpiece or single size sealing element, so that operator only needs to loosen connecting member, plugging execution member can be moved along adjusting hole flexibly, so that the index circle diameter of different specifications compressor front cover flange hole is accurately adapted.

Description

Technical Field

[0001] This utility model relates to the technical field of compressor front cover tooling structure, specifically to a universal sealing test structure for compressor front covers. Background Technology

[0002] In the field of compressor manufacturing and maintenance, airtightness testing of the compressor front cover is a critical procedure. This test requires reliable sealing of the shaft hole and circumferentially distributed flange holes of the front cover. Existing technology includes a quick flange hole sealing device disclosed in CN107975650A, which uses a fixed disc with a variable diameter groove combined with a rubber sealing ring, achieving sealing by compressing the rubber ring.

[0003] However, such solutions have obvious limitations: their versatility relies heavily on the pre-installed connecting bolts on the flange as a positioning reference, and they cannot be applied to workpieces without bolts or with different bolt distribution specifications. The structure is mainly for sealing a single hole, and it is difficult to simultaneously adapt to and seal multiple flange holes on the compressor front cover that may have different positions and diameters. Therefore, when faced with diverse compressor front cover specifications, the adaptability is insufficient, tooling changes are frequent, and testing efficiency is low.

[0004] To overcome the above-mentioned defects, there is an urgent need for a sealing structure that is versatile, reliable, and specifically designed for testing compressor front covers. Utility Model Content

[0005] This utility model proposes a universal sealing test structure for compressor front cover, which solves the defect in the prior art that the sealing device relies on the original bolts of the workpiece, which makes it impossible to quickly adapt to the flange holes of various specifications of compressor front cover.

[0006] The technical solution of this utility model is implemented as follows: A universal sealing test structure for compressor front cover includes a base for placing and supporting the compressor front cover and an annular adjusting member located above the base; it also includes multiple sealing actuators and multiple adjusting holes opened on the annular adjusting member and distributed circumferentially, each sealing actuator being slidably connected to the bottom of the adjusting hole via a connector to adapt to sealing flange holes on the compressor front cover at different pitch circle diameters.

[0007] Furthermore, the adjustment hole is an oblong hole, and the sealing actuator is an eccentric sealing plug.

[0008] Furthermore, it also includes a central sealing mechanism set on the base, which includes a main screw fixed on the base and passing through the central shaft hole of the compressor front cover, and a sealing block threaded to the main screw to seal the central shaft hole of the compressor front cover.

[0009] Furthermore, the base has an air hole inside, with one end leading to its top surface and the other end leading to its side or bottom surface.

[0010] Furthermore, it also includes at least two sets of clamping mechanisms that press the sealing actuators on the annular adjusting member against the compressor front cover.

[0011] Furthermore, the clamping mechanism includes a secondary screw fixed to the base, and a pressure block that is slidably and vertically disposed on the secondary screw and applies downward pressure to the annular adjusting member.

[0012] Furthermore, the clamping mechanism also includes a spring and a nut; the spring is sleeved on the auxiliary screw and provides a continuous elastic downward pressure to the pressure block; the nut is threaded into the auxiliary screw to limit the upward lift of the pressure block.

[0013] Furthermore, the base is provided with a protective cylinder covering the outside of the spring, wherein the auxiliary screw passes through the top of the protective cylinder by the sliding of the pressure block.

[0014] Furthermore, the top of the protective cylinder is provided with an anti-rotation baffle on the outer side of the pressure block.

[0015] Furthermore, a gasket is provided on the base.

[0016] The beneficial effects of the technical solution provided in this application are as follows: 1. This application constructs a universal flange hole sealing system by using an annular adjusting member positioned above the base and multiple sealing actuators slidably connected to the bottom of the circumferentially distributed adjusting holes of the annular adjusting member via connectors. This design overcomes the limitations of traditional technologies that rely on the original bolts or single-size sealing elements of the workpiece, allowing operators to move the sealing actuators flexibly along the adjusting holes simply by tightening or loosening the connectors, thereby precisely adapting to the pitch circle diameter of the flange holes on the front cover of compressors of different specifications; 2. In this application, the independently designed central sealing mechanism, consisting of a main screw and a sealing block, is dedicated to the rapid and reliable sealing of the central shaft hole of the compressor front cover. It works in conjunction with the circumferential flange hole sealing system, with clear division of labor and no interference, together forming a complete end-face sealing solution. Simultaneously, the integrated air vents inside the base internally house the introduction channel for the test medium, allowing immediate connection to an external air source for airtightness testing after the sealing operation is completed. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the universal sealing test structure for the compressor front cover of this utility model; Figure 2 This is a cross-sectional schematic diagram of the universal sealing test structure for the compressor front cover of this utility model; Figure 3 This is a perspective view of the base of this utility model.

[0019] In the diagram: 1. Base, 2. Gasket, 3. Annular adjusting component, 4. Adjusting hole, 5. Sealing actuator, 6. Main screw, 7. Sealing block, 8. Protective cylinder, 9. Secondary screw, 10. Pressure block, 11. Spring, 12. Anti-rotation baffle, 13. Nut, 14. Air hole. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] refer to Figures 1 to 3 The present invention provides a universal sealing test structure for compressor front covers. Its core design concept is to achieve rapid and reliable sealing of compressor front covers of various specifications through a set of flexibly adjustable mechanical structures to meet the requirements of airtightness testing.

[0022] The structure consists of a base 1. This base 1 serves as a stable mounting platform and load-bearing foundation, with its upper surface used to place and support the compressor front cover to be tested. To protect the front cover surface from scratches or abrasions during testing, a gasket 2 is preferably placed on top of the base 1. This gasket 2 is typically made of a softer material such as copper or engineering plastic, and has a central perforation to ensure it does not interfere with the central sealing mechanism described later.

[0023] The core component enabling versatility is an annular adjusting element 3. This annular adjusting element 3 typically consists of a metal ring of a certain width, positioned above the base 1, precisely covering the flange area of ​​the compressor front cover placed on the base 1. Multiple adjusting holes 4 are evenly distributed along the circumference of the annular adjusting element 3. In a preferred embodiment of this invention, these adjusting holes 4 are specifically designed as oblong holes. The oblong structure of the oblong holes provides the internal connecting components with a continuous radial adjustment stroke along the annular adjusting element.

[0024] For each adjusting hole 4, a sealing actuator 5 is provided. In a preferred embodiment of this invention, the sealing actuator 5 is specifically designed as an eccentric sealing block. "Eccentric" means that the geometric center of the working part of the block used to insert and seal the flange hole does not coincide with the mounting center fixed to its upper end by a connector. Each eccentric sealing block 5 is suspended from the bottom of the annular adjusting member 3 by a connector, typically a screw, passing through the oblong hole from above and threadedly connected to it. By loosening this connector, the operator can drive the eccentric sealing block 5 to slide freely along the length of the oblong hole; by rotating the block, its effective sealing diameter can be changed using its eccentric profile. This combination of two degrees of freedom in adjustment allows the same device to precisely adapt to different pitch circle diameters and hole diameters on the flange holes of different compressor front covers, which is the key to the high versatility of this invention.

[0025] To seal the central shaft hole of the compressor front cover, this invention includes an independent central sealing mechanism mounted on the base 1. This mechanism comprises a main screw 6, vertically and fixedly installed at the center of the base 1. During the sealing operation, the central shaft hole of the compressor front cover passes through this main screw 6. A sealing block 7 is threaded onto the outside of the main screw 6. By screwing the sealing block 7 downwards, it can be tightly pressed against the end face of the central shaft hole of the compressor front cover, thus achieving a reliable seal. This central sealing mechanism and the circumferential flange hole sealing system are independent of each other and do not interfere with each other, together forming a complete end face sealing solution.

[0026] To stably press the aforementioned annular adjusting member 3 and its multiple eccentric sealing blocks 5 suspended thereon onto the compressor front cover, this invention provides at least two sets of pressing mechanisms, preferably symmetrically arranged on the base 1 to ensure uniform pressure. The core support of each pressing mechanism is a secondary screw 9 vertically fixed to the base 1. A pressure block 10 is fitted onto the secondary screw 9, and this pressure block 10 can slide and rise along the secondary screw 9. One end of the pressure block 10 extends to and presses against the top of the annular adjusting member 3. Preferably, the shape of the pressure block 10 is "7"-shaped, so that its end contacts the top of the annular adjusting member 3.

[0027] To provide a continuous, stable, and cushioned clamping force, a spring 11 is also fitted onto the secondary screw 9. The bottom of the spring 11 can be supported on the base 1, while its top is firmly abutted against the bottom of the pressure block 10. In this way, the elastic restoring force of the spring 11 will always push the pressure block 10 upward, and the upward displacement of the pressure block 10 is limited by a nut 13 threaded to the top of the secondary screw 9. By tightening the nut 13, the final position of the pressure block 10 can be precisely adjusted and locked, thereby controlling the magnitude of the downward pressure applied to the annular adjusting member 3.

[0028] To protect the spring 11 from external impacts or interference from foreign objects, and to prevent it from bending or jamming due to lateral forces, a protective cylinder 8 is fixedly installed on the base 1. This protective cylinder 8 covers the outside of the spring 11, forming a protective shell. The auxiliary screw 9 and the bottom of the pressure block 10 slide through the top of the protective cylinder 8, ensuring that the lifting and lowering movement of the pressure block 10 is unaffected, while also making the entire structure neater and safer.

[0029] A clever improvement lies in the addition of an anti-rotation baffle 12 at the top of the protective cylinder 8. This baffle 12 is positioned vertically on the outer circumferential side of the pressure block 10. Its design aims to prevent this rotation when the operator tightens the nut 13. The friction between the nut 13 and the pressure block 10, if unobstructed, would cause the pressure block 10 to rotate. This rotation would create harmful friction between the extended end of the pressure block 10 and the annular adjusting member 3. The anti-rotation baffle 12 prevents the pressure block 10 from rotating with the nut 13, as its sidewalls interfere with the baffle 12. This design ensures that the pressure block 10 performs only pure up-and-down linear motion, significantly improving operational smoothness and clamping force stability.

[0030] In addition, to facilitate airtightness testing, an air hole 14 is machined inside the base 1. One end of the air hole 14 leads to the top surface of the base 1 and communicates with the inner cavity of the compressor front cover; the other end extends to the side or bottom surface of the base 1 for connecting to an external test gas nozzle. This integrated design allows for immediate introduction of test gas for testing after all sealing operations are completed, eliminating the need for additional complex piping connections, greatly simplifying the testing process and improving efficiency.

[0031] During use, place the compressor front cover on the gasket 2 and ensure that its central shaft hole passes through the main screw 6. Then, based on the distribution and size of the flange holes on the front cover, pre-adjust the position and angle of each eccentric sealing block 5 in the oblong hole 4. Next, place the annular adjusting piece 3 so that each block 5 is aligned with the corresponding flange hole. Then, press down the pressure block 10 and tighten the nut 13. Under the action of the spring 11, the annular adjusting piece 3 is pressed down evenly, so that the central sealing block 7 and all eccentric sealing blocks 5 can achieve reliable sealing at the same time. Finally, after connecting the air source through the air hole 14, place the fixture that fixes the compressor front cover in a water container to conduct an efficient and accurate airtightness test.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A universal sealing test structure for compressor front cover, characterized in that, It includes a base (1) for placing and supporting the compressor front cover and an annular adjusting member (3) located above the base (1); it also includes multiple sealing actuators (5) and multiple adjusting holes (4) opened on the annular adjusting member (3) and distributed circumferentially, each sealing actuator (5) being slidably connected to the bottom of the adjusting hole (4) by a connector to adapt to sealing flange holes on the compressor front cover at different pitch circle diameters.

2. The universal sealing test structure for the compressor front cover as described in claim 1, characterized in that, The adjustment hole (4) is a waist-shaped hole, and the sealing actuator (5) is an eccentric sealing plug.

3. The universal sealing test structure for the compressor front cover as described in claim 1, characterized in that, It also includes a central sealing mechanism set on the base (1), which includes a main screw (6) fixed on the base (1) and passing through the central shaft hole of the compressor front cover, and a sealing block (7) threaded to the main screw (6) to seal the central shaft hole of the compressor front cover.

4. The universal sealing test structure for the compressor front cover as described in claim 1, characterized in that, The base (1) has an air hole (14) inside, one end of which leads to its top surface and the other end of which leads to its side or bottom surface.

5. The universal sealing test structure for the compressor front cover as described in claim 1, characterized in that, It also includes at least two sets of clamping mechanisms that press the sealing actuator (5) on the annular adjustment member (3) against the front cover of the compressor.

6. The universal sealing test structure for the compressor front cover as described in claim 5, characterized in that, The clamping mechanism includes a secondary screw (9) fixed on the base (1) and a pressure block (10) that is slidably and vertically disposed on the secondary screw (9) and applies downward pressure to the annular adjusting member (3).

7. The universal sealing test structure for the compressor front cover as described in claim 6, characterized in that, The clamping mechanism also includes a spring (11) and a nut (13); the spring (11) is sleeved on the auxiliary screw (9) and provides a continuous elastic downward pressure to the pressure block (10); the nut (13) is threaded into the auxiliary screw (9) to limit the upward lift of the pressure block (10).

8. The universal sealing test structure for the compressor front cover as described in claim 7, characterized in that, The base (1) is provided with a protective cylinder (8) covering the outside of the spring (11), wherein the auxiliary screw (9) slides through the top of the protective cylinder (8) by the pressure block (10).

9. The universal sealing test structure for the compressor front cover as described in claim 8, characterized in that, The top of the protective cylinder (8) is provided with an anti-rotation baffle (12) on the outer side of the pressure block (10).

10. The universal sealing test structure for the compressor front cover as described in claim 1, characterized in that, A gasket (2) is provided on the base (1).

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