Sliding vane friction dynamics test method and test board for simulating real working condition of air conditioner compressor

Abstract

The invention provides a slip sheet friction dynamics test method for simulating the real working condition of an air conditioner compressor, the existing structure of the compressor is reserved, an original slip sheet is replaced by a self-designed slip sheet, and the self-designed slip sheet and the original slip sheet conform to the dynamics equivalence principle. A labyrinth seal is arranged between the self-designed sliding sheet and a sliding groove of a compressor cavity to realize sealing and keep friction-free, an exposed section of the self-designed sliding sheet is used as a test section, a self-designed sliding groove defined by a pair of sliding sheet clamping blocks is configured by imitating an original sliding groove as the test section, and the pair of sliding sheet clamping blocks can slide; an eddy current displacement sensor, an S-shaped pressure sensor, a sheet thermocouple sensor, a thin film pressure sensor, a miniature temperature sensor, a piezoresistive absolute pressure sensor and a high-speed camera are configured for friction testing. According to the invention, the measurement of the tribological characteristics of the slip sheet and the second-order motion characteristics in the vertical motion direction in the reciprocating motion process can be realized, the precision is higher, and the method has an important value for the development of low-friction noise compressors.

Description

Technical Field

[0001] The present invention relates to the technical field of detection of the friction performance of sliding vanes in refrigeration compressors, and more specifically, to a sliding vane friction dynamics test bench that simulates the actual working conditions of air-conditioning compressors. Background Art

[0002] As one of the core devices in air-conditioning refrigeration equipment, with the cooperation of refrigerant, the air-conditioning refrigeration compressor can provide good refrigeration effect. The air-conditioning compressor mainly adopts the rotary type in the positive displacement type, also known as the rolling piston compressor. The sliding vane in contact with the roller is the key. The main function of the sliding vane is to realize the compression and release of gas through its movement, so as to complete the core function of the compressor - driving the flow of refrigerant and achieving the refrigeration purpose through heat-work conversion. This is the basic prototype of the present invention. However, the special structure of such a system will cause friction and wear problems. In fact, a large amount of friction loss will occur between the sliding vane and the sliding groove. Therefore, the primary task is to study the mechanical behavior of the sliding vane movement in the compressor and the friction characteristics in the moving pair.

[0003] One of the existing test methods at present is to rely on the long-term use of the sliding vane, and collect the wear problem of the sliding vane through the long-term change of the sliding vane. However, this method has a long time cycle. Measuring the wear of the sliding vane by this method requires the disassembly and assembly of the compressor at long-term and irregular times. The process is relatively cumbersome, consuming manpower and material resources, and it is impossible to collect instant data at all times, as well as collect the dynamic friction force change and microscopic wear.

[0004] The second testing method is to conduct tests through an open roller vane test device, which can quantitatively study the changes generated by the vane during movement. If both the vane and the chute are smooth and always parallel to each other, then theoretically, when neither of them bears extrusion pressure during operation, it is impossible to generate a hydrodynamic pressure effect. However, this situation is too ideal. In fact, the vane will exhibit changes following the tilting and swinging behavior of the rotor. Due to the gap between the vane and the chute, the vane will not only reciprocate along the chute but also perform translational motion perpendicular to the chute and rotational motion around the contact position of the sliding end. This behavior is called second-order motion with two additional degrees of freedom. Obviously, the second-order motion of the vane complicates the lubrication state between the vane and the chute, and such a device belongs to an open type. The open type device simulates the changes of the vane in the chute through the movement of the roller on the vane. This method does not consider the unbalanced pressure that the vane will receive in the compressor, nor does it consider the influence of the refrigerant participating in the interaction with the lubricating oil on the vane. Relatively few conditional factors are considered during the movement process. Although some test data can still be obtained, it still cannot fully simulate the real working conditions of the compressor and cannot more accurately simulate the changing behavior of the vane in the compressor. At the same time, for the open test device, since the vane is clamped, there is a certain test risk.

[0005] In summary, the existing test devices are still difficult to accurately simulate and measure the exact changes in the movement of the vane in the chute of the compressor. Few factors are considered, and it is impossible to simulate the movement changes of the vane under low temperature and high pressure and under the action of the refrigerant. Therefore, it is necessary to redesign the test device, re-consider various factors in the design scheme, and re-propose a test device that conforms to the actual working conditions. Summary of the Invention

[0006] To solve the above technical problems, the present invention proposes a vane friction dynamics method for simulating the real working conditions of an air conditioner compressor and a test bench for implementing this test method. It can measure the tribological characteristics of the vane and the second-order motion characteristics in the direction perpendicular to the movement during the reciprocating movement process, can more completely reproduce real problems, has higher accuracy, and has important value for the development of low-friction and low-noise compressors.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A sliding vane friction dynamics test method for simulating the real working conditions of an air-conditioning compressor, which is used for testing the sliding vane friction performance of a rolling piston compressor. While retaining the existing structure of the compressor, a self-designed sliding vane is used to replace the original sliding vane. The self-designed sliding vane has the same material and equal mass as the original sliding vane, retains the shape of the original sliding vane, and is longer than the original sliding vane, and can penetrate the chute in the compressor cavity and be exposed. A labyrinth seal is set at the chute to achieve sealing and keep no friction with the self-designed sliding vane. Using the exposed section of the self-designed sliding vane as the test section, the sliding vane friction performance test is transferred outside the compressor cavity. A self-designed chute surrounded by a pair of sliding vane clamping blocks is configured for the test section according to the original chute. The pair of sliding vane clamping blocks are respectively slidably installed on a pair of air-floating slide rails, so that when the pair of sliding vane clamping blocks are affected by the frictional force between the sliding vanes, they can smoothly displace along the sliding vane movement direction. The end of the test section is tensioned by the original spring; the self-designed sliding vane keeps in contact with the roller of the crankshaft that can rotate in the compressor cavity, generating a reciprocating linear displacement in the self-designed chute. During the process:

[0009] Use at least two eddy current displacement sensors to obtain the second-order motion parameters of the self-designed sliding vane;

[0010] Use a pair of S-type pressure sensors to obtain the friction force parameters generated by the self-designed sliding vane;

[0011] Use at least one sheet thermocouple sensor to obtain the friction temperature parameters of the self-designed sliding vane;

[0012] Use several thin film pressure sensors to detect whether the self-designed sliding vane and the crankshaft roller are separated;

[0013] Use several micro temperature sensors and piezoresistive absolute pressure sensors to obtain the pressure and temperature parameters in the compressor cavity;

[0014] Use an external high-speed camera to obtain the motion image of the self-designed sliding vane.

[0015] Further, in the sliding vane friction dynamics test method for simulating the real working conditions of an air-conditioning compressor: set the distance between a pair of eddy current displacement sensors along the displacement direction of the self-designed sliding vane as L, and the displacement monitoring quantity of the pair of eddy current displacement sensors is the distance value from the detection end to the surface of the test section. Before the test starts, the pair of eddy current displacement sensors are set to zero. During the test, the real-time displacement monitoring quantities Z1 and Z2 of the pair of eddy current displacement sensors are used to calculate the deflection angle of the self-designed sliding vane to obtain the second-order motion parameters of the self-designed sliding vane.

[0016] The present invention also proposes a sliding vane friction dynamics test bench for simulating the real working conditions of an air-conditioning compressor, which is used to implement the above-mentioned sliding vane friction dynamics test method for simulating the real working conditions of an air-conditioning compressor, including:

[0017] A support component for placing the test component;

[0018] The test assembly includes a rolling piston compressor and a servo motor for driving the crankshaft to rotate. The rolling piston compressor is arranged on the support assembly with the crankshaft horizontally placed and the slide groove facing upward. The crankshaft is coaxially connected to the output shaft of the servo motor lying on the support assembly. A self-designed slide with the same material and quality as the original slide, retaining the appearance of the original slide and longer than the original slide is arranged to replace the original slide and pass through the slide groove. One end extends into the compressor cavity to keep contact and cooperate with the roller on the crankshaft. The part exposed outside the compressor cavity is used as a test section. A labyrinth seal is arranged at the slide groove. The labyrinth seal is used to achieve sealing and keep frictionless with the self-designed slide. According to the slide groove structure, a self-designed slide groove surrounded by a pair of slide clamps is configured for the test section. The pair of slide clamps are respectively arranged on a pair of air-floating slide rails. When subjected to the friction between the test section and the self-designed slide, the slide can slide through a pair of air-floating slide rails along the displacement direction parallel to the self-designed slide. The test section passes through the self-designed slide groove, and the end is tensioned by the original spring.

[0019] The detection component includes a pair of eddy current displacement sensors for obtaining the second-order motion parameters of the self-designed sliding vane, a pair of S-shaped pressure sensors for obtaining the friction force parameters between the self-designed sliding vane and the self-designed sliding groove, a sheet thermocouple sensor for obtaining the friction temperature parameters of the self-designed sliding vane, a thin film pressure sensor for judging whether the self-designed sliding vane is separated from the crankshaft roller, and a micro temperature sensor and a piezoresistive absolute pressure sensor for obtaining the pressure and temperature parameters in the compressor cavity;

[0020] The camera device is used to obtain the motion image of the test section.

[0021] The structural features of the sliding vane friction dynamics test bench that simulates the actual working conditions of the air-conditioning compressor are also:

[0022] Taking the displacement direction of the self-designed sliding piece as the up and down direction, in the detection component:

[0023] A pair of eddy current displacement sensors are embedded in one of the sliding plate clamps and spaced apart in the up-down direction, with the detection end facing the surface of the test section on the side with a reserved spacing. The displacement monitoring amount is the real-time spacing value between the detection end and the surface of the test section.

[0024] A pair of S-shaped pressure sensors are symmetrically arranged in the left-right direction just above a pair of sliding plate clamps, with the detection ends facing downwards and connected to the pair of sliding plate clamps respectively, and the other ends are connected to the support assembly, and the friction force parameters generated by the self-designed sliding plate are obtained by detecting the force of the pair of sliding plate clamps;

[0025] The sheet-shaped thermocouple sensor is embedded in one of the sliding plate clamps, and the detection end is close to the surface of the test section on the side;

[0026] The thin-film pressure sensors are provided in two places. One is centered and embedded along the length direction of the self-designed sliding vane in the self-designed sliding vane, which is the first thin-film pressure sensor. The other is embedded at the end of the self-designed sliding vane inside the compressor cavity, arranged along the wide side, curved in an arc shape, and convex towards the crankshaft roller, which is the second thin-film pressure sensor. The first thin-film pressure sensor and the second thin-film pressure sensor are distributed in an "L" shape and are in contact at the intersection.

[0027] A number of micro temperature sensors and a number of piezoresistive absolute pressure sensors are embedded in the compressor cavity wall, respectively distributed at intervals around the crankshaft axis, for obtaining the temperature and pressure parameters in the compressor cavity.

[0028] The imaging device is an external high-speed camera.

[0029] The support assembly includes a vibration isolation table and a base set on the vibration isolation table. The test assembly is installed on the base, and vibration isolation is carried out through the vibration isolation table during the test.

[0030] There are multiple uniformly distributed openings in the test section.

[0031] The compressor housing is reserved with a cavity refrigerant inlet and a cavity refrigerant outlet communicating with the compressor inner cavity. The cavity refrigerant inlet and the cavity refrigerant outlet can be externally connected to pipelines respectively for the injection and discharge of refrigerant.

[0032] A protective cover made of transparent acrylic board is set to cover the entire test bench. The protective cover is provided with a cover body refrigerant inlet and a cover body refrigerant outlet for the pipeline for transporting refrigerant to pass through.

[0033] The labyrinth seal is a stepped groove type labyrinth seal piece.

[0034] Compared with the prior art, the beneficial effects of the present invention are reflected in:

[0035] 1. In order to make the self-designed sliding vane and the self-designed sliding groove simulated by a pair of sliding vane clamps more conform to the actual working conditions, the present invention proposes a new sealing mode and a sliding vane dynamics equivalent method, that is, the labyrinth seal and the customized self-designed sliding vane. Attaching the labyrinth seal to the sliding groove of the original compressor cavity can make the sliding groove on the original cavity in a frictionless state. This method can avoid the area contact between the self-designed sliding vane and the original cavity sliding groove from affecting the true test results. The self-designed sliding vane is set to have the same material and equal mass as the original sliding vane, retain the shape of the original sliding vane, be longer than the original sliding vane in length, and have openings in the test section for dynamic equivalence to simulate the motion characteristics of the original sliding vane and ensure the authenticity of the test results.

[0036] 2. The test device and test cavity adopted in the present invention are mature product structures. On this basis, customization and improvement are carried out to ensure that the components of the test device are all in line with the actual situation. The built test device can well conform to the actual working conditions, can completely reproduce real problems, and the principle of building the test device is simple and highly feasible, being more accurate than traditional test devices.

[0037] 3. The present invention can continuously detect the pressure and temperature changes in the compressor cavity to adjust and supplement the test environment, and can detect whether the self-designed sliding vane has lateral second-order movement and whether it loses power by separating from the rotating roller through an eddy current displacement sensor and a thin-film pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is the structural schematic diagram of the present invention;

[0039] Figure 2 is the schematic diagram of the internal structure of the compressor;

[0040] Figure 3 is the side view structural schematic diagram of the present invention;

[0041] Figure 4 is the structural schematic diagram of the self-designed sliding vane;

[0042] Figure 5 is Figure 4 the sectional view structural schematic diagram in the A-A direction of

[0043] Figure 6 is the partial enlarged structural schematic diagram of the labyrinth seal at the chute;

[0044] Figure 7 is the schematic diagram of the second-order motion characteristic test principle.

[0045] In the figures:

[0046] 1 Compressor; 12 Crankshaft; 13 Roller; 14 Cavity refrigerant inlet; 15 Cavity refrigerant outlet; 16 Original spring; 2 Servo motor; 3 Labyrinth seal; 4 Self-designed sliding vane; 5 Sliding vane clamping block; 6 Air-floating slide rail; 71 Eddy current displacement sensor; 72 S-type pressure sensor; 73 Sheet thermocouple sensor; 74 First thin-film pressure sensor; 75 Second thin-film pressure sensor; 76 Micro temperature sensor; 77 Piezoresistive absolute pressure sensor; 8 High-speed camera; 91 Vibration isolation table; 92 Base; 93 Main baffle; 94 Side baffle; 10 Protective cover. DETAILED DESCRIPTION OF THE INVENTION

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the 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 shall fall within the protection scope of the present invention.

[0048] Please refer to Figures 1 to 7 , the sliding vane friction dynamics test method for simulating the actual working conditions of the vane of the air-conditioning compressor 1 in this embodiment is used for testing the sliding vane friction performance of the rolling piston compressor 1. The existing structure of the compressor 1 is retained, and a self-designed vane 4 is used to replace the original vane. The self-designed vane 4 is made of the same material and has the same mass as the original vane. The outer shape of the original vane is retained, and the length is longer than that of the original vane, and it can penetrate the chute in the cavity of the compressor 1 and be exposed. A labyrinth seal 3 is provided at the chute to achieve sealing and keep no friction with the self-designed vane 4, which will not affect the progress of the test and the acquisition of test results. The exposed section of the self-designed vane 4 is used as the test section, and the sliding vane friction performance test is transferred outside the cavity of the compressor 1. A self-designed chute surrounded by a pair of vane clamping blocks 5 is configured for the test section by imitating the relative position relationship between the original chute and the original vane and the outer shape of the contact surface with the original vane. The pair of vane clamping blocks 5 are respectively slidably installed on a pair of air-floating slide rails 6, so that when the pair of vane clamping blocks 5 are affected by the frictional force between the vanes, they can smoothly displace along the movement direction of the vane. The end of the test section is tensioned by the original spring 16; the self-designed vane 4 keeps in contact with the roller 13 of the crankshaft 12 that can rotate in the cavity of the compressor 1, generating a reciprocating linear displacement in the self-designed chute. During the process:

[0049] At least two eddy current displacement sensors 71 are used to obtain the second-order motion parameters of the self-designed vane 4;

[0050] A pair of S-type pressure sensors 72 are used to obtain the frictional force parameters generated by the self-designed vane 4;

[0051] At least one sheet thermocouple sensor 73 is used to obtain the friction temperature parameters of the self-designed vane 4;

[0052] A number of thin-film pressure sensors are used to detect whether the self-designed vane 4 is separated from the roller 13 of the crankshaft 12;

[0053] A number of micro temperature sensors 76 and piezoresistive absolute pressure sensors 77 are used to obtain the pressure and temperature parameters in the cavity of the compressor 1;

[0054] An external high-speed camera 8 is used to obtain the motion image of the self-designed vane 4.

[0055] In the sliding vane friction dynamics test method for simulating the actual working conditions of the analog air-conditioning compressor 1: The distance between a pair of eddy current displacement sensors 71 along the displacement direction of the self-designed vane 4 is set as L. The displacement monitoring quantities of the pair of eddy current displacement sensors 71 are the distance values from the detection end to the surface of the test section. Before the test starts, the pair of eddy current displacement sensors 71 are set to zero. During the test, the real-time displacement monitoring quantities Z1 and Z2 of the pair of eddy current displacement sensors 71 are used to calculate the deflection angle of the self-designed vane 4, so as to obtain the second-order motion parameters of the self-designed vane 4.

[0056] Using the obtained second-order motion parameters, friction force parameters, friction temperature parameters, the inner cavity pressure and temperature parameters of the compressor 1, motion images, and the known spring coefficient, it can be used to calculate and statistically analyze the losses generated by the self-designed vane 4 during the friction process and the frequency changes generated.

[0057] This embodiment also proposes a sliding vane friction dynamics test bench for simulating the actual working conditions of the air-conditioning compressor 1, which is used to implement the above-mentioned sliding vane friction dynamics test method for simulating the actual working conditions of the air-conditioning compressor 1. The test bench includes:

[0058] A support assembly for placing the test assembly;

[0059] A test assembly, including a rolling piston compressor 1 and a servo motor 2 for driving the crankshaft 12 to rotate. The rolling piston compressor 1 is arranged on the support assembly with the crankshaft 12 horizontally placed and the chute facing upwards. The crankshaft 12 is coaxially connected to the output shaft of the servo motor 2 lying horizontally on the support assembly, and the sliding vane friction test experiment under different rotational speed conditions is realized by using the servo motor 2; A self-designed vane 4 with the same material, equal mass, retaining the original vane shape, and longer length than the original vane is set, replacing the original vane to penetrate the chute. One end extends into the cavity of the compressor 1 and keeps contact fit with the roller 13 on the crankshaft 12. The part exposed outside the cavity of the compressor 1 is used as the test section. A labyrinth seal 3 is arranged at the chute. Sealing is realized through the labyrinth seal 3 and there is no friction with the self-designed vane 4. According to the chute structure, a self-designed chute surrounded by a pair of vane clamping blocks 5 is configured for the test section. The pair of vane clamping blocks 5 are respectively arranged on a pair of air-floating slide rails 6 and can slide along the displacement direction parallel to the self-designed vane 4 through the pair of air-floating slide rails 6 when affected by the friction force with the test section. The test section penetrates the self-designed chute and the end is tensioned by the original spring 16;

[0060] The detection component includes a pair of eddy current displacement sensors 71 for obtaining the second-order motion parameters of the self-designed sliding vane 4, a pair of S-type pressure sensors 72 for obtaining the friction force parameters between the self-designed sliding vane 4 and the self-designed sliding groove, a sheet thermocouple sensor 73 for obtaining the friction temperature parameters of the self-designed sliding vane 4, a thin film pressure sensor for determining whether the self-designed sliding vane 4 is separated from the roller 13 of the crankshaft 12, a micro temperature sensor 76 and a piezoresistive absolute pressure sensor 77 for obtaining the pressure and temperature parameters in the cavity of the compressor 1;

[0061] The imaging device is used to obtain the motion images of the test section.

[0062] In the specific implementation, the corresponding structural settings of the sliding vane friction dynamics test bench for simulating the actual working conditions of the air-conditioning compressor 1 also include:

[0063] Set up test collection instruments, which are respectively connected to the S-type pressure sensor 72, the sheet thermocouple sensor 73, the eddy current displacement sensor 71, the micro temperature sensor 76 and the piezoresistive absolute pressure sensor 77, and then connected to the computer to collect and count the test data.

[0064] Taking the displacement direction of the self-designed sliding vane 4 as the up and down direction, in the detection component:

[0065] A pair of eddy current displacement sensors 71 are embedded in one of the sliding vane clamps 5, spaced along the up and down direction, and the detection ends are facing the surface of the test section on the corresponding side with a reserved distance, and the displacement monitoring quantity is the real-time distance value between the detection end and the surface of the test section;

[0066] A pair of S-type pressure sensors 72 are symmetrically arranged in the left and right directions directly above the pair of sliding vane clamps 5, the detection ends face down and are respectively connected to the pair of sliding vane clamps 5, and the other ends are connected to the support component, and the friction force parameters generated by the self-designed sliding vane 4 are obtained by detecting the forces on the pair of sliding vane clamps 5;

[0067] The sheet thermocouple sensor 73 is embedded in one of the sliding vane clamps 5, and the detection end is close to the surface of the test section on the corresponding side;

[0068] There are two thin film pressure sensors; one is embedded in the self-designed sliding vane 4 in the middle along the length direction of the self-designed sliding vane 4, which is the first thin film pressure sensor 74, and the other is embedded in the end of the self-designed sliding vane 4 on the inner side of the cavity of the compressor 1, arranged along the wide side, curved in an arc shape, and protruding towards the outside of the roller 13 of the crankshaft 12, which is the second thin film pressure sensor 75; the first thin film pressure sensor 74 and the second thin film pressure sensor 75 are distributed in an "L" shape, and the intersection points are in contact;

[0069] A number of micro temperature sensors 76 and a number of piezoresistive absolute pressure sensors 77 are embedded in the cavity wall of the compressor 1, and are distributed at intervals around the central axis of the crankshaft 12, for obtaining the temperature and pressure parameters in the cavity of the compressor 1.

[0070] The imaging device is an external high-speed camera 8.

[0071] The support assembly includes a vibration isolation table 91 and a base 92 arranged on the vibration isolation table 91. The test assembly is installed on the base 92, and vibration isolation is carried out through the vibration isolation table 91 during the test. A cavity is provided on the base 92, and the servo motor 2 is built therein. A circular groove is bored on the outer wall of the cavity for installing the sealing cavity base of the compressor 1. A main baffle 93 for fixing the spring is provided on the upper part of the outer wall of the cavity, and a side baffle 94 for installing a pair of air-floating slide rails 6 is also provided. The upper end of the S-type pressure sensor 72 is connected to the main baffle 93. The moving member on the air-floating slide rail 6 is connected to the slide block clamp 5, and the movement of the self-designed slide 4 in the chute is simulated by using a pair of slide block clamps 5 to assist in measuring the friction force.

[0072] To make the mass of the self-designed slide 4 equal to that of the original slide, a number of uniformly distributed openings are provided in the test section of the self-designed slide 4, and the end in contact with the roller 13 is thinned.

[0073] The compressor 1 housing is reserved with a cavity refrigerant inlet 14 and a cavity refrigerant outlet 15 communicating with the inner cavity of the compressor 1. The cavity refrigerant inlet 14 and the cavity refrigerant outlet 15 can be externally connected with pipes respectively for the injection and discharge of refrigerant. Thus, the high and low pressure effects can be ensured through the sealed cavity of the compressor 1, and the test under the refrigerant working condition can be realized by injecting refrigerant into the inner cavity of the compressor 1, further making the test more in line with the actual situation, expanding the test range, and obtaining more types of test results.

[0074] A protective cover 10 made of transparent acrylic board is provided to cover the whole test bench. The protective cover 10 is provided with a cover body refrigerant inlet and a cover body refrigerant outlet for the pipes for transporting refrigerant to pass through. The protective cover 10 can be reserved with air holes for externally connecting an air pump, and the leaked gas can be discharged by using the air pump during the test.

[0075] The labyrinth seal 3 is a stepped groove type labyrinth seal piece, which can minimize the leakage generated during the movement of the compressor 1. The leaked fluid flows and spirals repeatedly in the labyrinth, which not only prevents the leakage, but also uses the lubricating fluid flowing and spiraling in the labyrinth to avoid friction. Due to its small contact surface and groove shape, it promotes the generation of the working condition of the simulated real compressor 1. The two seal pieces are respectively placed on both sides of the chute, replacing the original chute wall, to avoid and offset the friction force theoretically generated by the self-designed slide 4, and then achieve the effect of frictionless, promoting the implementation of the subsequent friction test.

[0076] The present invention successfully solves the problem of incomplete consideration factors in the transmission sliding vane test device, proposes a brand-new working condition environment simulation, and then conducts more accurate tests on the sliding vane to obtain more actual test data. Through real test simulations, it is possible to more accurately obtain the subtle changes generated when the sliding vane reciprocates in the chute of the refrigeration compressor 1, thereby enabling more clearly corresponding solutions to be proposed for the problems generated. The sheet thermocouple sensor 73, the eddy current displacement sensor 71, and the S-type pressure sensor 72 connected to the sliding vane clamp 5 can measure the friction force and temperature generated during the reciprocating movement of the sliding vane. At the same time, considering the deformation of the spring, the micro high-precision temperature sensor and the piezoresistive absolute pressure sensor 77 obtain the temperature and pressure inside the compressor 1 cavity, and the thin-film pressure sensor obtains whether the sliding vane disengages from the roller 13. The loss and frequency are calculated through the obtained test data. The labyrinth seal 3 proposed by the present invention can reduce the leakage of pressure through the control of air flow, and at the same time ensures the generation of unnecessary friction. At the same time, a servo motor 2 is equipped on the crankshaft 12 in the compressor 1, and a cold source inlet and outlet are added to this device, enabling the acquisition of test data in a larger range. The present invention is a method for testing the friction of the sliding vane in the compressor 1 under highly simulated real working conditions, and has much higher accuracy compared to the traditional open test method. It is suitable for testing the operation of the sliding vane under different refrigerants at low temperatures, and has important value for the development of compressors 1 to reduce costs.

[0077] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A sliding vane friction dynamics test method for simulating the actual working conditions of an air-conditioning compressor, characterized in that For the sliding vane friction performance test of a rolling piston compressor, while retaining the existing structure of the compressor, a self-designed vane is used to replace the original vane. The self-designed vane is made of the same material and has the same mass as the original vane, retains the shape of the original vane, and is longer than the original vane, and can be exposed through the chute of the compressor cavity. The chute is sealed by setting a labyrinth seal and maintains no friction with the self-designed vane. The exposed section of the self-designed vane is used as the test section, and the sliding vane friction performance test is transferred outside the compressor cavity. A self-designed chute surrounded by a pair of vane clamping blocks is configured for the test section by imitating the original chute. The pair of vane clamping blocks are respectively slidably mounted on a pair of air-floating slide rails, so that when the pair of vane clamping blocks are affected by the frictional force between the vanes, they can smoothly displace along the movement direction of the vanes. The end of the test section is tensioned by the original spring; the self-designed vane is kept in contact with the roller of the rotatable crankshaft in the compressor cavity to generate a reciprocating linear displacement in the self-designed chute. During the process: At least two eddy current displacement sensors are used to obtain the second-order motion parameters of the self-designed vane; A pair of S-type pressure sensors are used to obtain the friction force parameters generated by the self-designed vane; At least one sheet thermocouple sensor is used to obtain the friction temperature parameters of the self-designed vane; Several thin film pressure sensors are used to detect whether the self-designed vane is separated from the crankshaft roller; Several micro temperature sensors and piezoresistive absolute pressure sensors are used to obtain the pressure and temperature parameters in the compressor cavity; An external high-speed camera is used to obtain the motion image of the self-designed vane.

2. The method for testing the sliding vane friction dynamics simulating the actual working conditions of an air-conditioning compressor according to claim 1, wherein: Set the distance between a pair of eddy current displacement sensors along the displacement direction of the self-designed vane as L. The displacement monitoring quantity of the pair of eddy current displacement sensors is the distance value from the detection end to the surface of the test section. Before the test starts, the pair of eddy current displacement sensors are set to zero. During the test, the real-time displacement monitoring quantities Z1 and Z2 of the pair of eddy current displacement sensors are used to calculate the deflection angle of the self-designed vane to obtain the second-order motion parameters of the self-designed vane.

3. A sliding vane friction dynamics test bench for simulating the actual working conditions of an air-conditioning compressor, characterized in that, For implementing the sliding vane friction dynamics test method for simulating the real working conditions of an air-conditioning compressor according to any one of claims 1-2, including: A support assembly for placing the test assembly; The test component includes a rolling piston compressor and a servo motor for driving the crankshaft to rotate. The rolling piston compressor is arranged on the support component with the crankshaft horizontally placed and the chute facing upwards. The crankshaft is coaxially connected to the output shaft of the servo motor lying horizontally on the support component. A self-designed sliding vane is provided, which has the same material, equal mass, retains the shape of the original sliding vane, and is longer than the original sliding vane. It replaces the original sliding vane to penetrate the chute. One end extends into the compressor cavity and keeps contact fit with the roller on the crankshaft. The part exposed outside the compressor cavity is used as the test section. A labyrinth seal is provided at the chute to achieve sealing and keep frictionless with the self-designed sliding vane. According to the chute structure, a self-designed chute surrounded by a pair of sliding vane clamping blocks is configured for the test section. The pair of sliding vane clamping blocks are respectively arranged on a pair of air-floating slide rails and can slide along the displacement direction parallel to the self-designed sliding vane under the action of the friction force with the test section. The test section penetrates the self-designed chute and the end is tensioned by the original spring. The detection component includes a pair of eddy current displacement sensors for obtaining the second-order motion parameters of the self-designed sliding vane, a pair of S-shaped pressure sensors for obtaining the friction force parameters between the self-designed sliding vane and the self-designed chute, a sheet thermocouple sensor for obtaining the friction temperature parameters of the self-designed sliding vane, a thin film pressure sensor for judging whether the self-designed sliding vane and the crankshaft roller are separated, a micro temperature sensor and a piezoresistive absolute pressure sensor for obtaining the pressure and temperature parameters in the compressor cavity. The imaging device is used to obtain the motion image of the test section.

4. The sliding vane friction dynamics test bench for simulating the actual working conditions of an air-conditioning compressor according to claim 3, characterized in that, Taking the displacement direction of the self-designed sliding vane as the up and down direction, in the detection component: A pair of eddy current displacement sensors are embedded in one of the sliding vane clamping blocks, spaced along the up and down direction, and the detection ends are facing the surface of the test section on the corresponding side at a certain distance, and the displacement monitoring quantity is the real-time distance value between the detection end and the surface of the test section. A pair of S-shaped pressure sensors are symmetrically arranged in the left and right directions directly above the pair of sliding vane clamping blocks. The detection ends face downwards and are respectively connected to the pair of sliding vane clamping blocks, and the other ends are connected to the support component. The friction force parameters generated by the self-designed sliding vane are obtained by detecting the forces on the pair of sliding vane clamping blocks. The sheet thermocouple sensor is embedded in one of the sliding vane clamping blocks, and the detection end is close to the surface of the test section on the corresponding side. There are two thin film pressure sensors. One is embedded in the self-designed sliding vane in the middle along the length direction of the self-designed sliding vane, which is the first thin film pressure sensor. The other is embedded in the end of the self-designed sliding vane on the inner side of the compressor cavity, arranged along the wide side, curved in an arc shape and protruding towards the crankshaft roller, which is the second thin film pressure sensor. The first thin film pressure sensor and the second thin film pressure sensor are distributed in an "L" shape and are in contact at the intersection. Several micro temperature sensors and several piezoresistive absolute pressure sensors are embedded in the compressor cavity wall, and are spaced around the central axis of the crankshaft respectively to obtain the temperature and pressure parameters in the compressor cavity.

5. The sliding vane friction dynamics test bench for simulating the actual working conditions of an air-conditioning compressor according to claim 3, characterized in that: The imaging device is an external high-speed camera.

6. The sliding vane friction dynamics test bench for simulating the real working conditions of an air-conditioning compressor according to claim 3, characterized in that: The support component includes an anti-vibration table and a base arranged on the anti-vibration table. The test component is installed on the base, and vibration isolation is achieved through the anti-vibration table during the test process.

7. The sliding vane friction dynamics test bench for simulating the real working conditions of an air-conditioning compressor according to claim 3, characterized in that: The test section is provided with multiple evenly distributed openings.

8. The sliding vane friction dynamics test bench for simulating the real working conditions of an air-conditioning compressor according to claim 3, characterized in that: The compressor housing is reserved with a cavity refrigerant inlet and a cavity refrigerant outlet that communicate with the compressor inner cavity. The cavity refrigerant inlet and the cavity refrigerant outlet can be externally connected with pipes respectively for the injection and discharge of refrigerant.

9. The sliding vane friction dynamics test bench for simulating the actual working conditions of an air-conditioning compressor according to claim 3, wherein: A protective cover made of transparent acrylic board is set to cover the whole test bench. The protective cover is provided with a cover body refrigerant inlet and a cover body refrigerant outlet for the pipes for conveying refrigerant to pass through.

10. The sliding vane friction dynamics test bench for simulating the actual working conditions of an air-conditioning compressor according to claim 3, characterized in that: The labyrinth seal is a stepped groove type labyrinth seal piece.

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