High-speed bearing seat for high-rotating-speed off-line test bench of new energy automobile

Abstract

The utility model discloses a high-speed bearing seat for a high-rotating-speed off-line test bench of a new energy automobile, which relates to the technical field of the high-rotating-speed off-line test bench of the new energy automobile and comprises a bearing seat shell, a rotating main shaft, an inner spacer bush, an outer spacer bush, a bearing pack, a bearing gland and a rotation stopping mechanism. Through advanced calculation and design, the high-speed bearing seat has higher inherent frequency and reasonable bearing rigidity, so that the service life and the stability of the high-speed bearing seat are ensured; a high-precision angular contact ball bearing is selected, and a strict grease filling lubrication mode is adopted, so that lifelong maintenance-free and liquid cooling-free effects can be realized; actual detection shows that the maximum rotating speed can reach 15000 rpm, the maximum torque can reach 200 Nm, and the requirements are met; and meanwhile, the temperature sensor and the vibration sensor are arranged to monitor the working state of the bearing seat at any time, and problems can be reflected on temperature and vibration values in the first time when the problems occur, so that the system can give an alarm in the first time and even shut down to quickly eliminate the problems when the system breaks down.

Description

Technical Field

[0001] The utility model relates to the technical field of high-speed off-line test benches for new energy vehicles, in particular to a high-speed bearing seat for a high-speed off-line test bench for new energy vehicles. Background Art

[0002] With the continuous development of science and technology, the use of electric vehicles in modern society is increasing, and at the same time, various requirements for electric vehicles are also constantly increasing; with the rapid development of new energy vehicles, automotive motors are also required to continue to develop in the direction of high performance, high efficiency, and high power density. Therefore, the upper limit of the drive motor speed continues to increase, and the speed requirements for the offline test benches of new energy vehicles are also getting higher and higher. The latest test needs of users require that the speed can meet 15000rpm and above; due to the high degree of automation of high-speed offline test benches, large data collection, high control accuracy, and high vibration requirements, it is still difficult to make it meet the test speed of 15000rpm and above. Among them, the high-speed bearing seat, one of the key components of the shaft string, can meet the speed of 15000rpm and above, which is a core problem in the prior art. Utility Model Content

[0003] The purpose of the utility model is to provide a high-speed bearing seat for a high-speed off-line test bench of a new energy vehicle, so as to solve the problem that the existing high-speed off-line test bench proposed in the above background technology still has certain difficulties in meeting the test speed of 15000rpm and above, among which the high-speed bearing seat, as one of the key components of the shaft string, can meet the speed of 15000rpm and above, which is one of the core difficult problems.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-speed bearing seat for a high-speed offline test bench of a new energy vehicle, comprising a bearing seat shell and an axially opened shaft mounting through hole at its axis, and a coaxial rotating main shaft is passed through the shaft mounting through hole, and inner and outer spacer sleeves are sleeved on the outer wall of the rotating main shaft in the middle of the shaft mounting through hole, and bearing groups are respectively sleeved on the outer sides of the rotating main shaft at both ends of the inner and outer spacer sleeves, and bearing pressure covers are arranged on the outer sides of the two bearing groups; two anti-rotation mechanisms are arranged at the outer front end of the bearing seat shell through a bracket and are symmetrically arranged with the axis of the rotating main shaft.

[0005] Preferably, bearing seat mounting plates extending to both sides are respectively provided on the outer side of the bearing seat housing near its bottom edge, and each bearing seat mounting plate is provided with two vertical anchor bolt holes, and an anchor bolt is passed through each anchor bolt hole.

[0006] Preferably, an adjustment pad is arranged on the bottom surface of each bearing seat mounting plate.

[0007] Preferably, a manual locking hole is provided at the center of the top surface of the bearing seat shell and a manual locking bolt is provided inside the hole, two lifting rings are provided on the top surface of the bearing seat shell in oblique symmetry with the manual locking hole, and sensor mounting holes are provided on the top surface and side surfaces of the bearing seat shell and temperature sensors and vibration sensors are respectively installed thereon.

[0008] Preferably, the rotating spindle includes a spindle rod inserted into the rotating shaft mounting through hole, a spindle turntable protruding radially outward is provided at the front end of the spindle rod, and a plurality of concave dynamic balancing holes are evenly arranged on the outer side of the spindle turntable.

[0009] Preferably, the bearing group comprises two precision angular contact bearings arranged axially side by side.

[0010] Preferably, the bearing cover at the front end is fixedly connected to the front side of the bearing seat shell by bolts, and the bearing cover at the rear end is fixedly connected to the bearing seat shell by a precision locking nut sleeved on the outside of the main shaft rod.

[0011] Preferably, the anti-rotation mechanism comprises an anti-rotation cylinder, and the piston shaft of the anti-rotation cylinder is connected to a anti-rotation pad.

[0012] Preferably, the maximum speed of the high-speed bearing seat can reach 15000 rpm, and the maximum torque can reach 200 Nm.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model adopts standardized and modular design, and can be adapted to a variety of dynamometers and different test benches; through advanced calculation and design means, the high-speed bearing seat has a higher natural frequency and reasonable bearing stiffness, ensuring its service life and stability; and high-precision angular contact ball bearings are selected, and rigorous grease filling lubrication is adopted to achieve lifelong maintenance-free, and no liquid cooling is required; after actual application testing, the maximum speed can reach 15000rpm, and the maximum torque can reach 200Nm, which meet the application needs of the high-speed offline test bench of new energy vehicles in the market, and the reasonable optimized structure of the shell makes it have a high natural frequency; at the same time, it is equipped with a temperature sensor and a vibration sensor to monitor the working status of the bearing seat at all times. When there is a problem with the bearing seat, it will be reflected in the temperature and vibration values ​​at the first time. The system sets the alarm value for over-temperature or over-vibration, which will issue an alarm or even shut down, ensuring that when a system failure occurs, it can be discovered and eliminated in the first time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an axonometric drawing;

[0016] Figure 2 is the main view;

[0017] Figure 3 It is the left view;

[0018] Figure 4 for Figure 3 A magnified view of middle;

[0019] Figure 5 It is a top view;

[0020] Figure 6 for Figure 5 Cross-sectional view of the middle BB;

[0021] In the figure: bearing seat housing -1, shaft mounting through hole -11, bearing seat mounting plate -12, anchor bolt hole -13, anchor bolt -14, adjustment pad -15, manual locking hole -16, manual locking bolt -17, lifting ring -18, sensor mounting hole -19, rotating spindle -2, spindle rod -21, spindle turntable -22, dynamic balancing hole -23, inner and outer spacers -3, bearing group -4, bearing pressure cover -5, anti-rotation mechanism -6, anti-rotation cylinder -61, anti-rotation pad -62. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution in the embodiments of the present utility model is clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0023] Please refer to Figure 1-6 , Figure 1 It is an axonometric drawing; Figure 2 is the main view; Figure 3 It is the left view; Figure 4 for Figure 3 A magnified view of middle; Figure 5 It is a top view; Figure 6 for Figure 5 Cross-sectional view of BB.

[0024] The utility model provides a high-speed bearing seat for a high-speed offline test bench of a new energy vehicle, which is used for the high-speed offline test bench shaft serial connection; it comprises a bearing seat shell 1, a shaft mounting through hole 11 is axially opened at the inner axis center of the bearing seat shell 1, and a coaxial rotating main shaft 2 is passed through the rotating main shaft mounting through hole 11, and an inner and outer spacer sleeve 3 is sleeved on the outer wall of the rotating main shaft 2 at the middle of the rotating main shaft mounting through hole 11, and bearing groups 4 are respectively sleeved on the outer sides of the rotating main shaft 2 at both ends of the inner and outer spacer sleeves 3, and bearing pressure covers 5 are arranged on the outer sides of the two bearing groups 4 to press the bearing groups 4 to prevent them from falling off.

[0025] The outer side of the bearing seat housing 1 is provided with bearing seat mounting plates 12 extending to both sides near its bottom edge. Each bearing seat mounting plate 12 is provided with two vertical anchor bolt holes 13, and each anchor bolt hole 13 is penetrated with an anchor bolt 14 for positioning and installing the bearing seat. In addition, an adjustment pad 15 is provided on the bottom surface of each bearing seat mounting plate 12.

[0026] A manual locking hole 16 is provided at the center of the top surface of the bearing seat shell 1, and a manual locking bolt 17 is provided inside the bearing seat shell 1. The manual locking bolt 17 is continuously tightened to provide resistance to the rotation of the rotating spindle 2 through the inner and outer spacers 3, so the rotation speed of the rotating spindle 2 can be effectively reduced; two lifting rings 18 are obliquely symmetrically provided with the manual locking hole 16 on the top surface of the bearing seat shell 1 for lifting the high-speed bearing seat; sensor mounting holes 19 are provided on the top surface and side surfaces of the bearing seat shell 1, and temperature sensors and vibration sensors are respectively installed thereon for real-time monitoring of the temperature and vibration status of the bearing to ensure that a system failure can be discovered and eliminated as soon as possible.

[0027] The rotating spindle 2 includes a spindle rod 21 passing through the spindle mounting through hole 11 , a spindle turntable 22 protruding radially outward is provided at the front end of the spindle rod 21 , and a plurality of concave dynamic balancing holes 23 are evenly arranged on the outer side of the spindle turntable 22 .

[0028] The inner and outer spacers 3 are double-layer spacers.

[0029] The bearing assembly 4 includes two precision angular contact bearings arranged axially side by side, which can assist the rotating spindle 2 in high-speed rotation.

[0030] The bearing cover 5 at the front end is fixedly connected to the front side of the bearing seat housing 1 by bolts, and at the same time, the bearing group 4 on the front side is assisted to be tightened; the bearing cover 5 at the rear end is fixedly connected to the bearing seat housing 1 by a precision locking nut sleeved on the outside of the main shaft rod 21, and at the same time, the bearing group 4 on the rear side is assisted to be tightened.

[0031] In addition, two anti-rotation mechanisms 6 are provided at the front end of the outer side of the bearing seat housing 1 through a bracket, which are symmetrically arranged with respect to the axis of the rotating spindle 2. The anti-rotation mechanism 6 adopts pneumatic anti-rotation, including an anti-rotation cylinder 61. The piston shaft of the anti-rotation cylinder 61 is connected to an anti-rotation pad 62. The anti-rotation pad 62 can directly abut against the edge of the spindle turntable 22 under the action of the anti-rotation cylinder 61, thereby assisting in stopping the rotation of the rotating spindle 2.

[0032] When in use, strict assembly specifications must be followed, and the interference fit between the bearing and the shaft, the clearance between the bearing and the bearing seat, and the preload force of the bearing seat must be calculated in advance. At the same time, strict dynamic balancing tests must be performed after assembly.

[0033] The utility model uses advanced calculation and design methods to make the high-speed bearing seat have a higher natural frequency and reasonable bearing stiffness, ensuring its service life and stability; and uses high-precision angular contact ball bearings, and adopts a rigorous grease-filled lubrication method to achieve lifelong maintenance-free, and no liquid cooling is required; after actual application testing, the maximum speed can reach 15000rpm, and the maximum torque can reach 200Nm, meeting the application requirements of high-speed offline testing; at the same time, it is equipped with a temperature sensor and a vibration sensor to monitor the working status of the bearing seat at all times. When there is a problem with the bearing seat, it will be reflected in the temperature and vibration values ​​at the first time. The system sets the alarm value for over-temperature or over-vibration, which will issue an alarm or even shut down, ensuring that when a system failure occurs, it can be discovered and eliminated at the first time.

[0034] Although the embodiments of the utility model have been shown and described, it is obvious that the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, it can be understood by ordinary technicians in this field that all other embodiments obtained by making various changes, modifications, substitutions and variations to these embodiments without departing from the principle and spirit of the utility model and without making creative work, all belong to the scope of protection of the utility model.

Claims

1. A high-speed bearing seat for a high-speed off-line test bench of a new energy vehicle, characterized in that: The invention comprises a bearing seat shell (1) and an axially opened rotating shaft installation through hole (11) at the axis thereof, a coaxial rotating main shaft (2) is passed through the rotating shaft installation through hole (11), inner and outer spacer sleeves (3) are sleeved on the outer wall of the rotating main shaft (2) at the middle of the rotating shaft installation through hole (11), bearing groups (4) are sleeved on the outer sides of the rotating main shaft (2) at both ends of the inner and outer spacer sleeves (3), and bearing pressure covers (5) are arranged on the outer sides of the two bearing groups (4); two anti-rotation mechanisms (6) are arranged symmetrically with respect to the axis of the rotating main shaft (2) through a bracket at the outer front end of the outer side of the bearing seat shell (1).

2. The high-speed bearing seat for the high-speed off-line test bench of new energy vehicles according to claim 1 is characterized in that: The outer side of the bearing seat housing (1) is provided with bearing seat mounting plates (12) extending to both sides near its bottom edge, and each bearing seat mounting plate (12) is provided with two vertical anchor bolt holes (13), and each anchor bolt hole (13) is penetrated with an anchor bolt (14).

3. The high-speed bearing seat for the high-speed off-line test bench of the new energy vehicle according to claim 2 is characterized in that: An adjustment pad (15) is arranged on the bottom surface of each bearing seat mounting plate (12).

4. The high-speed bearing seat for the high-speed off-line test bench of the new energy vehicle according to claim 3 is characterized in that: A manual locking hole (16) is provided at the center of the top surface of the bearing seat shell (1) and a manual locking bolt (17) is provided inside the hole. Two lifting rings (18) are provided on the top surface of the bearing seat shell (1) in oblique symmetry with the manual locking hole (16). Sensor mounting holes (19) are provided on the top surface and side surfaces of the bearing seat shell (1) and a temperature sensor and a vibration sensor are installed thereon respectively.

5. The high-speed bearing seat for the high-speed off-line test bench of the new energy vehicle according to claim 4 is characterized in that: The rotating spindle (2) comprises a spindle rod (21) inserted into the rotating spindle mounting through hole (11), a spindle turntable (22) protruding radially outward is arranged at the front end of the spindle rod (21), and a plurality of inwardly concave dynamic balancing holes (23) are evenly arranged at the outer side of the spindle turntable (22).

6. The high-speed bearing seat for the high-speed off-line test bench of the new energy vehicle according to claim 5 is characterized in that: The bearing group (4) comprises two precision angular contact bearings which are axially arranged side by side.

7. The high-speed bearing seat for the high-speed off-line test bench of the new energy vehicle according to claim 6 is characterized in that: The bearing cover (5) at the front end is fixedly connected to the front side of the bearing seat housing (1) by bolts, and the bearing cover (5) at the rear end is fixedly connected to the bearing seat housing (1) by a precision locking nut sleeved on the outside of the main shaft rod (21).

8. The high-speed bearing seat for the high-speed off-line test bench of the new energy vehicle according to claim 7 is characterized in that: The anti-rotation mechanism (6) comprises an anti-rotation cylinder (61), and the piston shaft of the anti-rotation cylinder (61) is connected to a anti-rotation pad (62).

9. The high-speed bearing seat for the high-speed off-line test bench of the new energy vehicle according to claim 8 is characterized in that: The maximum speed of the high-speed bearing seat can reach 15000rpm, and the maximum torque can reach 200Nm.

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