Permanent magnet variable frequency air compressor oil-gas separation filter performance testing device

Abstract

This utility model discloses a performance testing device for oil-gas separation filter elements of permanent magnet variable frequency air compressors, relating to the field of oil-gas separation filter element testing technology. The utility model includes a testing barrel, a barrel base, an oil storage tank, and a base platform. An air injection pipe is provided on the side wall of the testing barrel, with its lower end connected to an oil mist nozzle at the upper end of the oil storage tank. The barrel base is vertically adjustable at the bottom of the testing barrel, and its edge is equipped with an oil scraping rubber ring. A high-precision electronic scale is built into the base platform. By installing the oil-gas separation filter element to be tested inside the testing barrel, a high-pressure air source injects gas through the air injection pipe. Simultaneously, lubricating oil in the oil storage tank is atomized by the oil mist nozzle and mixes with the gas to form oil mist. The oil mist condenses and falls on the inner wall of the testing barrel, and some of the oil mist is filtered by the filter element and discharged. The total weight change of the device before and after air injection is accurately measured by the electronic scale, and the weight of lubricating oil not filtered out by the filter element is calculated, thereby accurately evaluating the separation efficiency and service life of the filter element.

Description

Technical Field

[0001] This utility model belongs to the field of oil-gas separator filter element testing technology, and in particular relates to a performance testing device for oil-gas separator filter elements of permanent magnet variable frequency air compressors. Background Technology

[0002] In the manufacturing and maintenance of permanent magnet variable frequency air compressors, the performance of oil-gas separator filter elements is crucial, as their separation efficiency directly affects compressed air quality and equipment operating costs. Current testing methods for filter element performance have significant shortcomings. Traditional gravimetric testing is cumbersome, requiring multiple disassembly and weighing operations, resulting in low efficiency and susceptibility to errors. Some testing systems cannot accurately simulate the oil mist mixing state under actual air compressor operating conditions, leading to discrepancies between test results and actual performance. Furthermore, ensuring uniform oil mist distribution and accurate collection and measurement of condensed oil during testing are technical challenges. Existing devices often struggle to simultaneously achieve stable oil mist mixing, reliable sealing and isolation, and precise collection and weighing of condensed oil, hindering accurate evaluation of filter element performance and product quality control.

[0003] To address these issues, we provide a performance testing device for oil-gas separator filters in permanent magnet variable frequency air compressors. Utility Model Content

[0004] The purpose of this invention is to provide a performance testing device for oil-gas separator filter elements of permanent magnet variable frequency air compressors. The device involves vertically sliding a bottom support inside a testing barrel, with a base platform at the lower end of the base platform and an electronic scale inside the platform. An oil storage tank is located on the lower side wall of an air injection pipe fixed to the side wall of the testing barrel. An oil mist nozzle at the upper end of the oil storage tank is fitted inside the air injection pipe. The oil-gas separator filter element to be tested is then placed inside the testing barrel. A high-pressure air source is connected to one end of the oil injection pipe, allowing high-pressure gas to be injected into the testing barrel. Simultaneously, lubricating oil from the oil storage tank is sprayed from the oil mist nozzle, causing the atomized oil mist to mix with the high-pressure gas and be injected into the testing barrel. Upon contact with the inner wall of the testing barrel, the oil condenses and falls. The high-pressure gas containing oil is filtered by the oil-gas separator filter element and then discharged. The electronic scale monitors and compares the weight before and after air injection, and the oil escape amount of the filter element is calculated based on the weight difference, thereby measuring the filter element's filtration performance for the oil-gas mixture.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a performance testing device for oil-gas separator filter elements of permanent magnet variable frequency air compressors. It includes a testing barrel, a barrel base, an oil storage tank, and a base platform. The testing barrel has openings at both the top and bottom. An inner support edge is fixedly provided at the lower end of the inner wall of the testing barrel. The barrel base is vertically slidably fitted inside the testing barrel. The base platform is located below the testing barrel, and the barrel base is detachably installed on the upper surface of the base platform. An electronic scale is installed inside the base platform. An air injection pipe is fixedly connected to the outer wall of the testing barrel, with its axis parallel to the horizontal plane. The oil storage tank is located below the air injection pipe, and an oil injection pipe is provided at the upper opening of the oil storage tank. The oil injection pipe passes through the wall of the air injection pipe, and an oil mist nozzle is provided at the upper end of the oil injection pipe, with the opening of the oil mist nozzle facing inwards towards the testing barrel. The end of the air injection pipe furthest from the testing barrel is connected to a high-pressure air source.

[0006] A further feature of this invention is that an oil injection piston is vertically slidably sleeved inside the oil storage tank, and a threaded tube is vertically fixed to the lower end face of the oil injection piston. A pusher motor is installed below the oil storage tank, and a pusher drive screw is installed at the upper output end of the pusher motor. The pusher drive screw passes through the lower end of the oil storage tank and is threadedly sleeved inside the threaded tube. A set of guide rods is fixed to the lower end face of the oil injection piston, and a set of guide tubes is vertically fixed to the inner bottom surface of the oil storage tank. Each guide rod is vertically slidably sleeved in its respective guide tube.

[0007] A further feature of this invention is that an oil-scraping rubber ring is fixedly provided on the upper edge of the bottom surface of the bucket, the outer wall of the oil-scraping rubber ring is attached to the inner wall of the testing bucket, and an upward inclined surface is provided on the upper inner side of the oil-scraping rubber ring.

[0008] A further feature of this invention is that a set of oil scraping grooves are axially arrayed on the outer wall of the oil scraping rubber ring, and an oil guiding channel is provided through the bottom of the oil scraping groove. The axis of the oil guiding channel is perpendicular to and intersects the axis of the detection barrel.

[0009] A further feature of this invention is that a locking ring groove is provided on the outer side wall of the bucket base, and a set of pin tubes are fixedly arranged in a circumferential array at the lower end of the outer side wall of the detection bucket. A lateral locking pin is slidably sleeved inside the pin tube. The lateral locking pin penetrates the bucket wall of the detection bucket and is sleeved in the locking ring groove. A magnet is fixedly provided on one end face of the lateral locking pin near the bucket base.

[0010] A further feature of this invention is that a support cylinder is fixedly provided on the lower end face of the base platform, a support ring seat is vertically slidably sleeved on the outer side of the support cylinder, a crossbeam is fixedly provided on the inner wall of the support ring seat, vertical sliding grooves are symmetrically opened on both sides of the support cylinder wall, the crossbeam is slidably sleeved in the vertical sliding grooves on both sides, a lifting drive motor is provided at the lower end of the support cylinder, a lifting screw is fixedly provided at the upper output end of the lifting drive motor, the upper end of the lifting screw is rotatably installed on the lower end face of the base platform, and the lifting screw thread is screwed and passes through the crossbeam.

[0011] A further feature of this invention is that a filter element holder is detachably provided on the upper end face of the testing barrel. The filter element holder has a ring-shaped structure. A support cylinder is vertically fixed on the lower end face of the inner edge of the filter element holder. A support flange is fixed on the lower end face of the inner wall of the support cylinder. A barrel top cover is provided on the top of the filter element holder. An air collecting cone hood is provided on the upper end of the barrel top cover.

[0012] This utility model has the following beneficial effects: This invention combines a testing bucket, a liftable bucket base, and a base platform with a built-in electronic scale. During testing, it can accurately collect and weigh the weight of lubricating oil that has condensed and failed to be separated by the filter element. This enables direct and quantitative measurement of the filter element separation efficiency, significantly improving the accuracy and reliability of the test results.

[0013] This invention connects a high-pressure air source to the air injection pipe and utilizes an oil injection pipe and oil mist nozzle that run through it. This allows for the initial mixing of high-pressure air and lubricating oil within the air injection pipe, generating a uniform oil mist mixture which is then sprayed into the test chamber. This effectively simulates the real working conditions of an air compressor and provides a more practical application environment for filter element testing. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0015] Figure 1 This is a side sectional view of a performance testing device for an oil-gas separator filter element of a permanent magnet variable frequency air compressor.

[0016] Figure 2 This is a side sectional view of the oil storage tank and the gas injection pipe.

[0017] Figure 3 This is an exploded view of the oil storage tank.

[0018] Figure 4 This is an exploded view of the test bucket and its base.

[0019] Figure 5 This is a side sectional view of the base platform.

[0020] Figure 6 This is a schematic diagram showing the disassembled parts of the testing tank and filter element holder.

[0021] The attached diagram lists the components represented by each number as follows: 1-Test barrel, 101-Inner support edge, 102-Insulation pipe, 103-Pin pipe, 103a-Side locking pin, 104-Filter element support, 104a-Support cylinder, 104a-1-Support edge, 105-Top cover of the barrel, 105a-Gas collecting cone, 2-Bottom support of the barrel, 201-Oil scraper rubber ring, 201a-Oil scraper groove, 201a-1-Oil guide channel, 202-Locking ring groove, 3-Oil storage tank, 301-Oil injection pipe, 301a-Oil mist nozzle, 302-Oil injection piston, 302a-Threaded pipe, 302b-Guide rod, 303-Push plug motor, 303a-Push plug drive screw, 304-Guide tube, 4-Base platform, 401-Electronic scale, 402-Support cylinder, 402a-Vertical slide groove, 402b-Lifting drive motor, 402b-1-Lifting screw, 403-Support cylinder ring seat, 403a-Crossbeam. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Example 1

[0023] Please see Figures 1 to 6 This utility model relates to a performance testing device for an oil-gas separator filter element of a permanent magnet variable frequency air compressor, comprising a testing barrel 1, a barrel base 2, an oil storage tank 3, and a base platform 4. The testing barrel 1 has openings at both the top and bottom. An inner support edge 101 is fixedly provided at the lower end of the inner wall of the testing barrel 1. The barrel base 2 is vertically slidably fitted inside the testing barrel 1. The base platform 4 is located below the testing barrel 1. The barrel base 2 is detachably installed on the upper surface of the base platform 4. An electronic scale 401 is installed inside the base platform 4. An air injection pipe 102 is fixedly connected to the outer wall of the testing barrel 1. The axis of the air injection pipe 102 is parallel to the horizontal plane. The oil storage tank 3 is located below the air injection pipe 102. An oil injection pipe 301 is installed at the upper opening of the oil storage tank 3. The oil injection pipe 301 passes through the wall of the air injection pipe 102. An oil mist nozzle 301a is installed at the upper end of the oil injection pipe 301. The opening end of the oil mist nozzle 301a faces the inside of the test tank 1. The end of the air injection pipe 102 away from the test tank 1 is connected to a high-pressure air source. By combining the test tank 1, the liftable tank base 2 and the base platform 4 of the built-in electronic scale 401, the weight of the lubricating oil that fails to be separated by the filter element and condenses can be accurately collected and weighed during the test. This achieves direct and quantitative measurement of the filter element separation efficiency, significantly improving the accuracy and reliability of the test results.

[0024] Specifically, an oil injection piston 302 is vertically slidably sleeved inside the oil storage tank 3. A threaded tube 302a is vertically fixed to the lower end face of the oil injection piston 302. A pusher motor 303 is installed below the oil storage tank 3. A pusher drive screw 303a is installed at the upper output end of the pusher motor 303. The pusher drive screw 303a passes through the lower end of the oil storage tank 3 and is threadedly sleeved inside the threaded tube 302a. A set of guide rods 302b is fixed to the lower end face of the oil injection piston 302. A set of guide tubes 304 is vertically fixed to the inner bottom surface of the oil storage tank 3. Each guide rod 302b is vertically slidably sleeved in its respective guide tube 304. The motor controls the advancing speed of the oil injection piston 302 to ensure that the lubricating oil is supplied at a constant flow rate. The cooperation between the guide rods 302b and the guide tubes 304 ensures the stability of the piston movement.

[0025] Furthermore, an oil scraping rubber ring 201 is fixedly installed on the upper edge of the bottom support 2 of the bucket. The outer wall of the oil scraping rubber ring 201 is attached to the inner wall of the test bucket 1, and the upper inner side of the oil scraping rubber ring 201 has an upward slope. During the lifting and lowering process of the bottom support 2 of the bucket, the oil scraping rubber ring 201 can effectively scrape off the condensed oil adhering to the inner wall of the test bucket 1, ensuring that all oil that has not been separated by the filter element can be collected and weighed, thus avoiding measurement errors caused by oil residue.

[0026] Furthermore, an oil scraping groove 201a is axially arrayed on the outer wall of the oil scraping rubber ring 201. An oil guiding channel 201a-1 is formed through the bottom of the oil scraping groove 201a. The axis of the oil guiding channel 201a-1 is perpendicular to and intersects the axis of the detection tank 1. The oil scraping groove 201a can temporarily store the scraped oil and guide it to the center area of ​​the tank bottom support 2 through the oil guiding channel 201a-1 to ensure the integrity of the oil collection.

[0027] Furthermore, a locking ring groove 202 is provided on the outer side wall of the barrel base 2, and a set of pin tubes 103 are fixedly arranged in a circumferential array at the lower end of the outer side wall of the detection barrel 1. A lateral locking pin 103a is slidably sleeved in the pin tube 103. The lateral locking pin 103a penetrates the barrel wall of the detection barrel 1 and is sleeved in the locking ring groove 202. A magnet is fixedly provided on the end face of the lateral locking pin 103a near the barrel base 2. When the detection starts, the detection barrel 1 is raised so that the inner support edge 101 is attached to the lower end face of the barrel base 2, and the lateral locking pin 103a is inserted into the locking ring groove 202 to fix the height of the detection barrel 1.

[0028] Furthermore, a support cylinder 402 is fixedly provided on the lower end face of the base platform 4. A support ring seat 403 is vertically slidably sleeved on the outer side of the support cylinder 402. A crossbeam 403a is fixedly provided on the inner wall of the support ring seat 403. Vertical sliding grooves 402a are symmetrically opened through both sides of the barrel wall of the support cylinder 402. The crossbeam 403a is slidably sleeved in the vertical sliding grooves 402a on both sides. A lifting drive motor 402b is provided at the lower end of the support cylinder 402. A lifting screw 402b-1 is fixedly provided at the upper output end of the lifting drive motor 402b. The upper end of the lifting screw 402b-1 is rotatably installed on the lower end face of the base platform 4. The lifting screw 402b-1 is threaded and passes through the crossbeam 403a. The lifting drive motor 402b drives the rotation of the lifting screw 402b-1 and drives the support ring seat 403 to rise and fall, so that the support ring seat 403 lifts the detection barrel 1.

[0029] Furthermore, a filter element holder 104 is detachably provided on the upper end face of the detection barrel 1. The filter element holder 104 has a ring-shaped structure. A support cylinder 104a is vertically fixed on the lower end face of the inner edge of the filter element holder 104. A support edge 104a-1 is fixed on the lower end face of the inner wall of the support cylinder 104a. A barrel top cover 105 is provided on the top of the filter element holder 104. A gas collecting cone 105a is provided on the upper end of the barrel top cover 105. The filter element holder 104 is used to install the filter element. The gas collecting cone 105a helps to guide the separated gas to be discharged in a concentrated manner and can be connected to subsequent detection equipment for further analysis of the discharged gas.

[0030] The operation process of this embodiment is as follows: First, the oil-gas separator filter element to be tested is installed on the filter element holder 104 and placed into the test barrel 1, supported and fixed by the holder edge 104a-1; the lifting drive motor 402b is started to drive the lifting screw 402b-1 to rotate, which drives the support ring seat 403 to rise through the crossbeam 403a, so that the test barrel 1 is raised as a whole until the inner support edge 101 is attached to the lower end face of the barrel bottom support 2. Then, the lateral locking pin 103a is inserted into the locking ring groove 202 of the barrel bottom support 2 to fix it; after recording the initial weight reading of the electronic scale 401, the pusher motor 303 is started to drive the pusher drive screw 303a to rotate, pushing the oil injection piston 302 to rise smoothly under the guidance of the guide rod 302b and the guide tube 304, and the lubricating oil in the oil storage tank 3 is injected through the oil injection pipe 3 01 The oil mist is atomized and sprayed from the oil mist nozzle 301a, while high-pressure gas is introduced into the air injection pipe 102. After forming a uniform oil mist mixture in the pipe, it is sprayed into the test barrel 1. The oil mist partially condenses into droplets inside the test barrel 1 and slides down the inner wall. It is scraped off by the oil scraper rubber ring 201 and collected in the center of the barrel bottom support 2 through the oil scraper groove 201a and the oil guide channel 201a-1. The remaining oil and gas are separated by the filter element and the gas is discharged through the gas collection cone 105a. After the test, the reading of the electronic scale 401 is recorded again. The amount of oil escaped by the filter element (i.e., the weight of lubricating oil that was not filtered out by the filter element and was discharged with the gas) is calculated by the weight difference. The filtering performance of the oil-gas separation filter element is measured according to the amount of oil escape. Finally, the side locking pin 103a is pulled out, the test barrel 1 and the barrel bottom support 2 are lowered, and the cleaning is completed in preparation for the next test.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A performance testing device for oil-gas separator filter element of a permanent magnet variable frequency air compressor, comprising a testing barrel (1), a barrel base (2), an oil storage tank (3), and a base platform (4), characterized in that: The detection barrel (1) has openings at both the top and bottom. An inner support edge (101) is fixedly provided at the lower end of the inner wall of the detection barrel (1). The barrel base (2) is vertically slidably sleeved inside the detection barrel (1). The base platform (4) is located below the detection barrel (1). The barrel base (2) is detachably installed on the upper surface of the base platform (4). An electronic scale (401) is provided inside the base platform (4). An air injection pipe (102) is fixedly connected to the outer wall of the detection barrel (1). 2) The pipe axis is parallel to the horizontal plane. The oil storage tank (3) is located below the air injection pipe (102). The upper opening of the oil storage tank (3) is provided with an oil injection pipe (301). The oil injection pipe (301) passes through the pipe wall of the air injection pipe (102). The upper end of the oil injection pipe (301) is provided with an oil mist nozzle (301a). The opening end of the oil mist nozzle (301a) faces the inside of the detection barrel (1). The end of the air injection pipe (102) away from the detection barrel (1) is connected to a high-pressure gas source.

2. The performance testing device for oil-gas separator filter element of permanent magnet variable frequency air compressor according to claim 1, characterized in that: An oil injection piston (302) is vertically slidably sleeved inside the oil storage tank (3). A threaded tube (302a) is vertically fixed on the lower end face of the oil injection piston (302). A pusher motor (303) is provided below the oil storage tank (3). A pusher drive screw (303a) is provided at the upper output end of the pusher motor (303). The pusher drive screw (303a) passes through the lower end of the oil storage tank (3) and is threadedly sleeved inside the threaded tube (302a). A set of guide rods (302b) is fixed on the lower end face of the oil injection piston (302). A set of guide tubes (304) is vertically fixed on the inner bottom surface of the oil storage tank (3). Each of the guide rods (302b) is vertically slidably sleeved in each of the guide tubes (304).

3. The performance testing device for oil-gas separator filter element of permanent magnet variable frequency air compressor according to claim 1, characterized in that: An oil scraping rubber ring (201) is fixedly provided on the upper edge of the bottom surface of the barrel base (2). The outer side wall of the oil scraping rubber ring (201) is attached to the inner wall of the test barrel (1). An upward inclined surface is provided on the inner side of the upper end of the oil scraping rubber ring (201).

4. The performance testing device for oil-gas separator filter element of permanent magnet variable frequency air compressor according to claim 3, characterized in that: The outer wall of the scraper rubber ring (201) is provided with a set of scraper grooves (201a) arranged in an axial array. The bottom of the scraper groove (201a) is provided with an oil guide channel (201a-1). The axis of the oil guide channel (201a-1) is perpendicular to and intersects the axis of the test barrel (1).

5. The performance testing device for oil-gas separator filter element of permanent magnet variable frequency air compressor according to claim 4, characterized in that: The outer side wall of the bucket base (2) is provided with a locking ring groove (202). A set of pin tubes (103) are fixedly arranged in a circumferential array at the lower end of the outer side wall of the detection bucket (1). A lateral locking pin (103a) is slidably sleeved in the pin tube (103). The lateral locking pin (103a) penetrates the bucket wall of the detection bucket (1) and is sleeved in the locking ring groove (202). A magnet is fixedly provided on one end face of the lateral locking pin (103a) near the bucket base (2).

6. The performance testing device for oil-gas separator filter element of permanent magnet variable frequency air compressor according to claim 1, characterized in that: A support cylinder (402) is fixedly provided on the lower end face of the base platform (4). A support ring seat (403) is vertically slidably sleeved on the outer side of the support cylinder (402). A crossbeam (403a) is fixedly provided on the inner wall of the support ring seat (403). Vertical sliding grooves (402a) are symmetrically opened through both sides of the barrel wall of the support cylinder (402). The crossbeam (403a) is slidably sleeved in the vertical sliding grooves (402a) on both sides. A lifting drive motor (402b) is provided at the lower end of the support cylinder (402). A lifting screw (402b-1) is fixedly provided at the upper output end of the lifting drive motor (402b). The upper end of the lifting screw (402b-1) is rotatably installed on the lower end face of the base platform (4). The lifting screw (402b-1) is threaded and passes through the crossbeam (403a).

7. The performance testing device for oil-gas separator filter element of permanent magnet variable frequency air compressor according to claim 6, characterized in that: The upper end face of the test barrel (1) is detachably provided with a filter element support (104). The filter element support (104) is a ring-shaped structure. The lower end face of the inner edge of the filter element support (104) is vertically fixed with a support cylinder (104a). The lower end face of the inner wall of the support cylinder (104a) is fixed with a support edge (104a-1). The top of the filter element support (104) is covered with a barrel top cover (105). The upper end of the barrel top cover (105) is provided with a gas collecting cone hood (105a).

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