An air conditioner compressor casing strength testing device

Abstract

This invention relates to the field of strength testing technology, specifically to a strength testing device for an air conditioner compressor casing, comprising a frame, a fixing unit, a loading unit, and a detection unit. The fixing unit is used to clamp the compressor casing to be tested, and includes a first clamp and a second clamp arranged opposite each other, forming a clamping station. The first or second clamp is connected to a clamping drive mechanism that drives it to move towards the other clamp. The loading unit is used to apply a load to the clamped casing, and includes at least one loading actuator. The output end of the loading actuator has a pressure head pointing towards the area of ​​the casing to be tested. The detection unit is used to acquire deformation information of the casing under load, and includes a non-contact displacement sensor whose detection end faces a preset monitoring point on the casing. This device achieves rapid, non-destructive clamping, multi-directional controllable loading, and high-precision non-contact deformation detection.

Description

Technical Field

[0001] This invention relates to the field of strength testing technology, and specifically to a strength testing device for the outer casing of an air conditioner compressor. Background Technology

[0002] As a critical pressure-bearing component, the structural strength of the compressor housing is directly related to the safety and reliability of the entire compressor. Therefore, it is necessary to conduct rigorous strength tests before it is put into use.

[0003] In existing technologies, devices for strength testing of compressor housings are typically simple in structure. A common existing solution involves fixing the compressor housing to a test bench using bolts, then applying static pressure to the housing from a specific direction using a single hydraulic cylinder, while simultaneously measuring the displacement and deformation of the pressure points using a contact dial indicator.

[0004] The aforementioned existing technical solutions have obvious technical defects. First, the bolt-fixing method is inefficient and may damage the outer casing surface due to improper preload, failing to achieve fast, reliable, and non-destructive clamping. Second, applying the load from a single direction using a single hydraulic cylinder cannot simulate the complex composite stresses from multiple directions experienced by the compressor casing under actual operating conditions, leading to a disconnect between the test results and actual operating conditions, resulting in insufficient reliability.

[0005] Therefore, designing a highly adaptable testing device for the casing strength of an air conditioning compressor that can simulate actual composite stress conditions has become an urgent technical problem to be solved. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention proposes an air conditioner compressor housing strength testing device, aiming to solve the technical problems of poor adaptability of existing testing devices and their inability to simulate complex stress conditions, thereby achieving accurate detection of the air conditioner compressor housing strength.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a compressor housing strength testing device, comprising a frame, a fixing unit mounted on the frame, a loading unit mounted on the frame, and a detection unit. The fixing unit is used to clamp the compressor housing to be tested, the loading unit is used to apply a load to the compressor housing clamped on the fixing unit, and the detection unit is used to acquire deformation information of the compressor housing under the load. The fixing unit includes a first clamp and a second clamp arranged vertically opposite each other, and a clamping station for accommodating the compressor housing is formed between the first clamp and the second clamp. The first clamp or the second clamp is connected to a clamping drive mechanism that drives it to move toward the other clamp. The loading unit includes multiple loading actuators, and the output ends of the multiple loading actuators are arranged circumferentially around the clamping station.

[0008] Furthermore, multiple loading actuators are connected to the same hydraulic power source, which is configured to synchronously drive the output ends of the multiple loading actuators to move.

[0009] In one embodiment, the frame is provided with a guide structure, which includes a corresponding guide rail and a slider adapted thereto, for the loading unit to slide to the corresponding detection position.

[0010] Furthermore, the detection unit includes a non-contact displacement sensor, the detection end of which faces a preset monitoring point on the compressor housing.

[0011] In one embodiment, the non-contact displacement sensor is a laser displacement sensor, which is fixed to the frame by an adjustable mounting bracket.

[0012] Furthermore, the device also includes a control unit, which is signal-connected to the loading unit and the detection unit respectively, for controlling the operation of the loading unit according to a preset program, and receiving and processing deformation information from the detection unit.

[0013] In one implementation, the loading unit is configured to apply a periodically varying pulsating load to the compressor housing.

[0014] The present invention has at least the following beneficial effects: The present invention employs an implementation method in which multiple loading actuators are arranged circumferentially around the clamping station and connected to the same hydraulic power source, enabling the device to apply loads to the compressor housing synchronously or sequentially from multiple directions, thereby accurately simulating the multi-directional complex stress state it experiences in actual operation, and greatly improving the authenticity and reliability of the test.

[0015] This invention, by setting up a fixed unit including a first clamp, a second clamp, and a clamping drive mechanism, can automatically drive the clamps to move towards each other to clamp the compressor housing placed in the clamping station, achieving fast, reliable, and boltless non-destructive clamping, which not only improves clamping efficiency but also effectively protects the surface of the housing.

[0016] This invention employs a non-contact displacement sensor as the core component of the detection unit, completely avoiding physical contact between the measuring probe and the outer casing surface. This eliminates interference from contact measurements, enabling more realistic and accurate acquisition of the casing's deformation information under load. In particular, the high precision and high response speed of a laser displacement sensor are fully utilized. Furthermore, by incorporating a control unit, programmed automatic control of the loading process and automatic acquisition and analysis of deformation data are achieved, improving the automation level and efficiency of the test. Finally, the loading unit's ability to apply periodic pulsating loads allows the device to simulate the fatigue characteristics of a compressor casing under alternating loads, further expanding the test's coverage and practicality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the upper ring frame and the structure below in this invention; The attached figures are labeled as follows: 100, Frame; 110, Top plate; 120, Base plate; 130, Column; 140, Upper ring frame; 150, Lower ring frame; 160, First guide rail; 170, Second guide rail; 200, Sliding frame; 300, Clamping drive mechanism; 310, First clamp; 400, Second clamp; 410, Base; 500, Loading actuator; 600, Detection unit; 610, Slide bar; 700, Control unit. Detailed Implementation

[0018] The technical solutions in the embodiments of the present invention will be further described in detail below with reference to the embodiments of the present invention.

[0019] The strength of the compressor casing directly affects the safe operation of the compressor, making accurate and efficient strength testing crucial. This invention provides a compressor casing strength testing device that can simulate the complex stresses the casing experiences under actual operating conditions and perform high-precision deformation measurements, thereby effectively evaluating its structural reliability.

[0020] like Figures 1 to 2As shown, the compressor housing strength testing device includes a frame 100, a fixing unit, a loading unit, and a testing unit 600. The fixing unit, loading unit, and testing unit 600 are all mounted on the frame 100. The frame 100 includes a top plate 110 and a bottom plate 120. Multiple evenly distributed columns 130 are provided between the top plate 110 and the bottom plate 120. An upper ring frame 140 and a lower ring frame 150 are respectively fixedly mounted on opposite sides of the top plate 110 and the bottom plate 120. Multiple sliding frames 200, centered on the central axis of the frame 100, are slidably mounted between the upper ring frame 140 and the lower ring frame 150 for mounting the loading unit.

[0021] The fixing unit is used to clamp the compressor housing under test, the loading unit is used to apply a load to the clamped compressor housing, and the detection unit 600 is used to acquire the deformation information of the compressor housing under load in a non-contact manner. Through the coordinated work of the above units, a fully automated or semi-automated testing process from rapid clamping and multi-directional loading to high-precision detection is realized, solving the problems of low clamping efficiency, single loading mode, and large measurement interference in the existing technology.

[0022] In this embodiment, the fixing unit includes a first clamp 310 and a second clamp 400 disposed opposite to each other. A clamping station for accommodating the compressor housing is formed between the first clamp 310 and the second clamp 400. Specifically, the first clamp 310 can serve as the upper clamp, and the second clamp 400 can serve as the lower clamp, with the compressor housing to be tested placed on the lower clamp. The first clamp 310 or the second clamp 400 is connected to a clamping drive mechanism 300 that drives it to move toward the other clamp. The lower clamp is detachably mounted on the base 410.

[0023] like Figure 1 As shown, the clamping drive mechanism 300 can drive the upper clamp to move downwards, cooperating with the fixed lower clamp to quickly and securely clamp the compressor housing in the mounting position. This clamping method avoids the use of bolt connections, achieving non-destructive and efficient clamping. The clamping drive mechanism 300 can be an electric actuator or a hydraulic cylinder.

[0024] The frame 100 is provided with a guide structure, which includes corresponding guide rails and matching sliders for the loading unit to slide to the corresponding detection position. In this embodiment, the loading unit includes at least one loading actuator 500 that is slidably mounted on a corresponding sliding frame 200 to facilitate adjustment of the loading pressure position. The upper ring frame 140 and the lower ring frame 150 are provided with first guide rails 160. The top and bottom of the sliding frame 200 are provided with first sliders and their locking bolts that are adapted to the first guide rails 160. The sliding frame 200 is provided with a second guide rail 170. The base of the loading actuator 500 is provided with a second slider and its locking bolt that are adapted to the second guide rail 170.

[0025] The load actuator 500 has a pressure head at its output end, which is located on one side of the clamping station and points towards the area to be tested on the compressor housing. The load actuator 500 can be a hydraulic cylinder or an electric servo actuator. By driving the load actuator 500, the pressure head at its output end can apply a precise and controllable force to a specific part of the compressor housing, thereby simulating the load under actual working conditions.

[0026] Furthermore, the loading unit may include multiple loading actuators 500. The output ends of the multiple loading actuators 500 are arranged circumferentially around the clamping station. Six loading actuators 500 can be set, namely the first loading actuator 500 to the sixth loading actuator 500, which point towards the compressor housing at the center of the clamping station from different directions. This arrangement allows loads to be applied to the compressor housing simultaneously or sequentially from multiple directions, thereby more realistically simulating the complex multi-directional stress state it experiences during use, significantly improving the comprehensiveness and accuracy of the test.

[0027] More specifically, multiple loading actuators 500 can be connected to the same hydraulic power source. The hydraulic power source is configured to synchronously drive the output movements of the multiple loading actuators 500. The hydraulic power source typically includes a hydraulic pump, oil tank, control valve assembly, and piping. Through a unified hydraulic control system, the force and displacement output by the multiple loading actuators 500 can be ensured to be highly synchronized, achieving uniform or proportional multi-point synchronous loading of the compressor housing, which is crucial for evaluating the overall structural response of the housing.

[0028] In this embodiment, the detection unit 600 includes a non-contact displacement sensor. The probe of the non-contact displacement sensor faces a preset monitoring point on the compressor housing, such as the location where the deformation is expected to be the greatest or a critical stress point. Non-contact measurement completely avoids physical contact between the sensor probe and the housing surface, thereby eliminating the interference that contact measurement may cause to the deformation of the specimen, and enabling the acquisition of more realistic and accurate deformation data.

[0029] In a preferred embodiment, the non-contact displacement sensor is a laser displacement sensor. The laser displacement sensor is fixed to the frame 100 by an adjustable mounting bracket assembly, specifically including a slide rod 610, and the laser displacement sensor is provided with a corresponding slide base and its locking bolt assembly.

[0030] Laser displacement sensors offer advantages such as high measurement accuracy, fast response speed, and high resolution. The adjustable mounting bracket assembly allows operators to easily and accurately align the laser beam with different preset monitoring points on the compressor casing, improving the device's flexibility and applicability.

[0031] In this embodiment, the compressor housing strength testing device also includes a control unit 700. The control unit 700 is signal-connected to both the loading unit and the detection unit 600. The control unit 700 controls the operation of the loading unit according to a preset program, for example, controlling the start / stop of the hydraulic power source, the loading force, loading speed, and loading waveform of the loading actuator 500, and receiving and processing deformation information from the detection unit 600. The control unit 700 typically includes a processor, a memory, an input / output interface circuit, and a human-machine interface. The processor can be an industrial computer or a PLC, and the human-machine interface can be a touchscreen. The processor executes the control program stored in the memory, sends control signals to the control valve group of the hydraulic power source through the interface circuit to drive the loading actuator 500; simultaneously, it receives deformation data from the laser displacement sensor through the interface circuit and performs real-time display, recording, and analysis, such as plotting force-displacement curves and calculating stiffness, thereby achieving automation and intelligence in the testing process.

[0032] Furthermore, the loading unit can be configured to apply a periodically varying pulsating load to the compressor housing. This can be achieved through programming the control unit 700, causing the hydraulic power source to drive the loading actuator 500 to reciprocate periodically according to specific waveforms such as sine waves and square waves. Applying a pulsating load can simulate the alternating stress experienced by the compressor housing during start-up, shutdown, or variable operating conditions, thereby conducting fatigue strength tests on the compressor housing and further expanding the functionality of this device.

[0033] The terms "upper," "lower," "outer," "inner," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish relative positional relationships and are not necessarily qualitative. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A testing device for the strength of an air conditioner compressor casing, characterized in that: The device includes a frame, a fixing unit mounted on the frame, a loading unit mounted on the frame, and a detection unit. The fixing unit is used to clamp the housing of the compressor under test, the loading unit is used to apply a load to the compressor housing clamped on the fixing unit, and the detection unit is used to acquire deformation information of the compressor housing under the load. The fixing unit includes a first clamp and a second clamp arranged vertically opposite each other, and a clamping station for accommodating the compressor housing is formed between the first clamp and the second clamp. The first clamp or the second clamp is connected to a clamping drive mechanism that drives it to move toward the other clamp. The loading unit includes multiple loading actuators, and the output ends of the multiple loading actuators are arranged circumferentially around the clamping station.

2. The air conditioner compressor housing strength testing device as described in claim 1, characterized in that: Multiple loading actuators are connected to the same hydraulic power source, which is configured to synchronously drive the output ends of the multiple loading actuators.

3. The air conditioner compressor housing strength testing device as described in claim 1, characterized in that: The frame is equipped with a guide structure, which includes a corresponding guide rail and a matching slider, for the loading unit to slide to the corresponding detection position.

4. The air conditioner compressor housing strength testing device as described in claim 1, characterized in that: The detection unit includes a non-contact displacement sensor, the detection end of which faces a preset monitoring point on the compressor housing.

5. The air conditioner compressor housing strength testing device as described in claim 4, characterized in that: The non-contact displacement sensor is a laser displacement sensor, which is fixed on the frame by an adjustable mounting bracket.

6. The air conditioner compressor housing strength testing device as described in claim 1, characterized in that: It also includes a control unit, which is signal-connected to the loading unit and the detection unit respectively, and is used to control the operation of the loading unit according to a preset program, and to receive and process deformation information from the detection unit.

7. The air conditioner compressor housing strength testing device as described in any one of claims 1 to 6, characterized in that: The loading unit is configured to apply a periodically varying pulsating load to the compressor housing.

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