Motor sealing test device and test method

Abstract

The invention discloses a motor sealing test device and a test method, comprising a frame, a horizontal workbench is arranged on the frame, a motor tray, a Z-axis lifting mechanism and a volume filling block are arranged on the workbench; a receiving groove for placing a motor housing is arranged on the top surface of the motor tray; the Z-axis lifting mechanism comprises a blocking plate for sealing the top opening of the motor housing and a Z-axis driving device for driving the blocking plate to move along the Z-axis direction; the volume filling block is arranged on the bottom surface of the blocking plate or the volume filling block is arranged on the motor tray and is located in the receiving groove; when the motor tray moves to the right below the blocking plate, the blocking plate is driven by the Z-axis driving device to descend or rise in the Z-axis direction, so that the blocking plate blocks or opens the top opening of the motor housing; when the blocking plate blocks the top opening of the motor housing, the volume filling block is located in the inner cavity of the motor housing; the invention can reduce the space that needs to be inflated in the inner cavity of the motor housing, thereby improving the test efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of sealing detection, and in particular to a motor sealing test device and a test method. Background Art

[0002] With the increasing consumption of non-renewable resources, especially the consumption of oil resources, people have to start thinking about the sustainable development of the automobile industry. New energy vehicles will become the mainstream of automobile development in the first few decades of the new century, and it has become the consensus of all industry insiders in the automobile industry. The Chinese government is also implementing many high-tech development research plans, including major projects for new energy vehicles. In recent years, my country has basically formed a new energy vehicle power system technology platform and a new energy vehicle technical standard system framework. However, compared with the international leading level, we still have some shortcomings, including the core component technology of new energy vehicles to be improved. Based on the characteristics of electric vehicles, there are also higher requirements for the motors used. The motor is the core component of new energy vehicles. Because the motor is easy to heat up during operation, it needs to be cooled by water cooling and air cooling. Therefore, the motor needs to have waterproof sealing requirements, and its internal heat dissipation water channel has anti-leakage sealing requirements. In the past, when the demand was not high, the sealing test of the motor was often roughly tested by soap solution or soaking in water, resulting in low test efficiency, low production capacity, and high dependence on operators; at the same time, the quality and accuracy of the motor test were affected to a certain extent by manually reading the test data and performing data analysis and calculation. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, one of the objects of the present invention is to provide a fully automatic non-destructive motor sealing test device based on compressed air, which can automatically complete the sealing and clamping of the motor, reduce the space that needs to be inflated in the inner cavity of the motor housing, and improve the reliability and efficiency of the test.

[0004] The second purpose of the present invention is to provide a testing method for a motor sealing testing device, which comprehensively solves the gas supply problem from the gas source end to the test end, the test process and the automatic control of the gas routing program, and has the characteristics of easy operation, good process consistency and high testing efficiency.

[0005] One of the purposes of the present invention is achieved by the following technical solution:

[0006] A motor sealing test device comprises a frame, wherein a horizontal workbench is arranged on the frame, wherein the length direction of the workbench is an X-axis direction, the width direction of the workbench is a Y-axis direction, and the height direction of the workbench is a Z-axis direction; the characteristics are as follows:

[0007] The workbench is provided with a motor tray, a Z-axis lifting mechanism and a volume filling block;

[0008] The top surface of the motor tray is provided with a receiving groove for accommodating the motor housing;

[0009] The Z-axis lifting mechanism includes a blocking plate for covering the top opening of the motor housing and a Z-axis driving device for driving the blocking plate to move along the Z-axis direction;

[0010] The volume filling block is arranged on the bottom surface of the blocking plate, or the volume filling block is arranged on the motor tray and is located in the accommodating groove;

[0011] When the motor tray moves to the bottom of the blocking plate, the Z-axis driving device drives the blocking plate to descend or ascend in the Z-axis direction, so that the blocking plate blocks or opens the top opening of the motor housing; when the blocking plate blocks the top opening of the motor housing, the volume filling block is located in the inner cavity of the motor housing.

[0012] In an optional embodiment, it also includes a Y-axis sliding mechanism, which includes a guide rail and a Y-axis driving device. The guide rail is fixedly installed on the workbench along the Y-axis direction, and a slider that slides with the guide rail is provided on the bottom surface of the motor tray; the Y-axis driving device drives the motor tray to slide on the guide rail along the Y-axis direction.

[0013] In an optional embodiment, the motor tray is further provided with a first test channel for communicating with a cooling water channel of the motor housing; the motor tray is also provided with a second test channel for communicating with an inner cavity of the motor housing.

[0014] In an optional embodiment, a multi-pipeline pressure flow coefficient testing device is further included, and the multi-pipeline pressure flow coefficient testing device includes:

[0015] A main gas pipeline assembly, the main gas pipeline assembly comprising a main gas pipeline and a one-way valve, a first pressure-stabilizing gas storage tank, a switch valve, a first pressure regulating valve and a filter sequentially installed on the main gas pipeline along the gas delivery direction, the gas inlet end of the main gas pipeline being connected to a gas source;

[0016] Two groups of test pipeline assemblies, the test pipeline assemblies include a test air pipe and a first solenoid valve, a second pressure regulating valve, a flow sensor and a pressure sensor installed on the test air pipe in sequence along the gas delivery direction; the air inlet ends of the two groups of test air pipes of the test pipeline assemblies are respectively connected to the air outlet ends of the main air pipe, the air outlet end of one group of test air pipes is connected to the air inlet of the first test channel, and the air outlet end of the other group of test air pipes is connected to the air inlet of the second test channel.

[0017] In an optional embodiment, it also includes a branch gas pipe, the air inlet end of the branch gas pipe is connected to the main gas pipe, and the connection between the branch gas pipe and the main gas pipe is located at the rear end of the filter along the gas transmission direction; the air outlet end of the branch gas pipe is connected to an external gas-using device.

[0018] A second pressure-stabilizing gas storage tank and a stop valve are installed in sequence on the main gas pipeline along the gas delivery direction. The second pressure-stabilizing gas storage tank is located at the rear end of the connection between the branch gas pipeline and the main gas pipeline along the gas delivery direction; a pressure gauge and a pressure switch are provided on the first pressure regulating valve.

[0019] In an optional embodiment, it further includes an air source device;

[0020] The main gas pipeline includes a first hose, a second hose, a first hard pipe, a third hose, a fourth hose, a second hard pipe and a multi-way pipe joint; the one-way valve is arranged on the first hose, and the air inlet end of the first hose is connected to the air outlet of the air source device; the air outlet end of the first hose is connected in sequence through the first pressure-stabilizing gas storage tank, the second hose, the first hard pipe, the third hose, the second pressure-stabilizing gas storage tank, the fourth hose, the second hard pipe and the air inlet end of the multi-way pipe joint; the switch valve, the first pressure regulating valve and the filter are installed on the first hard pipe, and the stop valve is installed on the second hard pipe;

[0021] The test air pipe includes a third hard tube, a fifth soft tube and a fourth hard tube; the air inlet end of the third hard tube is connected to one of the air outlet ends of the multi-way pipe joint, and its air outlet end is connected to the air inlet end of the fourth hard tube through the fifth soft tube in turn; the first solenoid valve, the second pressure regulating valve, the flow sensor and the pressure sensor are installed on the third hard tube; the switch valve, the first pressure regulating valve, the second pressure regulating valve and the flow sensor are all provided with a mounting structure for fixed connection with the frame; the multi-way pipe joint is a three-way pipe with one inlet and two outlets; the fourth hard tube is also provided with a second solenoid valve.

[0022] In an optional embodiment, the Z-axis drive device includes four guide columns installed on a workbench, a guide plate slidably mounted on the four guide columns, a cylinder fixing plate fixedly mounted on the top of the guide columns, and a downward pressure cylinder mounted on the cylinder fixing plate; the top surface of the guide plate is fixedly connected to the lower end of the piston rod of the downward pressure cylinder, and the sealing plate is fixedly mounted below the guide plate.

[0023] In an optional embodiment, an outward expansion type sealing device is respectively provided at the position of the air outlet of the first test channel and the second test channel, and the outward expansion type sealing device comprises a sealing shell, a movable block, a plug connector and an elastic sealing ring, one end of the sealing shell is provided with an active cavity, the other end of the sealing shell is provided with a sealing end, and the plug connector is installed at the sealing end; the elastic sealing ring is clamped between the sealing end and the plug connector; the movable block is movably connected in the movable cavity and can move toward or away from the sealing end; the plug connector is connected to the movable block, and the plug connector is used to squeeze the elastic sealing ring after the movable block moves away from the sealing end, so that the elastic sealing ring is deformed outward;

[0024] The external expansion type sealing device also includes a mounting seat, the sealing housing is mounted on the mounting seat and is spaced apart from the sealing seat; the end of the movable block is connected to the mounting seat through an elastic component; the elastic component is used to provide elastic stress to make the movable block move close to the sealing end;

[0025] The external expansion sealing device also includes a fixed arm fixedly mounted on the bottom surface of the guide plate, and a driving member fixedly mounted at the lower end of the fixed arm; the power output end of the driving member is connected to the mounting seat.

[0026] In an optional embodiment, a through hole is provided in the sealing end, the through hole passes through the movable cavity, a guide column is provided at a portion of the movable block close to the sealing end, the guide column is movably connected to the through hole, and the plug connector is connected to the guide column through a connecting rod; a limiting column is provided at one end of the connecting rod, a limiting hole is provided in the guide column, and a first limiting step is provided on the inner wall of the limiting hole; a second limiting step is provided on the outer surface of the limiting column, the limiting column is connected to the limiting hole; the second limiting step is used to abut against the first limiting step to prevent the connecting column from being detached from the guide column.

[0027] In an optional embodiment, a first sealing ring is clamped between the outer surface of the movable block and the inner wall of the movable cavity; a second sealing ring is clamped between the outer surface of the guide column and the inner wall of the through-hole; a driving channel is provided in the movable block, and the driving channel passes through the movable cavity; the driving channel is used to introduce fluid to drive the movable block to move away from the sealing end; a gasket is sleeved on the outside of the connecting rod, and the gasket is inserted into the through-hole; a clamping block is provided at the sealing end, and the connecting rod is inserted into the clamping block, one end of the connecting rod extends from the clamping block and extends into the through-hole to be connected with the guide column; the other end of the connecting rod extends from the clamping block and is connected to the plug connector; the elastic sealing ring is sleeved on the end of the connecting rod close to the plug connector, and clamped between the clamping block and the plug connector.

[0028] The second object of the present invention is achieved by adopting the following technical solution:

[0029] A testing method for a motor sealing test device comprises the following steps:

[0030] Preparation step: Place the motor housing in the accommodating groove of the motor tray, and the Y-axis drive device drives the motor tray to slide on the guide rail along the Y-axis direction. When the motor tray moves to the bottom of the sealing plate, the Z-axis drive device drives the sealing plate to descend in the Z-axis direction, so that the sealing plate seals the top opening of the motor housing, and the volume filling block is located in the inner cavity of the motor housing; The outlet ends of the two groups of test air pipes are sealed and connected to the air inlets of the first test channel and the second test channel respectively, and the air outlets of the first test channel and the second test channel are connected to the atmosphere respectively; First, close the switch valve and the first solenoid valve, and the air source inflates the first pressure-stabilizing gas tank through the one-way valve. After the preset inflation time, open the switch valve, and the gas is pressure-regulated by the first pressure regulating valve, and then filtered out moisture through the filter;

[0031] Testing process: block the air outlets of the first test channel and the second test channel, then open the first solenoid valves on each test air pipe, and use the gas after filtering out moisture to inflate the motor housing. During the test, the pressure sensor detects the air pressure of the motor housing, and the pressure sensor sends the detected pressure information to the central controller. The central controller controls the opening of the second pressure regulating valve according to the pressure information fed back by the pressure sensor, so that the test air pipe maintains a constant pressure; the flow rate of the motor housing is detected by the flow sensor. After the preset test time, when the actual flow rate change value within the test time reaches the preset flow rate change value pre-stored in the central controller, the motor housing is qualified, otherwise, it is unqualified;

[0032] Exhaust stage: After the test is completed, close the switch valve and the first solenoid valve, open the air outlets of the first test channel and the second test channel, and exhaust the gas in the test pipeline.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. A motor tray, a Z-axis lifting mechanism and a volume filling block are arranged on a workbench of the motor sealing test device of the present invention. During operation, the motor housing is placed in the accommodating groove of the motor tray. When the motor tray moves to just below the sealing plate, the Z-axis driving device drives the sealing plate to descend or rise in the Z-axis direction, so that the sealing plate blocks or opens the top opening of the motor housing; when the sealing plate blocks the top opening of the motor housing, the volume filling block is located in the inner cavity of the motor housing; therefore, the present invention can reduce the space that needs to be inflated in the inner cavity of the motor housing, improve the test efficiency, and at the same time save the test gas and reduce the test cost.

[0035] 2. The multi-pipeline pressure flow coefficient test device of the present invention includes a main gas transmission pipeline assembly and more than two groups of test pipeline assemblies. In the preparation link, the gas source inflates the first pressure-stabilizing gas storage tank through a one-way valve to stabilize the pressure. After the preset inflation time, the gas is regulated by the first pressure regulating valve to further ensure the stability of the air pressure, and then the water is filtered out by the filter to avoid the influence of water on the test results. In the test link, the air pressure of the motor housing is detected by the pressure sensor, and the pressure sensor sends the detected pressure information to the central controller. The central controller controls the opening of the second pressure regulating valve according to the pressure information fed back by the pressure sensor, so that the test air pipe maintains a constant pressure. In this process, uniform inflation can also be achieved, thereby protecting the flow sensor. The flow of the motor housing is detected by the flow sensor. After the preset test time, when the actual flow change value within the test time reaches the preset flow change value pre-stored in the central controller, the motor housing is qualified, otherwise, it is unqualified. Therefore, the present invention can simultaneously perform multiple motor housing tests, and has the advantages of good stability, good test accuracy, and high test efficiency.

[0036] 3. When the outward expansion sealing device of the present invention is sealing, the sealing end and the plug connector can be inserted into the pipe to be tested. Thereafter, the movable block moves away from the sealing end, thereby driving the plug connector to move toward the sealing end, thereby squeezing the elastic sealing ring. The elastic sealing ring can be squeezed during sealing and then produce an outward expansion deformation, so that the elastic sealing ring is in closer contact with the inner wall of the pipe to be tested, thereby improving the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A three-dimensional diagram of a motor sealing test device according to an embodiment;

[0038] Figure 2 A three-dimensional diagram of a motor tray and a blocking plate of an embodiment;

[0039] Figure 3 A three-dimensional diagram of a motor tray of an embodiment;

[0040] Figure 4 is a three-dimensional diagram of a motor housing of an embodiment;

[0041] Figure 5 A three-dimensional view of the motor housing of the embodiment from another angle;

[0042] Figure 6 A schematic diagram of pipeline connection of a multi-pipeline pressure flow coefficient testing device according to an embodiment;

[0043] Figure 7 Another pipeline connection schematic diagram of the multi-pipeline pressure flow coefficient testing device of the embodiment;

[0044] Figure 8It is a structural schematic diagram of a multi-pipeline pressure flow coefficient testing device of an embodiment;

[0045] Fig. 9 A three-dimensional diagram of the switch valve, the first pressure regulating valve, and the filter of the embodiment;

[0046] Fig.10 It is a structural schematic diagram of the outward expansion type sealing device of the present invention;

[0047] Fig.11 It is a partial structural schematic diagram of the outward expansion type sealing device of the present invention;

[0048] Fig.12 It is a cross-sectional view of the external expansion sealing device of the present invention.

[0049] In the figure: 101, workbench; 102, motor tray; 1021, accommodating groove; 1022, first test channel; 1023, second test channel; 103, blocking plate; 104, volume filling block; 1051, guide rail; 1052, Y-axis driving device; 106, guide column; 107, guide plate; 108, cylinder fixing plate; 109, downward pressure cylinder; 110, main gas pipeline; 111, first hose; 112, second hose; 113, first hard pipe; 114, third hose; 115, fourth hose; 116, second hard pipe; 117, multi-way pipe joint; 120, one-way valve; 130, first pressure-stabilizing gas storage tank; 140, switch valve; 150, first pressure regulating valve; 151, pressure gauge; 152, pressure switch; 160, filter; 170, second pressure-stabilizing gas storage tank; 180, stop valve; 210, test air pipe; 211, third hard pipe; 212, fifth soft pipe; 213, fourth hard pipe; 220, first solenoid valve; 230, second pressure regulating valve; 240, flow sensor; 250, pressure sensor; 260, second solenoid valve; 300, branch air pipe; 400, motor housing; 500, air source device; 600, mounting structure; 710, sealing housing; 711, sealing end; 720, movable block; 721, guide column; 7211, limiting hole; 722, driving channel; 723, first sealing ring; 724, second sealing ring; 725, gasket; 730, plug connector; 740, elastic sealing ring; 750, mounting seat; 760, clamping block; 770, driving member; 780, elastic component; 790, connecting rod; 791, limiting column. DETAILED DESCRIPTION

[0050] Below, in conjunction with the accompanying drawings and specific embodiments, the present invention is further described. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Except for special instructions, the materials and equipment used in this embodiment can be purchased from the market. Examples of embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and the limitations of the present application cannot be understood.

[0051] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0052] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0054] Example:

[0055] Please refer to Figure 1-12 A motor sealing test device comprises a frame, a horizontal workbench 101 is arranged on the frame, the length direction of the workbench 101 is the X-axis direction, the width direction of the workbench is the Y-axis direction, and the height direction of the workbench is the Z-axis direction;

[0056] The workbench 101 is provided with a motor tray 102, a Z-axis lifting mechanism and a volume filling block 104;

[0057] A receiving groove 1021 for placing the motor housing 400 is provided on the top surface of the motor tray 102;

[0058] The Z-axis lifting mechanism includes a sealing plate 103 for sealing the top opening of the motor housing and a Z-axis driving device for driving the sealing plate 103 to move along the Z-axis direction; the Z-axis driving device can specifically be a cylinder.

[0059] The volume filling block 104 is arranged on the bottom surface of the blocking plate 103; or, the volume filling block is arranged on the motor tray and is located in the accommodating groove;

[0060] When the motor tray moves to the bottom of the blocking plate, the Z-axis driving device drives the blocking plate to descend or rise in the Z-axis direction, so that the blocking plate blocks or opens the top opening of the motor housing; when the blocking plate blocks the top opening of the motor housing 400, the volume filling block is located in the inner cavity of the motor housing.

[0061] In this embodiment, the blocking plate is sealed to the top opening of the motor housing, and the bottom of the motor housing is sealed to the accommodating groove.

[0062] In an optional embodiment, a Y-axis sliding mechanism is further included, the Y-axis sliding mechanism includes a guide rail 1051 and a Y-axis driving device 1052, the guide rail 1051 is fixedly installed on the workbench along the Y-axis direction, a slider that slides with the guide rail is provided on the bottom surface of the motor tray; the Y-axis driving device drives the motor tray to slide on the guide rail along the Y-axis direction. Specifically, the Y-axis driving device can be a cylinder.

[0063] In an optional embodiment, the motor tray 102 is further provided with a first test channel 1022 for communicating with the cooling water channel of the motor housing; the motor tray 102 is further provided with a second test channel 1023 for communicating with the inner cavity of the motor housing. Specifically, the air inlet of the first test channel 1022 is connected to the air inlet pipe, and the air outlet pipe thereof is connected to the air outlet pipe. The air inlet of the second test channel 1023 is connected to the air inlet pipe, and the air outlet pipe thereof is connected to the air outlet pipe.

[0064] In an optional embodiment, a multi-pipeline pressure flow coefficient testing device is further included, and the multi-pipeline pressure flow coefficient testing device includes:

[0065] A main gas pipeline assembly, the main gas pipeline assembly comprises a main gas pipeline 110 and a one-way valve 120, a first pressure-stabilizing gas storage tank 130, a switch valve 140, a first pressure regulating valve 150 and a filter 160 which are sequentially installed on the main gas pipeline along the gas delivery direction, and the gas inlet end of the main gas pipeline is connected to a gas source;

[0066] Two groups of test pipeline assemblies, the test pipeline assemblies include a test air pipe 210 and a first solenoid valve 220, a second pressure regulating valve 230, a flow sensor 240 and a pressure sensor 250 installed on the test air pipe in sequence along the gas delivery direction; the air inlet ends of the test air pipes of more than two groups of test pipeline assemblies are respectively connected to the air outlet ends of the main air pipe, the air outlet end of one group of the test air pipes is connected to the air inlet of the first test channel, and the air outlet end of the other group of the test air pipes is connected to the air inlet of the second test channel.

[0067] In a preferred embodiment of the present invention, a branch gas pipe 300 is also included, the gas inlet end of the branch gas pipe is connected to the main gas pipe, and the connection between the branch gas pipe and the main gas pipe is located at the rear end of the filter along the gas transmission direction; the gas outlet end of the branch gas pipe is externally connected to a gas-using device. Specifically, the gas-using device includes equipment such as a cylinder. In this design, part of the gas in the main gas pipe is transported to the cylinder through the branch gas pipe, which is conducive to saving the space occupied by the pipeline.

[0068] In a preferred embodiment of the present invention, a second pressure-stabilizing gas storage tank 170 and a stop valve 180 are sequentially installed on the main gas pipeline along the gas delivery direction, and the second pressure-stabilizing gas storage tank is located at the rear end of the connection between the branch gas pipeline and the main gas pipeline along the gas delivery direction. The stability of the gas pressure is ensured by the second pressure-stabilizing gas storage tank. When the second pressure-stabilizing gas storage tank needs to be inspected and repaired, it is only necessary to close the stop valve, which has the advantage of convenient operation.

[0069] In a preferred embodiment of the present invention, a pressure gauge 151 and a pressure switch 152 are provided on the first pressure regulating valve 150. When the pressure gauge shows that the pressure is too high, the central controller controls the first pressure regulating valve 150 to adjust the air pressure. At the same time, when the air pressure exceeds the preset value, the pressure switch will automatically cut off to play a protective role.

[0070] In a preferred embodiment of the present invention, it further includes an air source device 500;

[0071] The main gas transmission pipe 110 includes a first hose 111, a second hose 112, a first hard pipe 113, a third hose 114, a fourth hose 115, a second hard pipe 116 and a multi-way pipe joint 117; a one-way valve is arranged on the first hose, and the air inlet end of the first hose is connected to the air outlet of the air source device; the air outlet end of the first hose is connected in sequence through the first pressure-stabilizing gas storage tank, the second hose, the first hard pipe, the third hose, the second pressure-stabilizing gas storage tank, the fourth hose, the second hard pipe and the air inlet end of the multi-way pipe joint; the switch valve, the first pressure regulating valve and the filter are installed on the first hard pipe, and the stop valve is installed on the second hard pipe;

[0072] The test air pipe 210 includes a third hard tube 211, a fifth soft tube 212 and a fourth hard tube 213; the air inlet end of the third hard tube is connected to one of the air outlet ends of the multi-way pipe joint, and its air outlet end is connected to the air inlet end of the fourth hard tube through the fifth soft tube in turn; the first solenoid valve, the second pressure regulating valve, the flow sensor and the pressure sensor are installed on the third hard tube.

[0073] In this design, by arranging the first hose, the second hose, the third hose, and the fourth hose to connect the first pressure-stabilizing gas tank and the second pressure-stabilizing gas tank, it is convenient to arrange the first pressure-stabilizing gas tank and the second pressure-stabilizing gas tank with larger volumes outside the machine body. In addition, the third hard pipe and the fourth hard pipe are connected by the fifth hose, so that the third hard pipe and the fourth hard pipe can be arranged separately, which is beneficial to reducing the arrangement of the pipeline and reasonably utilizing the space.

[0074] In a preferred embodiment of the present invention, the switch valve, the first pressure regulating valve, the second pressure regulating valve and the flow sensor are all provided with a mounting structure 600 for fixed connection with an external plate. Such a design has the advantages of convenient installation and small space occupation.

[0075] In a preferred embodiment of the present invention, the multi-way pipe joint is a three-way pipe with one inlet and two outlets, and correspondingly, the number of the test pipe assemblies is two groups.

[0076] In a preferred embodiment of the present invention, the fourth hard pipe is further provided with a second electromagnetic valve 260. With this design, when the test pipeline needs to be inspected and repaired, the second electromagnetic valve can be closed, which has the advantage of convenient operation.

[0077] In an optional embodiment, the Z-axis drive device includes four guide columns 106 installed on the workbench, a guide plate 107 slidably sleeved on the four guide columns, a cylinder fixing plate 108 fixedly installed on the top of the guide columns, and a downward pressure cylinder 109 installed on the cylinder fixing plate; the top surface of the guide plate is fixedly connected to the lower end of the piston rod of the downward pressure cylinder, and the sealing plate is fixedly installed below the guide plate.

[0078] In a preferred embodiment of the present invention, an external expansion type sealing device is respectively provided at the position of the air outlet of the first test channel and the second test channel, and the external expansion type sealing device includes a sealing shell 710, a movable block 720, a plug connector 730 and an elastic sealing ring 740. A movable cavity is provided at one end of the sealing shell 710, and a sealing end 711 is provided at the other end of the sealing shell 710. The above-mentioned plug connector 730 is installed at the sealing end 711, and the elastic sealing ring 740 can be clamped between the sealing end 711 and the plug connector 730.

[0079] Specifically, the movable block 720 can be movably connected in the movable cavity, and the movable block 720 can move toward or away from the sealing end 711. The above-mentioned plug connector 730 is connected to the movable block 720. The plug connector 730 can squeeze the elastic sealing ring 740 after the movable block 720 moves away from the sealing end 711, so that the elastic sealing ring 740 is deformed outward.

[0080] The external expansion type sealing device also includes a mounting seat 750, and the sealing housing 710 is spaced apart from the sealing seat. In addition, the end of the movable block 720 is connected to the mounting seat 750 through an elastic component 780, and the elastic component 780 can provide an elastic stress, under the action of which, the movable block 720 moves close to the sealing end 711.

[0081] Specifically, with the mounting seat 750 as the mounting base, when performing the sealing function, the mounting seat 750 can be moved as a whole so that the sealing end 711 of the sealing housing 710, the elastic sealing ring 740 and the plug connector 730 are all inserted into the pipeline to be tested. After being inserted in place, the elastic component 780 is in a normal state, and the elastic stress provided causes the movable block 720 to abut against the end wall of the movable cavity. Thereafter, further sealing function begins, and the movable block 720 is driven by external force to move away from the sealing end 711. During the movement of the movable block 720 away from the sealing end 711, the elastic component 780 is compressed, and at the same time, the plug connector 730 moves toward the sealing end 711, causing the elastic sealing ring 740 to deform outward. After the sealing test is completed, the power applied to the movable block 720 is removed, and the elastic component 780 is reset to reset the movable block 720.

[0082] The external expansion sealing device also includes a fixed arm fixedly installed on the bottom surface of the guide plate, and a driving member 770 fixedly installed at the lower end of the fixed arm. The power output end of the driving member 770 is connected to the mounting seat 750. The driving member 770 can be specifically selected as a cylinder in the prior art. The piston rod of the cylinder can be connected to the mounting seat 750. The extension and retraction of the piston rod of the cylinder can drive the mounting seat 750 to move, thereby driving the sealing shell 710, the elastic sealing ring 740 and the plug connector 730 installed on the mounting seat 750 as the installation basis to move as a whole, so as to insert or withdraw the pipeline to be tested, and the operation is more convenient.

[0083] On the basis of the above structure, when using the external expansion sealing device of the present invention, the sealing end 711, the elastic sealing ring 740 and the plug connector 730 can be inserted into the pipe to be tested, and then the movable block 720 is driven by external force to move away from the sealing end 711. At this time, the movable block 720 can drive the plug connector 730 to move toward the sealing end 711, thereby squeezing the elastic sealing ring 740 clamped between the sealing end 711 and the plug connector 730. The elastic sealing ring 740 will deform outward during the squeezing process, so that the elastic sealing ring 740 is tightly attached to the inner wall of the pipe to be tested, forming a larger sealing surface and a better sealing effect.

[0084] Furthermore, a through hole may be provided in the sealing end 711, and the through hole is connected to the movable cavity. Correspondingly, a guide column 721 is provided in the part of the movable block 720 near the sealing end 711, and the guide column 721 can be movably connected in the through hole, and the plug connector 730 can be connected in the guide column 721 through the connecting rod 790. In this way, when the movable block 720 moves, the guide column 721 and the through hole slide together, which can guide the movable block 720 to move stably, and the sealing process is more stable. The plug connector 730 is connected to the guide column 721 through the connecting rod 790, so that a certain distance can be maintained between the plug connector 730 and the sealing end 711, which is convenient for the movement of the plug connector 730, so that the elastic sealing ring 740 produces a relatively large deformation variable, and the sealing area is larger.

[0085] More specifically, a limiting column 791 may be provided at one end of the connecting rod 790, and a limiting hole 7211 is provided in the guide column 721 correspondingly, a first limiting step is provided on the inner wall of the limiting hole 7211, and a second limiting step is provided on the outer surface of the limiting column 791. When assembling the connecting rod 790 and the movable block 720, the limiting column 791 may be inserted into the limiting hole 7211, and the second limiting step may abut against the first limiting step after the limiting column 791 is inserted into the limiting hole 7211, so as to prevent the connecting column from being separated from the guide column 721, and thus the assembly may be completed. In addition, the limiting hole 7211 may provide a certain amount of movement space, and when the movable block 720 is reset, the limiting column 791 may move relative to the limiting hole 7211, and the plug connector 730 may have a certain amount of buffer space, so as to limit the movement of the plug connector 730 away from the sealing end 711.

[0086] Of course, the assembly of the limiting column 791 and the limiting hole 7211 can also guide the plug connector 730 to move stably.

[0087] Specifically, in this embodiment, a first sealing ring 723 can be sandwiched between the outer surface of the movable block 720 and the inner wall of the movable cavity. Similarly, a second sealing ring 724 can be sandwiched between the outer surface of the guide column 721 and the inner wall of the through hole. In this way, the first sealing ring 723 and the second sealing ring 724 can form a relatively sealed space in the movable cavity. Based on this structure, a driving channel 722 is provided in the movable block 720, and the driving channel 722 runs through the movable cavity. By introducing fluid into the driving channel 722, the fluid enters the movable cavity, and the movable block 720 can be driven to move away from the sealing end 711. Of course, the fluid can be selected as gas or liquid in the prior art. By introducing or exporting gas or liquid, no additional driving force is required, saving resources.

[0088] Of course, in the present application, a gas nozzle may be provided at the end of the driving channel 722, and gas may be introduced into the driving channel 722 through the gas nozzle, so that air intake is more convenient.

[0089] Furthermore, a gasket 725 can be mounted on the outside of the connecting rod 790, and the gasket 725 can be inserted into the insertion hole, that is, after the movable block 720 moves away from the sealing end 711, the movable block 720 can drive the connecting rod 790 to move in conjunction, and then pull the plug connector 730 close to the sealing end 711. At this time, the gasket 725 can balance the driving force of the movable block 720 to make the force more stable.

[0090] Furthermore, a pressing block 760 may be provided at the sealing end 711, and the connecting rod 790 is inserted into the pressing block 760. One end of the connecting rod 790 extends from the pressing block 760 and extends into the through hole to be connected with the guide column 721, while the other end of the connecting rod 790 extends from the pressing block 760 and is connected with the plug connector 730. The elastic sealing ring 740 is sleeved on the end of the connecting rod 790 close to the plug connector 730 and is clamped between the pressing block 760 and the plug connector 730. In this way, when the plug connector 730 moves toward the sealing end 711, the elastic sealing ring 740 can be squeezed by the plug connector 730 and move toward the pressing block 760. The contact surface between the elastic sealing ring 740 and the pressing block 760 is relatively large, the deformation generated is relatively uniform, and the formed sealing structure is more stable.

[0091] Of course, the connecting rod 790 and the plug connector 730 in this embodiment can be connected by screws, which is convenient for disassembly and replacement.

[0092] Preferably, there are four elastic components 780, which are spaced apart around the central axis of the movable block 720, that is, the movable block 720 can be connected to the mounting seat 750 through four evenly distributed elastic components 780, and the force is more evenly applied. The elastic component 780 in this embodiment can be a spring in the prior art.

[0093] This embodiment also provides a method for testing a motor sealing test device, comprising the following steps:

[0094] Preparation step: Place the motor housing in the accommodating groove of the motor tray, and the Y-axis drive device drives the motor tray to slide on the guide rail along the Y-axis direction. When the motor tray moves to the bottom of the sealing plate, the Z-axis drive device drives the sealing plate to descend in the Z-axis direction, so that the sealing plate seals the top opening of the motor housing, and the volume filling block is located in the inner cavity of the motor housing; The outlet ends of the two groups of test air pipes are sealed and connected with the air inlets of the first test channel and the second test channel respectively, and the air outlets of the first test channel and the second test channel are connected to the atmosphere respectively; First, close the switch valve, the stop valve and the first solenoid valve, and the gas source inflates the first pressure-stabilizing gas storage tank through the one-way valve. After the preset inflation time, open the switch valve, and the gas is pressure-regulated by the first pressure regulating valve, and then filtered out moisture through the filter; part of the gas that has been filtered out of moisture enters the branch gas pipe, and the other part of the gas enters the second pressure-stabilizing gas storage tank for gas storage;

[0095] Testing process: block the air outlets of all motor housings, open the stop valves, and then open the first solenoid valves on each test air pipe. The gas in the second pressure-stabilizing gas tank inflates the motor housings respectively. During the test, the pressure sensor detects the air pressure of the motor housing. The pressure sensor sends the detected pressure information to the central controller. The central controller controls the opening of the second pressure regulating valve according to the pressure information fed back by the pressure sensor, so that the test air pipe maintains a constant pressure. The flow rate of the motor housing is detected by the flow sensor. After the preset test time, when the actual flow rate change value within the test time reaches the preset flow rate change value pre-stored in the central controller, the motor housing is qualified, otherwise, it is unqualified.

[0096] Exhaust stage: After the test is completed, close the switch valve, stop valve and the first solenoid valve, open the air outlets of all motor housings, and exhaust the gas in the test pipeline.

[0097] The flow coefficient refers to the volume flow rate or mass flow rate of the pipeline medium flowing through the valve under the test conditions and the constant pressure of the pipeline in a unit time, that is, the flow capacity. The larger the flow coefficient value, the smaller the pressure loss when the fluid flows through the valve.

[0098] Although only certain components and embodiments of the present application have been illustrated and described, many modifications and changes (e.g., changes in size, dimensions, structure, shape and proportion of the various elements, mounting arrangements, use of materials, color, orientation, etc.) may be envisioned by those skilled in the art without actually departing from the scope and spirit of the claims.

[0099] Finally, it should be noted that the above-mentioned implementation modes are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention are within the scope of protection required by the present invention.

Claims

1. A motor sealing test device, comprising a frame, wherein a horizontal workbench is arranged on the frame, wherein the length direction of the workbench is the X-axis direction, the width direction of the workbench is the Y-axis direction, and the height direction of the workbench is the Z-axis direction; characterized in that: The workbench is provided with a motor tray, a Z-axis lifting mechanism and a volume filling block; The top surface of the motor tray is provided with a receiving groove for accommodating the motor housing; The Z-axis lifting mechanism includes a blocking plate for covering the top opening of the motor housing and a Z-axis driving device for driving the blocking plate to move along the Z-axis direction; The volume filling block is arranged on the bottom surface of the blocking plate, or the volume filling block is arranged on the motor tray and is located in the accommodating groove; When the motor tray moves to the bottom of the blocking plate, the Z-axis driving device drives the blocking plate to descend or ascend in the Z-axis direction, so that the blocking plate blocks or opens the top opening of the motor housing; when the blocking plate blocks the top opening of the motor housing, the volume filling block is located in the inner cavity of the motor housing; It also includes a Y-axis sliding mechanism, which includes a guide rail and a Y-axis driving device. The guide rail is fixedly installed on the workbench along the Y-axis direction, and a slider that slides with the guide rail is provided on the bottom surface of the motor tray; the Y-axis driving device drives the motor tray to slide on the guide rail along the Y-axis direction; the motor tray is also provided with a first test channel for communicating with the cooling water channel of the motor housing; the motor tray is also provided with a second test channel for communicating with the inner cavity of the motor housing; It also includes a multi-pipeline pressure flow coefficient testing device, the multi-pipeline pressure flow coefficient testing device includes: A main gas pipeline assembly, the main gas pipeline assembly comprising a main gas pipeline and a one-way valve, a first pressure-stabilizing gas storage tank, a switch valve, a first pressure regulating valve and a filter sequentially installed on the main gas pipeline along the gas delivery direction, the gas inlet end of the main gas pipeline being connected to a gas source; Two groups of test pipeline assemblies, the test pipeline assemblies comprising a test air pipe and a first solenoid valve, a second pressure regulating valve, a flow sensor and a pressure sensor sequentially installed on the test air pipe along the gas delivery direction; the air inlet ends of the test air pipes of the two groups of the test pipeline assemblies are respectively connected to the air outlet ends of the main air pipe, the air outlet end of one group of the test air pipes is connected to the air inlet of the first test channel, and the air outlet end of the other group of the test air pipes is connected to the air inlet of the second test channel; The Z-axis driving device includes four guide columns installed on the workbench, a guide plate slidably sleeved on the four guide columns, a cylinder fixing plate fixedly installed on the top of the guide columns, and a downward pressure cylinder installed on the cylinder fixing plate; the top surface of the guide plate is fixedly connected to the lower end of the piston rod of the downward pressure cylinder, and the sealing plate is fixedly installed below the guide plate.

2. The motor sealing test device according to claim 1, characterized in that: It also includes a branch gas pipeline, the gas inlet end of the branch gas pipeline is connected to the main gas pipeline, and the connection between the branch gas pipeline and the main gas pipeline is located at the rear end of the filter along the gas transmission direction; the gas outlet end of the branch gas pipeline is connected to an external gas-using device; A second pressure-stabilizing gas storage tank and a stop valve are installed in sequence on the main gas pipeline along the gas delivery direction. The second pressure-stabilizing gas storage tank is located at the rear end of the connection between the branch gas pipeline and the main gas pipeline along the gas delivery direction; a pressure gauge and a pressure switch are provided on the first pressure regulating valve.

3. The motor sealing test device according to claim 2, characterized in that: Also includes an air source device; The main gas pipeline includes a first hose, a second hose, a first hard pipe, a third hose, a fourth hose, a second hard pipe and a multi-way pipe joint; the one-way valve is arranged on the first hose, and the air inlet end of the first hose is connected to the air outlet of the air source device; the air outlet end of the first hose is connected in sequence through the first pressure-stabilizing gas storage tank, the second hose, the first hard pipe, the third hose, the second pressure-stabilizing gas storage tank, the fourth hose, the second hard pipe and the air inlet end of the multi-way pipe joint; the switch valve, the first pressure regulating valve and the filter are installed on the first hard pipe, and the stop valve is installed on the second hard pipe; The test air pipe includes a third hard tube, a fifth soft tube and a fourth hard tube; the air inlet end of the third hard tube is connected to one of the air outlet ends of the multi-way pipe joint, and its air outlet end is connected to the air inlet end of the fourth hard tube in turn through the fifth soft tube.

4. The motor sealing test device according to claim 1, characterized in that: An outward expansion type sealing device is respectively provided at the position of the air outlet of the first test channel and the second test channel, and the outward expansion type sealing device comprises a sealing shell, a movable block, a plug connector and an elastic sealing ring, one end of the sealing shell is provided with an active cavity, the other end of the sealing shell is provided with a sealing end, and the plug connector is installed on the sealing end; the elastic sealing ring is clamped between the sealing end and the plug connector; the movable block is movably connected in the movable cavity and can move toward or away from the sealing end; the plug connector is connected to the movable block, and the plug connector is used to squeeze the elastic sealing ring after the movable block moves away from the sealing end, so that the elastic sealing ring is deformed outward; The external expansion type sealing device also includes a mounting seat, the sealing housing is mounted on the mounting seat and is spaced apart from the sealing seat; the end of the movable block is connected to the mounting seat through an elastic component; the elastic component is used to provide elastic stress to make the movable block move close to the sealing end; The external expansion sealing device also includes a fixed arm fixedly mounted on the bottom surface of the guide plate, and a driving member fixedly mounted at the lower end of the fixed arm; the power output end of the driving member is connected to the mounting seat.

5. The motor sealing test device according to claim 4, characterized in that: A through hole is provided in the sealing end, and the through hole passes through the movable cavity. A guide column is provided at a portion of the movable block close to the sealing end, and the guide column is movably connected to the through hole. The plug connector is connected to the guide column through a connecting rod; a limiting column is provided at one end of the connecting rod, and a limiting hole is provided in the guide column, and a first limiting step is provided on the inner wall of the limiting hole; a second limiting step is provided on the outer surface of the limiting column, and the limiting column is connected to the limiting hole; the second limiting step is used to abut against the first limiting step to prevent the connecting column from being separated from the guide column.

6. The motor sealing test device according to claim 5, characterized in that: A first sealing ring is clamped between the outer surface of the movable block and the inner wall of the movable cavity; a second sealing ring is clamped between the outer surface of the guide column and the inner wall of the through-hole; a driving channel is provided in the movable block, and the driving channel passes through the movable cavity; the driving channel is used to introduce fluid to drive the movable block to move away from the sealing end; a gasket is sleeved on the outside of the connecting rod, and the gasket is inserted into the through-hole; a clamping block is provided at the sealing end, and the connecting rod is inserted into the clamping block, one end of the connecting rod extends from the clamping block and extends into the through-hole to be connected with the guide column; the other end of the connecting rod extends from the clamping block and is connected to the plug connector; the elastic sealing ring is sleeved on the end of the connecting rod close to the plug connector, and clamped between the clamping block and the plug connector.

7. A testing method for the motor sealing testing device according to claim 1, characterized in that: The following steps are involved: Preparation phase; The motor housing is placed in the accommodating groove of the motor tray, and the Y-axis driving device drives the motor tray to slide on the guide rail along the Y-axis direction. When the motor tray moves to the bottom of the sealing plate, the Z-axis driving device drives the sealing plate to descend in the Z-axis direction, so that the sealing plate blocks the top opening of the motor housing, and the volume filling block is located in the inner cavity of the motor housing; the outlet ends of the two groups of test air pipes are sealed and connected with the air inlets of the first test channel and the second test channel respectively, and the air outlets of the first test channel and the second test channel are connected with the atmosphere respectively; firstly, the switch valve and the first solenoid valve are closed, and the air source is used to inflate the first pressure-stabilizing gas tank through the one-way valve. After the preset inflation time, the switch valve is opened, and the gas is pressure-regulated by the first pressure regulating valve, and then filtered out moisture through the filter; Testing process: block the air outlets of the first test channel and the second test channel, then open the first solenoid valves on each test air pipe, and use the gas after filtering out moisture to inflate the motor housing. During the test, the pressure sensor detects the air pressure of the motor housing, and the pressure sensor sends the detected pressure information to the central controller. The central controller controls the opening of the second pressure regulating valve according to the pressure information fed back by the pressure sensor, so that the test air pipe maintains a constant pressure; the flow rate of the motor housing is detected by the flow sensor. After the preset test time, when the actual flow rate change value within the test time reaches the preset flow rate change value pre-stored in the central controller, the motor housing is qualified, otherwise, it is unqualified; Exhaust stage: After the test is completed, close the switch valve and the first solenoid valve, open the air outlets of the first test channel and the second test channel, and exhaust the gas in the test pipeline.

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