Vacuum pump durability testing device

Abstract

The utility model relates to the technical field of vacuum pumps, and provides a vacuum pump durability testing device which comprises a cooling assembly which comprises a cooling air inlet hole and a cooling air outlet hole which are formed in a motor shell of a vacuum pump, and a cooling manifold which is assembled on the motor shell and is communicated with a cooling air source and the cooling air inlet hole; the support assembly comprises a supporting frame and a support holder which is assembled on the vacuum pump and assembled with the supporting frame. According to the vacuum pump durability testing device, the cooling air inlet hole and the cooling air outlet hole which are formed in the motor shell of the vacuum pump are matched with the cooling air source to provide cooling air, so that the motor can be quickly cooled after the vacuum pump completes a test in one cycle, and the vacuum pump can quickly enter a test in the next cycle; the test period of the vacuum pump is shortened and the durability test efficiency of the vacuum pump is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, and more specifically, to a durability test device for a vacuum pump. Background Art

[0002] A vacuum pump is a vacuum generating device driven by an electric motor, which can be applied in an automotive braking system to generate negative pressure to increase braking force. When the vacuum pump works, its electric motor drives a piston to move and suck gas. To ensure the working performance of the vacuum pump, it is necessary to conduct a durability test on the vacuum pump.

[0003] During the durability test, it is necessary to conduct a cyclic test on the vacuum pump under specified test conditions to detect whether the working parameters of the vacuum pump meet the requirements.

[0004] The existing durability test of the vacuum pump has the following problems: the electric motor will heat up during the working process of the vacuum pump. After a cycle of the test is completed, it is necessary to wait for the electric motor to dissipate heat before proceeding with the next cycle of the test until the cyclic test under the specified test conditions is completed; however, the electric motor dissipates heat slowly, resulting in a long overall test cycle and low efficiency of the vacuum pump durability test.

[0005] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present utility model, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0006] In view of this, the present utility model provides a durability test device for a vacuum pump. Through a cooling air inlet hole and a cooling air outlet hole opened on the motor housing of the vacuum pump, and cooperating with a cooling gas source to provide cooling gas, the electric motor can be quickly cooled after a cycle of the test of the vacuum pump, so that the vacuum pump can quickly enter the next cycle of the test, thereby shortening the test cycle of the vacuum pump and improving the efficiency of the durability test of the vacuum pump.

[0007] One aspect of the present utility model provides a durability test device for a vacuum pump, including: a cooling assembly, the cooling assembly includes a cooling air inlet hole and a cooling air outlet hole opened on the motor housing of the vacuum pump, and a cooling manifold assembled on the motor housing and communicating the cooling gas source with the cooling air inlet hole; a bracket assembly, the bracket assembly includes a support frame, and a bracket support assembled on the vacuum pump and assembled with the support frame.

[0008] In some embodiments, the cooling air inlet hole is opened at the top of the motor housing, and the cooling air outlet hole is opened on the side wall of the motor housing and close to the bottom of the motor housing.

[0009] In some embodiments, the cooling manifold is formed as a cover structure covering the top of the motor housing, and a cooling gas channel is provided at the top of the cover structure.

[0010] In some embodiments, mounting holes are provided on the side wall of the cover structure.

[0011] In some embodiments, the bracket hoop tightly holds the motor housing and is provided with a flange for assembling with the supporting table surface of the support frame.

[0012] In some embodiments, the support frame suspends and supports the vacuum pump.

[0013] In some embodiments, a muffler is assembled at the bottom of the vacuum pump; in the durability test state, the vacuum pump exhausts through the exhaust channel of the muffler.

[0014] In some embodiments, the support frame is provided with a plurality of vacuum pump support positions for assembling a plurality of bracket supports.

[0015] In some embodiments, the vacuum pump, the cooling manifold, and the bracket assembly are all placed in a temperature chamber, and the vacuum pump durability test device further includes a controller communicatively connected to the vacuum pump and the cooling gas source;

[0016] Wherein, the temperature chamber is configured with a temperature setting interface, and the controller is configured with a parameter setting interface for setting the motor duty cycle of the vacuum pump and the cooling temperature and on / off gas state of the cooling gas source.

[0017] The beneficial effects of the present utility model compared with the prior art at least include:

[0018] For the vacuum pump durability test device of the present utility model, through the cooling air inlet hole and the cooling air outlet hole opened on the motor housing of the vacuum pump, cooperating with the cooling gas provided by the cooling gas source and the cooling manifold for transporting the cooling gas, the motor can be quickly cooled after the vacuum pump completes a cycle of tests, so that the vacuum pump can quickly enter the next cycle of tests, thereby shortening the test cycle of the vacuum pump and improving the durability test efficiency of the vacuum pump.

[0019] In addition, for the vacuum pump durability test device of the present utility model, the bracket assembly is used to fix the vacuum pump, so that the vacuum pump remains stable during the durability test. Compared with the tooling seat directly on which the vacuum pump is placed, the bracket assembly stably supports the vacuum pump through the bracket support assembled on the vacuum pump, and realizes the stable support of the vacuum pump on the support frame through the assembly of the bracket support and the support frame, avoiding problems such as loosening and offset of the vacuum pump, and there is no need to refix the vacuum pump during the durability test.

[0020] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and cannot limit the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings herein are incorporated into and constitute a part of the specification, showing embodiments consistent with the present utility model, and are used together with the specification to explain the principles of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0022] Figure 1 Schematic structural diagram showing the assembly of a cooling manifold and a bracket support on a vacuum pump in an embodiment of the present utility model;

[0023] Figure 2 Schematic structural diagram showing the cooling manifold in an embodiment of the present utility model;

[0024] Figure 3 Schematic structural diagram showing the assembly of a vacuum pump on a support frame in an embodiment of the present utility model;

[0025] Figure 4 Schematic structural diagram showing the support frame in an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present utility model will be more complete and comprehensive, and the concept of the example embodiments will be fully conveyed to those skilled in the art.

[0027] The drawings are only schematic illustrations of the present utility model and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar structures, and thus repeated descriptions thereof will be omitted.

[0028] The terms "first", "second" and similar terms used in the specific description do not denote any order, quantity or importance, but are only used to distinguish different components. The orientation or positional relationships indicated by terms such as "top", "bottom", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. The meaning of the term "plurality" is two or more unless otherwise specifically defined. In addition, in the description of the present utility model, when it is said that a device is "connected" to another device, this includes not only the case of direct connection, but also the case of indirect connection through other elements.

[0029] It should be noted that, without conflict, the embodiments of the present utility model and the features in different embodiments can be combined with each other.

[0030] Figure 1 Schematically shows the structure of a cooling manifold and a bracket support assembled on a vacuum pump. Figure 2 Schematically shows the structure of the cooling manifold. Figure 3 Schematically shows the structure of the vacuum pump assembled on a support frame. Figure 4 Schematically shows the structure of the support frame; in combination with Figures 1 to 4 As shown, the vacuum pump durability test device provided by the embodiment of the present utility model includes:

[0031] A cooling assembly, the cooling assembly includes a cooling air inlet hole 21 and a cooling air outlet hole 22 opened on the motor housing 11 of the vacuum pump 10, and a cooling manifold 23 assembled on the motor housing 11 and communicating the cooling gas source with the cooling air inlet hole 21.

[0032] A bracket assembly, the bracket assembly includes a support frame 31, and a bracket support 32 assembled on the vacuum pump 10 and assembled with the support frame 31.

[0033] For the above-mentioned vacuum pump durability test device, through the cooling air inlet hole 21 and the cooling air outlet hole 22 opened on the motor housing 11 of the vacuum pump 10, cooperating with the cooling gas source to provide cooling gas and the cooling manifold 23 to convey the cooling gas, it can quickly cool the motor 15 after the vacuum pump 10 completes one cycle of testing, so that the vacuum pump 10 can quickly enter the next cycle of testing, thereby shortening the testing cycle of the vacuum pump 10 and improving the durability test efficiency of the vacuum pump 10.

[0034] In addition, for the above-mentioned vacuum pump durability test device, the bracket assembly is used to fix the vacuum pump 10, so that the vacuum pump 10 remains stable during the durability test. Compared with the tooling seat directly placing the vacuum pump 10 thereon, the bracket assembly stably supports the vacuum pump 10 through the bracket support 32 assembled on the vacuum pump 10, and realizes firmly supporting the vacuum pump 10 on the support frame 31 through the assembly of the bracket support 32 and the support frame 31, avoiding problems such as loosening and offset of the vacuum pump 10, and there is no need to refix the vacuum pump 10 during the durability test.

[0035] Using the above-mentioned vacuum pump durability test device, the process of performing the durability test on the vacuum pump may include the following Sa to Se.

[0036] Sa, Assemble the cooling manifold 23 on the vacuum pump 10 that has been modified (the cooling air inlet hole 21 and the cooling air outlet hole 22 are opened on the motor housing 11), and the cooling manifold 23 can be connected to the cooling gas source through a suitable pipeline to quickly cool the motor 15 of the vacuum pump 10 during the test.

[0037] Sb, assemble the support bracket 32 on the vacuum pump 10 and assemble the support bracket 32 to the support frame 31 to achieve stable support for the vacuum pump 10.

[0038] Sc, place the vacuum pump 10 together with the cooling manifold 23 and the bracket assembly into the temperature chamber so as to conduct a durability test on the vacuum pump 10 under appropriate temperature conditions. Among them, the temperature chamber is equipped with a temperature setting interface, and the temperature setting interface is used to set the test temperature. The test temperature can be set to 0°, 65°, -30°, etc. for example.

[0039] Sd, set the test parameters through a controller communicatively connected to the vacuum pump 10 and the cooling gas source. Among them, the controller is equipped with a parameter setting interface, and the parameter setting interface is used to set test parameters such as the motor duty cycle of the vacuum pump 10, the cooling temperature of the cooling gas source, and the on / off gas state. The motor duty cycle refers to the proportion of the working duration of the motor 15 (i.e., the running duration of the motor 15) in the duration of a test cycle in the duration of the test cycle. The motor duty cycle of the vacuum pump 10 can be set to 80%, 37%, 50%, etc. for example. The cooling temperature of the cooling gas source can be the default temperature of the cooling gas source or can be set according to requirements. The on / off gas state of the cooling gas source includes the gas supply state and the gas cut-off state, and can also include the gas supply rate; in the gas supply state, after the motor 15 of the vacuum pump 10 runs to the end in a test cycle, the cooling gas source supplies cooling gas to the vacuum pump 10 to help the motor 15 cool down quickly so that the vacuum pump 10 can quickly enter the next test cycle; in the gas cut-off state, after the motor 15 of the vacuum pump 10 runs to the end in a test cycle, it is necessary to wait for natural cooling before entering the next test cycle.

[0040] Se, after the vacuum pump 10 is assembled and the preparatory work such as test parameter setting is completed, start the test and record the test data for subsequent analysis.

[0041] Among them, part of the test data of the durability test is shown in the following table.

[0042]

[0043]

[0044] In the above table, the ambient temperature (i.e., the test temperature set in the temperature chamber), the motor duty ratio, the number of test cycles (i.e., the number of test periods), and whether the cooling air source is ventilated are configured test parameters. Among them, in the first group of tests, the cooling air source is in the ventilated state to support a motor duty ratio of 80%, so that the motor 15 can be quickly cooled after running to the end in a test cycle, so as to enter the next test cycle; in the second group of tests and the third group of tests, the motor duty ratio is not high, so there is no need to start the cooling air source to quickly cool the motor 15. The test duration and the motor working duration are test result data.

[0045] It should be noted that the above table only exemplarily shows some test data. According to subsequent analysis requirements, it can also include other test parameters and test result data. For example, the test result data can also include the internal temperature of the motor (the temperature of the motor shaft).

[0046] Taking the three groups of tests shown in the above table as a durability test cycle unit, the comparison between the durability test device of the vacuum pump of the present invention and the existing durability test of the vacuum pump is as follows:

[0047] Using the durability test device of the vacuum pump of the present invention to complete 500,000 durability tests on the vacuum pump 10, the total required test duration is 766.2 hours; while if using the existing durability test of the vacuum pump to complete 500,000 durability tests on the vacuum pump 10, the total required test duration is 1,601.8 hours.

[0048] Using the durability test device of the vacuum pump of the present invention to complete 600,000 durability tests on the vacuum pump 10, the total required test duration is 919.4 hours; while if using the existing durability test of the vacuum pump to complete 600,000 durability tests on the vacuum pump 10, the total required test duration is 1,922.1 hours.

[0049] Using the durability test device of the vacuum pump of the present invention to complete 1,000,000 durability tests on the vacuum pump 10, the total required test duration is 1,532.4 hours; while if using the existing durability test of the vacuum pump to complete 1,000,000 durability tests on the vacuum pump 10, the total required test duration is 3,203.5 hours.

[0050] It can be seen that the durability test device of the vacuum pump of the present invention can significantly shorten the test cycle of the vacuum pump 10 and improve the durability test efficiency of the vacuum pump 10.

[0051] In some embodiments, the cooling air inlet 21 is opened at the top of the motor housing 11, and the cooling air outlet 22 is opened at the side wall of the motor housing 11 and close to the bottom of the motor housing 11. In this way, it is convenient to assemble the cooling manifold 23 at the top area of ​​the vacuum pump 10 to avoid interference with other structural components of the vacuum pump 10, and the cooling gas can flow through the motor 15 to achieve rapid cooling.

[0052] In some embodiments, the cooling manifold 23 is formed as a cover structure that is covered on the top of the motor housing 11, and the top of the cover structure is provided with a cooling gas channel 230. The cooling manifold 23 of the cover structure is covered on the top of the motor housing 11, so that it can be conveniently and firmly assembled with the motor housing 11.

[0053] In other embodiments, the cooling manifold 23 may also have other shapes / structures, as long as it can communicate with the cooling air inlet hole 21 of the motor housing 11 to transport the cooling gas from the cooling air source.

[0054] In some embodiments, the side wall of the cover structure is provided with a mounting hole 233. The cover structure can be fitted on the motor housing 11 by interference fit, and can be firmly assembled with the motor housing 11 by means of the mounting hole 233 through fasteners such as screws and screws.

[0055] In some embodiments, the bracket 32 ​​clamps the motor housing 11 and is provided with a flange 320 for assembling with the support table 310 of the support frame 31. The vacuum pump 10 is supported on the support frame 31 by assembling the flange 320 with the support table 310.

[0056] In some embodiments, the support frame 31 supports the vacuum pump 10 in mid-air. When the vacuum pump 10 is working, the motor 15 drives the piston 16 to move, and performs a suction movement on the gas, that is, the gas is continuously sucked into the pump and discharged; wherein, the gas is discharged through the exhaust channel located at the bottom of the vacuum pump 10. The support frame 31 supports the vacuum pump 10 in mid-air, which is conducive to the discharge of the gas.

[0057] In some embodiments, a muffler 18 is installed at the bottom of the vacuum pump 10 ; in the durability test state, the vacuum pump 10 exhausts air through the exhaust channel of the muffler 18 .

[0058] The silencer 18 is used to reduce the exhaust noise of the vacuum pump 10. While playing the role of noise reduction, it will reduce the exhaust flow rate, making the exhaust of the vacuum pump 10 slower. In the existing durability test of the vacuum pump, due to the slow heat dissipation of the motor, the overall test cycle of the vacuum pump is long. Usually, the vacuum pump is not equipped with a silencer to accelerate the exhaust and shorten the test cycle as much as possible. The utility model effectively cools the motor 15 of the vacuum pump 10 through a cooling component, which can effectively shorten the test cycle and improve the test efficiency. Therefore, in the utility model, the vacuum pump 10 can be equipped with the silencer 18 as in the actual use scenario to ensure the product integrity, making the durability test result of the vacuum pump 10 true, accurate, and more capable of reflecting the actual working performance of the vacuum pump 10.

[0059] In some embodiments, the support frame 31 is provided with a plurality of vacuum pump support positions for assembling a plurality of bracket supports 32. For example, the support frame 31 may include a first vacuum pump support position 31a, a second vacuum pump support position 31b, and a third vacuum pump support position 31c. In this way, the comparative test of the vacuum pump 10 can be conveniently carried out. For example, the vacuum pump 10 assembled at the first vacuum pump support position 31a and the vacuum pump 10 assembled at the second vacuum pump support position 31b are tested under the ventilation state of the cooling air source, and the duty ratios of the motors of the two vacuum pumps 10 are different. The vacuum pump 10 assembled at the second vacuum pump support position 31b is tested under the state of the cooling air source being cut off, thus realizing the comparative test.

[0060] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or replacements can still be made, which should all be regarded as belonging to the protection scope of the present utility model.

Claims

1. A durability test device for a vacuum pump, characterized in that, Comprising: A cooling assembly, the cooling assembly including a cooling air inlet hole and a cooling air outlet hole opened on the motor housing of the vacuum pump, and a cooling manifold assembled on the motor housing and communicating a cooling air source with the cooling air inlet hole; A bracket assembly, the bracket assembly including a support frame and a bracket support assembled on the vacuum pump and assembled with the support frame; 2. The vacuum pump durability test device according to claim 1, characterized in that, The cooling air inlet hole is opened at the top of the motor housing, and the cooling air outlet hole is opened on the side wall of the motor housing and close to the bottom of the motor housing; 3. The vacuum pump durability test device according to claim 2, characterized in that, The cooling manifold is formed into a cover structure covering the top of the motor housing, and a cooling gas channel is provided at the top of the cover structure; 4. The vacuum pump durability test device according to claim 3, wherein, An installation hole is provided on the side wall of the cover structure; 5. The vacuum pump durability test device according to claim 1, characterized in that, The bracket support clamps the motor housing and is provided with a flange for assembling with the support surface of the support frame; 6. The vacuum pump durability test device according to claim 1, characterized in that The support frame suspends and supports the vacuum pump; 7. The vacuum pump durability test device according to claim 6, wherein, A silencer is assembled at the bottom of the vacuum pump; In the durability test state, the vacuum pump exhausts through the exhaust channel of the silencer; 8. The vacuum pump durability test device according to claim 1, characterized in that, The support frame is provided with a plurality of vacuum pump support positions for assembling a plurality of bracket supports; 9. The vacuum pump durability test device according to any one of claims 1-8, characterized in that, The vacuum pump, the cooling manifold and the bracket assembly are all placed in a temperature chamber, and the vacuum pump durability test device further includes a controller communicatively connected to the vacuum pump and the cooling air source; Wherein, the temperature chamber is configured with a temperature setting interface, and the controller is configured with a parameter setting interface, and the parameter setting interface is used to set the motor duty cycle of the vacuum pump and the cooling temperature and on-off gas state of the cooling air source.

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