Environmental test chamber for vehicle high and low temperature impact or dynamometer test in complex environment

Abstract

The invention discloses an environmental test chamber for a vehicle high and low temperature impact or power test in a complex environment, which comprises a partition assembly, a first chamber body, a second chamber body, an underground space and a dynamometer assembly, and is characterized in that the dynamometer assembly is provided with a plurality of groups of power measuring rotating hubs; an adjustable floor assembly is arranged at the communication position of the underground space and the first cabin body, a plurality of cover plates and notches formed between the cover plates are arranged on the floor assembly, and the arc-shaped top of the dynamometer rotating hub is exposed out of the notches; a high and low temperature control system is further arranged in the environment test chamber, one of the first chamber body and the second chamber body is a high temperature chamber, and the other one is a low temperature chamber. According to the environment test chamber, the temperatures of the first chamber body and the second chamber body which are separated are respectively controlled, so that two spaces with great environment temperature difference can be obtained, the environment test chamber can be used for high and low temperature impact tests of a whole vehicle, and can also be used for independently carrying out a dynamometer test of the vehicle; and high and low temperature impact and dynamometer tests can also be carried out at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of large environmental test chambers, and in particular to an environmental test chamber used for high and low temperature impact or dynamometer tests of vehicles in complex environments. Background Art

[0002] An environmental test chamber is an enclosed indoor space used for testing large equipment. For example, when conducting vehicle dynamometer tests in complex climate environments, it is necessary to place it in an environmental test chamber to test the vehicle's performance by simulating various working conditions and environments.

[0003] For general vehicles, it is only necessary to set up an experimental environment in an independent environmental chamber to complete various vehicle tests. However, for some special vehicles, such as certain military and civilian vehicles, special equipment, emergency rescue vehicles, etc., not only independent high-temperature and low-temperature tests are required, but also the impact of drastic changes in environmental factors must be considered. For example, in the scenario of airdropping equipment or vehicles, there will be temperature shock. In order to assess the environmental adaptability under this scenario, the whole vehicle needs to be subjected to high and low temperature shock tests. The existing environmental test chambers do not have the ability to conduct such whole-vehicle tests and can only perform high and low temperature shock tests on automotive parts.

[0004] There are relatively few dynamometers for the above-mentioned special vehicles. Dynamometers are required to have characteristics such as heavy load, multi-axis and multi-drive, flexible wheelbase adjustment, strong environmental adaptability, and resistance to temperature shock. Dynamometers have high requirements for the hub and are difficult to design, manufacture, and install. Moreover, the existing dynamometer system is usually designed for the same type of vehicles, such as light-load and heavy-load vehicles. Different types of vehicles need to be equipped with multiple dynamometer systems, which are not compatible enough. Summary of the Invention

[0005] The purpose of the present invention is to address the problems existing in the prior art and provide an environmental test chamber for high and low temperature impact or dynamometer tests of vehicles in complex environments.

[0006] To achieve the above object, the technical solution adopted by the present invention is: An environmental test chamber for high and low temperature impact or dynamometer testing of vehicles in complex environments, the environmental test chamber being provided with an openable and closable partition assembly, the partition assembly dividing the environmental test chamber into a first chamber body and a second chamber body, an underground space being provided below the first chamber body, a dynamometer assembly being provided in the underground space, and a plurality of dynamometer hubs being provided on the dynamometer assembly; an adjustable floor assembly being provided at the connection between the underground space and the first chamber body, the floor assembly being provided with a plurality of cover plates and slots arranged between the cover plates, through which the arc-shaped tops of the dynamometer hubs are exposed; The environmental test chamber is also equipped with a high and low temperature control system for controlling the temperature of the first chamber and the second chamber. The temperature adjustment range is -65°C to +75°C. When conducting high and low temperature impact tests on vehicles, one of the first chamber and the second chamber is a high temperature chamber and the other is a low temperature chamber.

[0007] The environmental test chamber can separate the entire test chamber into two independent sealed spaces through the setting of the partition assembly. By separately controlling the temperatures of the separated first chamber and the second chamber, two spaces with extremely different ambient temperatures can be obtained, so that the environmental test chamber can not only carry out high and low temperature impact tests on the entire vehicle, but also carry out dynamometer tests on the vehicle alone, and can also carry out high and low temperature impact and dynamometer tests at the same time.

[0008] For this environmental test chamber, there are actually three larger independent spaces, namely the first cabin, the second cabin and the underground space. The three spaces have their own functions. The first cabin and the second cabin can accommodate vehicles, and the underground space is mainly used to set up the dynamometer assembly so that the dynamometer hub can perform dynamometer tests on the vehicle in the cabin above.

[0009] Furthermore, the partition assembly includes a fixed plate frame connected to the inner wall of the environmental test chamber, and a split insulation sliding door that can be opened and closed is provided in the fixed plate frame. Slide grooves are provided at the upper and lower parts of the inner periphery of the fixed plate frame, and accommodating grooves are provided on both sides of the inner periphery of the fixed plate frame. The upper and lower ends of the split insulation sliding door are respectively installed in the slide grooves, and one side of the split insulation sliding door is located in the accommodating groove, so that the partition assembly has better insulation and heat breaking capabilities.

[0010] Furthermore, the double-leaf heat-insulating sliding doors are electrically driven sliding doors, and the opposite end faces of the double-leaf heat-insulating sliding doors are provided with mutually cooperating sealing slots and sealing strip structures; two front and rear groups of the double-leaf heat-insulating sliding doors are provided in the fixed plate frame, and the door gaps of the two groups of the double-leaf heat-insulating sliding doors are staggered to further enhance their heat insulation effect.

[0011] Furthermore, a plurality of slide rails are provided in the underground space, a plurality of slide seats are arranged at intervals on the slide rails, a pair of the dynamometer assemblies are provided on each of the slide seats, and the dynamometer hubs on each pair of the dynamometer assemblies are coaxially arranged.

[0012] Furthermore, the dynamometer assembly includes a support seat, a hub main shaft is provided on the support seat, a stator assembly is provided on the hub main shaft, and a dynamometer hub rotatably mounted on the hub main shaft, a permanent magnet compatible with the stator assembly is provided inside the dynamometer hub, one end of the hub main shaft is connected to a torque arm, a connecting ear is provided at the end of the torque arm, and an encoder is also connected to the other end of the hub main shaft; a tension seat is also provided on the outer side of the support seat, a torque sensor is provided on the tension seat, one end of the torque sensor is connected to a force transmission rod, and the force transmission rod is connected to the connecting ear.

[0013] Furthermore, the stator assembly includes a stator core arranged on the outer periphery of the hub main shaft, and a stator winding is provided on the stator core; the dynamometer hub includes an outer hub and an inner hub arranged coaxially, and the outer hub and the inner hub are fixedly connected by a plurality of annular plates; the upper arc surface of the outer hub is exposed from the slot and is used to support the vehicle to be tested, and hub end covers are respectively provided at both ends of the inner hub, and the hub end covers are installed on the hub main shaft through bearings, and the permanent magnet is attached to the inner periphery of the inner hub corresponding to the stator core.

[0014] Furthermore, the floor assembly includes a plurality of ground beams, which are supported on the underground space by a plurality of brackets respectively. The sides of adjacent ground beams are respectively provided with support platforms. The two ends of the cover plate are respectively overlapped on the support platforms of two adjacent ground beams and fixed by connecting parts. Several cover plates are closely arranged in sequence along the length direction of the ground beams, and sealing strips are respectively laid in the gaps between the two ends of the cover plate and the ground beams.

[0015] Furthermore, the cover plate is a hollow rectangular box structure with stepped overlapping structures on both sides in the width direction, and thermal insulation gaskets are provided at the stepped overlapping structures; the interior of the rectangular box structure is filled with thermal insulation material, and the outer periphery of the cover plate is also provided with a thermal insulation coating.

[0016] Furthermore, a hub cover plate is provided between the cover plates, the notch is provided on the hub cover plate, a connecting support plate is provided below the hub cover plate, one side of the connecting support plate is an arc-shaped structure and maintains a gap with the outer periphery of the dynamometer hub, and the other side is connected to the dynamometer assembly; a removable arc-shaped guard plate is also provided above the notch.

[0017] Furthermore, the environmental test chamber is also provided with a sunlight system and a wind system. The sunlight system includes a hanger arranged on the top of the environmental test chamber and a plurality of full-spectrum light sources installed under the hanger; the wind system includes a movable large fan, and the large fan has a blowing capacity of at least not less than 1.5m / s.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. The environmental test chamber can separate the entire test chamber into two independent sealed spaces through the setting of the partition assembly. By separately controlling the temperatures of the separated first cabin and the second cabin, two spaces with extremely different ambient temperatures can be obtained, so that the environmental test chamber can not only perform high and low temperature impact tests on the entire vehicle, but also perform dynamometer tests on the vehicle alone, and can also perform high and low temperature impact and dynamometer tests at the same time; 2. For this environmental test chamber, there are actually three larger independent spaces. The first cabin and the second cabin can accommodate vehicles, and the underground space is mainly used to set the dynamometer assembly so that the dynamometer hub can perform dynamometer tests on the vehicle in the upper cabin; in addition to playing the role of separating the space, the partition assembly and the floor assembly also need better sealing and heat insulation functions. ; 3. The floor assembly must also have strong supporting capabilities, as well as detachable and adjustable functions, to stably support the vehicle and better cooperate with the dynamometer assembly to perform dynamometer tests; 4. This environmental test chamber not only has the testing capabilities of high temperature, low temperature, humidity and temperature shock, but also has functions such as ventilation, wind testing and solar thermal effects; 5. The dynamometer hub integrates the rotor into its own structure, and there is no need to arrange the rotor assembly additionally. At the same time, the hub main shaft itself does not rotate, but serves as a support shaft to support the entire stator assembly and the dynamometer hub together. The stator assembly is used to directly drive the dynamometer hub to rotate. There is no drive shaft and its load, which reduces work waste and energy loss. Under the same conditions, the power will be greater, which avoids the cantilever support structure and has higher support stability. It is also conducive to setting up multiple sensors to detect dynamometer data. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an overall schematic diagram of an environmental test chamber for high and low temperature impact or dynamometer testing of vehicles in complex environments according to the present invention; Figure 2 Schematic diagram of the underground space cross section of the environmental test chamber of the present invention; Figure 3 Schematic top view of the floor assembly of the environmental test chamber of the present invention; Figure 4 This is a three-dimensional schematic diagram of the components arranged in the underground space of the environmental test chamber of the present invention; Figure 5 Schematic diagram of the partition assembly of the environmental test chamber of the present invention; Figure 6 A schematic diagram of the connection of the biparting heat-insulating sliding door of the present invention; Figure 7 Another schematic diagram of the connection of the split heat-insulating sliding door of the present invention; Figure 8 A three-dimensional schematic diagram of the dynamometer assembly of the present invention Figure 1 ; Figure 9 A three-dimensional schematic diagram of the dynamometer assembly of the present invention Figure 2 ; Figure 10 is a schematic cross-sectional view of a dynamometer assembly of the present invention; Figure 11 Schematic diagram of the cover overlap of the present invention Figure 1 ; Figure 12 Schematic diagram of the cover overlap of the present invention Figure 2 ; Figure 13 is a schematic cross-sectional view of the cover plate of the present invention; In the figure: 1. First cabin; 2. Second cabin; 3. Partition assembly; 301. Fixed plate frame; 302. Biparting thermal insulation sliding door; 4. Underground space; 5. Floor assembly; 501. Ground beam; 502. Bracket; 503. Cover plate; 504. Hub cover plate; 505. Notch; 6. Dynamometer hub; 601. Outer hub; 602. Inner hub; 603. Ring plate; 604. Hub end cover; 7. Slide rail; 8. Slide seat; 9. Support seat; 10. Hub main shaft; 11. Stator assembly; 12. Permanent Magnet; 13. Bearing; 14. Torque arm; 15. Tension seat; 16. Torque sensor; 17. Force transmission rod; 18. Encoder; 19. Slide; 20. Receiving groove; 21. Sealing slot; 22. Sealing insert structure; 23. Elastic rubber pad; 24. Sealing strip; 25. Insulation material; 26. Connecting support plate; 27. Support platform; 28. Slope structure; 29. ​​Mounting wedge; 30. Connecting hole; 31. Strip hole; 32. Hanger; 33. Full-spectrum light source; 34. Large fan. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," etc., etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] like Figures 1 to 13 As shown, an environmental test chamber for high and low temperature impact or dynamometer testing of vehicles in complex environments is provided. The environmental test chamber is provided with an openable and closable partition assembly 3, which separates the environmental test chamber into a first chamber 1 and a second chamber 2. An underground space 4 is provided below the first chamber 1. A dynamometer assembly is provided in the underground space 4, and multiple sets of dynamometer hubs 6 are provided on the dynamometer assembly. An adjustable floor assembly 5 is provided at the connection between the underground space 4 and the first chamber 1. The floor assembly 5 is provided with several cover plates 503 and several notches 505 arranged between the cover plates 503. The arc-shaped tops of the dynamometer hubs 6 are exposed through the notches 505. The environmental test chamber is also provided with a high and low temperature control system for controlling the temperature of the first chamber 1 and the second chamber 2. The temperature adjustment range is -65°C to +75°C. When conducting high and low temperature impact tests on vehicles, one of the first chamber 1 and the second chamber 2 is a high temperature chamber and the other is a low temperature chamber.

[0023] The environmental test chamber can separate the entire test chamber into two independent sealed spaces through the setting of the partition assembly. By separately controlling the temperatures of the separated first chamber 1 and the second chamber 2, two spaces with extremely different ambient temperatures can be obtained, so that the environmental test chamber can not only carry out high and low temperature impact tests on the entire vehicle, but also carry out dynamometer tests on the vehicle alone, and can also carry out high and low temperature impact and dynamometer tests at the same time.

[0024] For this environmental test chamber, there are actually three larger independent spaces, namely the first cabin 1, the second cabin 2 and the underground space 4. The three spaces have their own functions. The first cabin 1 and the second cabin 2 can accommodate vehicles, and the underground space 4 is mainly used to set up the dynamometer assembly so that the dynamometer hub can perform dynamometer tests on the vehicles in the cabin above.

[0025] The first cabin 1 and the second cabin 2 have high requirements for temperature. Therefore, in addition to playing the role of separating the space, the partition assembly 3 and the floor assembly 5 also need better sealing and heat insulation functions. For the partition assembly 3, it is necessary to have the function of opening and closing, and open the partition when necessary to connect the two cabin spaces; for the floor assembly 5, it also needs to have strong supporting capabilities, as well as detachable and adjustable functions, to stably support the vehicle and better cooperate with the dynamometer assembly to perform dynamometer tests.

[0026] The reason why the floor assembly 5 needs to be insulated is that, on the one hand, it is to prevent the heat generated by the dynamometer assembly during operation from rising into the first cabin, which would have an adverse effect on the temperature regulation of the first cabin; on the other hand, it is to prevent the high temperature or severe cold environment simulated by the first cabin from having a negative impact on the dynamometer assembly in the underground space, affecting the normal operation of the dynamometer assembly. The dynamometer assembly also has its normal operating temperature requirements, which cannot be too high or too low.

[0027] In this embodiment, the internal clear space dimensions of the environmental test chamber are at least 28,000 × 6,000 × 6,000 (D depth × W width × H height, in mm). The dimensions of the first chamber 1 are ≥ 14,000 × 6,000 × 6,000 mm, and the dimensions of the second chamber 2 are ≥ 14,000 × 6,000 × 6,000 mm. The two chambers can operate independently or in combination. During temperature shock testing, one chamber serves as a high-temperature chamber and the other as a low-temperature chamber, each regulated to the desired temperature range. When required, the partition assembly is opened to allow low temperatures to impact a vehicle in a high-temperature environment, or vice versa. Vehicle performance is tested under these drastic temperature fluctuations.

[0028] The temperature adjustment range of both the first and second compartments 1 and 2 is continuously adjustable between -65°C and +75°C. When unloaded or in a constant state, the temperature fluctuation is ≤1.0°C, the temperature deviation is ≤±2.0°C, and the temperature uniformity is ≤2°C. The temperature rise time from 5°C to 75°C is controlled within 4 hours (under a 60t load or static conditions), and the temperature fall time from 25°C to -65°C is controlled within 6 hours (under a 60t load or static conditions). During impact use, the temperature conversion time is completed within 60 seconds, and the temperature recovery time is 30 minutes (under a 16t vehicle load, -60°C to +70°C). Temperature recovery conditions: high temperature exposure to +70°C, low temperature exposure to -60°C, exposure time ≥2 hours, and a 16t vehicle load.

[0029] In addition to temperature regulation, a humidity system is also configured to achieve functions such as cooling, heating, humidification, and dehumidification. The relative humidity range is 20% to 98% (20°C to 60°C), with a high temperature and high humidity point (60°C, 95%RH), a humidity deviation of ±3%RH, a humidity uniformity of 3%RH, and a humidity fluctuation of ±3%RH.

[0030] The high and low temperature environments of the first cabin 1 and the second cabin 2 are achieved through large-scale industrial refrigeration equipment or heating equipment. Intelligent control functions are adopted to automatically open or close the corresponding working units and adjust the working status of each unit according to real-time conditions (such as temperature and humidity) and the working conditions of the test samples in the test chamber, thereby achieving automatic operation and precise control of various temperatures and humidity.

[0031] Furthermore, the partition assembly 3 includes a fixed plate frame 301 connected to the inner wall of the environmental test chamber, and a split insulation sliding door 302 that can be opened and closed is provided in the fixed plate frame 301. Slide grooves 19 are respectively provided on the upper and lower parts of the inner periphery of the fixed plate frame 301, and receiving grooves 20 are provided on both sides of the inner periphery of the fixed plate frame 301. The upper and lower ends of the split insulation sliding door 302 are respectively installed in the slide grooves 19, and one side of the split insulation sliding door 302 is located in the receiving groove 20.

[0032] The environmental test chamber and the fixed plate frame can be made together during construction, or they can be installed later. The inner wall of the chamber and the fixed plate frame are both made of thermal insulation materials; the fixed plate frame 301 serves as the door frame of the split-open thermal insulation sliding door, and can be connected to and installed with the split-open thermal insulation sliding door 302. The accommodating groove therein can accommodate the door panel. The setting of the sliding groove 19 not only plays the role of sliding and guiding, but also is to close the door panel on three sides. When the split-open thermal insulation sliding door 302 is closed, a sealing structure of the entire surface can be formed to reduce the flow of air or heat from the gap.

[0033] Furthermore, the double-opening heat-insulating sliding door 302 is an electrically driven sliding door having components such as an electric motor, a reducer, and a control system. Mature products available on the market can be directly selected or appropriate modifications can be made to the selected products to adapt to this environmental test chamber. The opening and closing of the double-opening heat-insulating sliding door can be controlled in the control room through electric control, and the opening or closing time can be controlled within 30 seconds.

[0034] The opposing end faces of the split-type thermally insulated sliding door 302 are equipped with mating sealing slots 21 and sealing strips 22. This arrangement creates a labyrinthine seal when the split-type thermally insulated sliding door 302 is closed, effectively reducing gas flow. Multiple rings of elastic rubber pads 23 are also located on the inner periphery of the fixed plate frame 301, distributed on both the front and back exterior surfaces of the split-type thermally insulated sliding door 302. These pads consistently abut against the exterior surfaces of the split-type thermally insulated sliding door 302, forming a seal.

[0035] In some embodiments, two sets of front and rear split insulating sliding doors 302 are provided in the fixed plate frame 301, which can further enhance the thermal insulation and heat preservation capabilities of the entire partition assembly; the door gaps of the two sets of split insulating sliding doors 302 are staggered to avoid convection heat exchange in the door gaps.

[0036] Furthermore, a plurality of slide rails 7 are provided in the underground space 4, and a plurality of slide seats 8 are arranged at intervals on the slide rails 7. A pair of dynamometer assemblies are provided on each of the slide seats 8, and the dynamometer hubs 6 on each pair of dynamometer assemblies are coaxially arranged.

[0037] The slide 8 serves as both a supporting component and a sliding component, and can better support the dynamometer assembly. The spacing between two adjacent slides 8 can be reasonably controlled, and the dynamometer assembly can be adaptively adjusted according to the load and wheelbase conditions of the vehicle being tested, so that it can be applied to various types of vehicles.

[0038] The two dynamometer assemblies on each slide 8 are basically arranged symmetrically, and the support heights are also the same; each slide 8 is arranged across multiple slide rails, such as three slide rails, and at least one slide rail is provided with a driving component for driving the slide to move, and the other slide rails are driven. For heavy loads, a driving component can also be provided on each slide rail to ensure the driving force.

[0039] Specifically, the slide rail 7 is provided with a track, a rack is provided on one side of the track, a chute body is provided below the slide 8, the chute body is provided on the track, a motor-driven shaft is provided on one side of the chute body, a gear is provided on the shaft, and the gear is engaged with the rack. The gear rotates to move along the rack, thereby driving the entire slide to move along the slide rail. In practice, other types of drive methods may also be adopted.

[0040] Furthermore, the dynamometer assembly includes a support base 9, on which is provided a hub spindle 10, on which is provided a stator assembly 11, and a dynamometer hub 6 rotatably mounted on the hub spindle 10, wherein the interior of the dynamometer hub 6 is provided with a permanent magnet 12 adapted to the stator assembly 11, one end of the hub spindle 10 is connected to a torque arm 14, and the end of the torque arm 14 is provided with a connecting ear, and the other end of the hub spindle 10 is also connected to an encoder 18; a tension seat 15 is also provided on the outer side of the support base 9, and a torque sensor 16 is provided on the tension seat 15, and one end of the torque sensor 16 is connected to a force transmission rod 17, and the force transmission rod 17 is connected to the connecting ear.

[0041] The dynamometer assembly with this structural arrangement has the characteristics of heavy load, high power and high torque. Combined with the arrangement of the environmental test chamber, it can be used to test large vans, trucks or engineering vehicles, which is conducive to studying the performance of such vehicles in hot or cold areas.

[0042] The dynamometer assembly does not require a dedicated large drive motor to drive the dynamometer hub 6 to rotate. Instead, a more reliable permanent magnet direct drive structure is designed by utilizing the arrangement relationship between the dynamometer hub 6 itself and the hub main shaft 10. The dynamometer hub 6 integrates the rotor into its own structure, eliminating the need for an additional rotor assembly. The hub main shaft 10 itself does not rotate, but serves as a support shaft to support the entire stator assembly 11 and the dynamometer hub 6. The stator assembly 11 is used to directly drive the dynamometer hub 6 to rotate. Without a transmission shaft and its load, work waste is reduced, energy loss is minimal, and power is greater under the same conditions. Both ends of the hub main shaft 10 are supported on the support seat 9 and do not rotate with the dynamometer hub 6. This avoids the need for a cantilever support structure, improves support stability, and facilitates the configuration of the measurement assembly to detect test data.

[0043] The torque arm 14 is arranged horizontally, and the force transmission rod 17 is arranged vertically. When the hub spindle 10 is subjected to force, torque is generated. The torque sensor 16 can sensitively capture changes in force and record data. The encoder 18 is connected to the dynamometer hub 6 through a pulley assembly, allowing the encoder 18 to obtain rotation-related data of the dynamometer hub, such as rotational speed, angular velocity, and rotational position.

[0044] Furthermore, the stator assembly 11 includes a stator core arranged on the outer periphery of the hub main shaft, and a stator winding is provided on the stator core; the dynamometer hub 6 includes an outer hub 601 and an inner hub 602 arranged coaxially, and the outer hub 601 and the inner hub 602 are fixedly connected by a plurality of annular plates 603; the upper arc surface of the outer hub 601 is exposed from the slot 505, which is used to support the vehicle to be tested, and hub end covers 604 are respectively provided at both ends of the inner hub 602, and the hub end covers 604 are mounted on the hub main shaft 10 through a bearing member 13, and the permanent magnet 12 is attached to the inner periphery of the inner hub 602 corresponding to the stator core.

[0045] The axial dimension of the outer hub 601 is greater than that of the inner hub 602. The inner hub 602 can be installed on the hub main shaft 10 through the hub end cover 604 connected to it. With the arrangement of the bearing parts, the inner hub 602 and the outer hub 601 can rotate synchronously around the hub main shaft 10. The permanent magnet is arranged on the inner periphery of the inner hub, and the inner hub can be driven to rotate under the action of the magnetic field, thereby driving the outer hub to rotate together, and can fully utilize the internal space of the inner hub to reduce the axial length.

[0046] Furthermore, the floor assembly 5 includes multiple ground beams 501, which are supported on the underground space 4 by multiple brackets 502 respectively. The sides of adjacent ground beams 501 are respectively provided with support platforms 27. The two ends of the cover plate 503 are respectively overlapped on the support platforms 27 of two adjacent ground beams and fixed by connecting parts. Several cover plates 503 are closely arranged in sequence along the length direction of the ground beam 501, and sealing strips 24 are respectively laid in the gaps between the two ends of the cover plate 503 and the ground beam 501.

[0047] This arrangement facilitates the removal and installation of the cover plate 503. When the position of the dynamometer hub needs to be adjusted, that is, when the slide moves on the rail, the cover plate within its range of movement can be removed and, after adjusting its position, placed back in place. The support platform 27 facilitates the overlapping of the cover plates, and bolts can be used to further ensure the stability of the connection. The cover plates 503 are all high-strength metal components, capable of supporting vehicles and allowing them to travel above them.

[0048] There will be an installation gap between the laid cover plate 503 and the ground beam 501 (the bolts can be screwed through this gap). The use of the sealing strip 24 can form a good seal at this location to play a role in heat insulation. The sealing strip 24 is a "T"-shaped porous deformable strip.

[0049] In some embodiments, the support platform 27 is provided with a plurality of connecting holes 30, and the lower edge of the end of the cover plate 503 is provided with a slope structure 28. When the cover plate 503 is overlapped on the support platform 27, a wedge-shaped mounting wedge block 29 can be used to press the slope structure 28. The mounting wedge block 29 is provided with a strip hole 31. The mounting wedge block 29 can be fixed by connecting the strip hole 31 and the connecting hole 30 with bolts or screws, that is, the cover plate 503 is fixed.

[0050] Furthermore, the cover plate 503 is a hollow rectangular box structure filled with thermal insulation material 25, and the outer periphery of the cover plate 503 is also provided with a thermal insulation coating. Due to load-bearing and support requirements, the cover plate 503 is essentially a high-strength metal component. To ensure heat transfer from smaller metal components and to isolate heat exchange between the underground space and the cabin, the thermal insulation material 25 and the thermal insulation coating are provided. The thermal insulation material 25 can be a polyurethane foam material. The thermal insulation coating is primarily applied to the lower and side surfaces of the cover plate, while the upper surface of the cover plate is coated with a wear-resistant coating or a colored anti-corrosion paint layer.

[0051] A stepped overlap structure is provided on both sides of the cover plate 503 in the width direction, and a thermal insulation gasket is provided at the stepped overlap structure; such a setting can not only improve the strength and stability of the overlap, but also form a bent seam, and combined with the setting of the thermal insulation gasket, it can ensure the sealing and thermal insulation capacity of the joint.

[0052] Furthermore, a hub cover plate 504 is provided between the cover plates 503, the hub cover plate 504 is provided with the notch 505, and a connecting support plate 26 is provided below the hub cover plate 504. One side of the connecting support plate 26 is an arc-shaped structure and maintains a gap with the outer periphery of the dynamometer hub, and the other side is connected to the dynamometer assembly; a removable arc-shaped guard plate is also provided above the notch 505 to facilitate the passage of vehicles and protect the unused dynamometer hub.

[0053] The width of the hub cover plate 504 is larger than that of the cover plate 503. Its main function is to shield the outer hub 601 and provide strong support near the outer hub. Due to the large radius of the outer hub 601, only a small part of the arc surface is exposed to contact the vehicle tire (enough to allow the vehicle to drive onto it and stably support the tire). However, the dynamometer hub at this position requires a certain amount of space, and the cover plate is not suitable for placement there. Therefore, the hub cover plate is provided. Not only are the two ends of the hub cover plate overlapped on the support platform, but the connecting support plate below it can also be connected to the support base.

[0054] Furthermore, the environmental test chamber is also provided with a sunlight system and a wind system. The sunlight system includes a hanger 32 arranged on the top of the environmental test chamber, and a plurality of full-spectrum light sources 33 installed below the hanger 32, such as full-spectrum metal halide lamps, with a spectral range of 280 to 3000 nm, a vertical distance of about 1500 mm from the reference plane, an illumination area of ​​about 12 m long and 4 m wide, and an adjustable height range of 1600 mm to 5500 mm. Such a setting can simulate solar radiation (0 to 1120 ± 47 W / m2) W / m², and is steplessly adjustable and can be controlled in groups and units.

[0055] The wind system includes a large, movable fan 34 with a blowing speed of at least 1.5 m / s. It also has fresh air requirements to meet the 1000kW equipment test, with a fresh air volume of ≥6000 m³ / h. It primarily consists of a dehumidifier, control device, micro-pressure differential sensor, refrigeration unit, variable-frequency blower, piping, and fresh air box.

[0056] Through the above arrangement, this environmental test chamber not only has the testing capabilities of high temperature, low temperature, damp heat, and temperature shock, but also has functions such as ventilation, wind testing, and solar thermal effects.

[0057] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. Environmental test chamber for high and low temperature impact or dynamometer test of vehicles in complex environments, characterized by: The environmental test chamber is provided with an openable and closable partition assembly, which separates the environmental test chamber into a first chamber body and a second chamber body. An underground space is provided below the first chamber body, in which a dynamometer assembly is provided, and a plurality of dynamometer hubs are provided on the dynamometer assembly. An adjustable floor assembly is provided at the connection between the underground space and the first chamber body, and the floor assembly is provided with a plurality of cover plates and slots arranged between the cover plates, through which the arc-shaped tops of the dynamometer hubs are exposed. The environmental test chamber is also equipped with a high and low temperature control system for controlling the temperature of the first chamber and the second chamber. The temperature adjustment range is -65°C to +75°C. When conducting high and low temperature impact tests on vehicles, one of the first chamber and the second chamber is a high temperature chamber and the other is a low temperature chamber.

2. The environmental test chamber for high and low temperature impact or dynamometer testing of vehicles in complex environments according to claim 1, characterized in that: The partition assembly includes a fixed plate frame connected to the inner wall of the environmental test chamber, and a split insulation sliding door that can be opened and closed is provided in the fixed plate frame. Slide grooves are respectively provided on the upper and lower parts of the inner periphery of the fixed plate frame, and accommodating grooves are provided on both sides of the inner periphery of the fixed plate frame. The upper and lower ends of the split insulation sliding door are respectively installed in the slide grooves, and one side of the split insulation sliding door is located in the accommodating groove.

3. The environmental test chamber for high and low temperature impact or dynamometer testing of vehicles in complex environments according to claim 2, characterized in that: The split heat-insulating sliding doors are electrically driven sliding doors, and the opposite end faces of the split heat-insulating sliding doors are provided with mutually cooperating sealing slots and sealing strip structures; two front and rear groups of the split heat-insulating sliding doors are provided in the fixed plate frame, and the door gaps of the two groups of the split heat-insulating sliding doors are staggered.

4. The environmental test chamber for high and low temperature impact or dynamometer testing of vehicles in complex environments according to claim 1, characterized in that: A plurality of slide rails are provided in the underground space, a plurality of slide seats are arranged at intervals on the slide rails, a pair of dynamometer assemblies are provided on each of the slide seats, and the dynamometer hubs on each pair of dynamometer assemblies are coaxially arranged.

5. The environmental test chamber for high and low temperature impact or dynamometer testing of vehicles in complex environments according to claim 1, characterized in that: The dynamometer assembly includes a support base, a hub main shaft is provided on the support base, a stator assembly is provided on the hub main shaft, and a dynamometer hub rotatably mounted on the hub main shaft, a permanent magnet compatible with the stator assembly is provided inside the dynamometer hub, one end of the hub main shaft is connected to a torque arm, the end of the torque arm is provided with a connecting ear, and the other end of the hub main shaft is also connected to an encoder; a tension seat is also provided on the outer side of the support base, a torque sensor is provided on the tension seat, one end of the torque sensor is connected to a force transmission rod, and the force transmission rod is connected to the connecting ear.

6. The environmental test chamber for high and low temperature impact or dynamometer testing of vehicles in complex environments according to claim 5, characterized in that: The stator assembly includes a stator core arranged on the outer periphery of the hub main shaft, and a stator winding is provided on the stator core; the dynamometer hub includes an outer hub and an inner hub arranged coaxially, and the outer hub and the inner hub are fixedly connected by a plurality of annular plates; the upper arc surface of the outer hub is exposed from the slot and is used to support the vehicle to be tested, and hub end covers are respectively provided at both ends of the inner hub, and the hub end covers are mounted on the hub main shaft through bearings, and the permanent magnet is attached to the inner periphery of the inner hub corresponding to the stator core.

7. The environmental test chamber for high and low temperature impact or dynamometer testing of vehicles in complex environments according to claim 1, characterized in that: The floor assembly includes multiple ground beams, which are supported on the underground space by multiple brackets. Support platforms are provided on the sides of adjacent ground beams. The two ends of the cover plate are respectively overlapped on the support platforms of two adjacent ground beams and fixed by connecting parts. Several cover plates are closely arranged in sequence along the length direction of the ground beams, and sealing strips are laid in the gaps between the two ends of the cover plate and the ground beams.

8. The environmental test chamber for high and low temperature impact or dynamometer testing of vehicles in complex environments according to claim 7, characterized in that: The cover plate is a hollow rectangular box structure with stepped overlapping structures on both sides in the width direction, and thermal insulation gaskets are provided at the stepped overlapping structures; the interior of the rectangular box structure is filled with thermal insulation material, and the outer periphery of the cover plate is also provided with a thermal insulation coating.

9. The environmental test chamber for high and low temperature impact or dynamometer testing of vehicles in complex environments according to claim 1, characterized in that: A hub cover plate is also provided between the cover plates, the notch is provided on the hub cover plate, a connecting support plate is provided below the hub cover plate, one side of the connecting support plate is an arc-shaped structure and maintains a gap with the outer periphery of the dynamometer hub, and the other side is connected to the dynamometer assembly; a removable arc-shaped guard plate is also provided above the notch.

10. The environmental test chamber for high and low temperature impact or dynamometer testing of vehicles in complex environments according to claim 1, characterized in that: The environmental test chamber is also equipped with a sunlight system and a wind system. The sunlight system includes a hanger arranged on the top of the environmental test chamber and several full-spectrum light sources installed below the hanger; the wind system includes a movable large fan, which has a blowing capacity of at least 1.5m / s.

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