Test bed for CT machine bearing
By designing a test bench with brackets, bearing mounting mechanisms and testing mechanisms, the simulation and testing problems of CT machine bearings at high speeds were solved, accurate loading was achieved and the operating burden was reduced, meeting the reliability test requirements of CT machine bearings.
Patent Information
- Application Number
- CN202423004718.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-12-05
AI Technical Summary
Existing technologies make it difficult to simulate the operating conditions of CT machine bearings at high speeds, and the noise and vibration of the test bench cannot meet the performance requirements of the CT machine, resulting in inaccurate bearing reliability tests.
A test bench including a bracket, a bearing mounting mechanism, a bearing testing mechanism and an electronic control box was designed. Through components such as the bearing mounting plate, the shaft mounting plate, the driving and driven end shafts, the bearing drive motor and the counterweight base plate, accurate simulation and loading of the CT machine bearings can be achieved, reducing the operating burden.
It realizes accurate testing of CT machine bearings under different conditions, meets the requirements of high speed, low noise and low vibration, and improves test efficiency and reliability.
Smart Images
Figure CN223400612U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a test bench for CT machine bearings. Background Art
[0002] A CT machine consists of two main parts: the gantry and the table. The gantry's main frame includes the rotor and stator, which are connected by bearings. As clinical requirements for scanning speeds continue to increase, so too are the performance requirements for the main frame. Currently, the core performance requirements for CT machines are as follows:
[0003] (1) Higher speed, the rotor speed reaches 120rpm.
[0004] (2) Angle and position positioning accuracy: at a higher rotation speed, the frame has no obvious vibration in the horizontal rotation plane - XY axis and the vertical rotation plane - Z axis.
[0005] (3) Low noise, the noise does not exceed 65dB at a speed of 120rpm.
[0006] (4) Long life.
[0007] Therefore, a test bench that can simulate the CT machine frame is needed to verify the various performances of the CT machine bearings. The test bench should have the following performances:
[0008] (1) The speed reaches 120 rpm or above;
[0009] (2) The test bench noise level is lower than 65dB under any circumstances;
[0010] (3) The test bench can be tilted ±30°. Utility Model Content
[0011] The purpose of the present invention is to overcome the defects of the prior art and provide a test bench for CT machine bearings, which can meet the reliability test requirements of CT machine bearings.
[0012] The purpose of the utility model is achieved as follows: a test bench for CT machine bearings, including a bracket, a bearing mounting mechanism, a bearing testing mechanism and an electric control box; wherein,
[0013] The bracket includes a base and two support plates symmetrically and vertically fixed on the top surfaces of the two ends of the base, and the upper part of the two support plates is respectively provided with a coaxial shaft hole;
[0014] The bearing mounting mechanism includes a circular bearing mounting plate, two rotating shaft mounting plates symmetrically connected to the outer end surfaces of the bearing mounting plate, a driving end shaft mounted on the outer end surface of one rotating shaft mounting plate, and a driven end shaft mounted on the outer end surface of the other rotating shaft mounting plate and coaxial with the driving end shaft; a motor through-hole is defined in the center of the bearing mounting plate, and a plurality of connecting holes are defined on the edge surface of the bearing mounting plate, which correspond one-to-one to the plurality of mounting holes on the outer ring end surface of the CT machine bearing, so that the CT machine bearing is mounted on the front surface of the bearing mounting plate; the driving end shaft and the driven end shaft are each inserted into the axial holes of the two support plates of the bracket through a bearing seat, one-to-one;
[0015] The bearing testing mechanism includes a bearing drive motor, a counterweight base plate, a plurality of counterweight plates and a mounting plate drive motor;
[0016] The bearing drive motor is installed at the back center of the bearing mounting plate, and the rotating shaft of the bearing drive motor is inserted into the motor through-hole of the bearing mounting plate;
[0017] The counterweight base plate is mounted on the front side of the inner ring of the CT machine bearing, and the counterweight base plate is mounted on the rotating shaft of the bearing drive motor through a spline shaft and a spline sleeve;
[0018] A plurality of counterweight plates are sequentially mounted on the front side of the counterweight base plate;
[0019] The mounting plate driving motor is mounted on the outer end of the driving end shaft through a rotary reducer and is fixed to the outer side surface of a support plate;
[0020] The electric control box is installed at the lower part of the outer side surface of another support plate, and a touch screen is installed on the top surface of the electric control box through a touch screen bracket. The electric control box is electrically connected to the bearing drive motor, the mounting plate drive motor and the touch screen respectively.
[0021] The above-mentioned test bench for CT machine bearings, wherein the base of the bracket includes two main crossbeams, two main longitudinal beams connected at both ends of the two main crossbeams, a plurality of longitudinal reinforcing ribs spanning the middle parts of the two main crossbeams, two flat mounting plates correspondingly mounted on the top surfaces of the two main longitudinal beams, and four leveling adjustment feet correspondingly mounted on the bottom surfaces of both ends of the two main crossbeams.
[0022] The above-mentioned test bench for CT machine bearings, wherein two side reinforcing ribs and one middle reinforcing rib are respectively fixed between the inner side surfaces of the two support plates of the bracket and the top surface of the base; two side reinforcing ribs are respectively fixed between the outer side surfaces of the two support plates and the top surface of the base.
[0023] In the above-mentioned test bench for CT machine bearings, a plurality of weight-reducing holes are provided on the bearing mounting plate in the bearing mounting mechanism.
[0024] The above-mentioned test bench for CT machine bearings, wherein a front reinforcement plate is respectively connected between the upper and lower parts of the inner side surfaces of the two rotating shaft mounting plates in the bearing mounting mechanism and the front surface of the bearing mounting plate; and a back reinforcement plate is respectively fixed between the rear end surfaces of the two rotating shaft mounting plates and the back surface of the bearing mounting plate.
[0025] The test bench for CT machine bearings of the utility model has the following characteristics:
[0026] 1. It can accurately simulate the operating conditions of CT machine bearings. Through the bearing installation mechanism and bearing testing mechanism, it can test CT machine bearings under different conditions, provide more accurate and stable loading for bearing testing, and meet the reliability test requirements of CT machine bearings.
[0027] 2. It can facilitate the disassembly and assembly of CT machine bearings, effectively reduce the operating burden of test personnel, and speed up the efficiency of batch testing. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 This is a front view of a test bench for CT machine bearings according to the present invention;
[0029] Figure 2 This is a side view of the test bench for CT machine bearings of the present utility model;
[0030] Figure 3 This is a three-dimensional diagram of a bearing mounting plate in a test bench for CT machine bearings of the present invention;
[0031] Figure 4 This is a front view of a bearing mounting mechanism in a test bench for CT machine bearings according to the present invention;
[0032] Figure 5 It is a side view of the bearing installation mechanism in the test bench for CT machine bearings of the present invention (with the CT machine bearing, counterweight base plate and counterweight plate installed). DETAILED DESCRIPTION
[0033] The present invention will be further described below with reference to the accompanying drawings.
[0034] See also Figure 1 The utility model is a test bench for CT machine bearings, comprising a bracket, a bearing installation mechanism, a bearing testing mechanism and an electric control box 4.
[0035] The bracket includes a base 1A and two support plates 1B symmetrically and vertically fixed on the top surfaces of the two ends of the base, wherein the base 1A includes two main beams 11, two main longitudinal beams 12 connected at the two ends of the two main beams 11, a number of longitudinal reinforcement ribs 13 spanning the middle parts of the two main beams 11, two plane mounting plates 14 mounted one-to-one on the top surfaces of the two main longitudinal beams 12 and four horizontal adjustment feet 10 mounted one-to-one on the bottom surfaces of the two ends of the two main beams 11; the upper part of the two support plates 1B respectively opens a coaxial axial hole; two side reinforcement ribs 15 and a middle reinforcement rib 16 are respectively fixed between the inner side surfaces of the two support plates 1B and the top surface of the plane mounting plate 14 of the base 1A; two side reinforcement ribs 15 are respectively fixed between the outer side surfaces of the two support plates 1B and the top surface of the plane mounting plate 14 of the base 1A.
[0036] The bearing mounting mechanism includes a circular bearing mounting plate 20, two rotating shaft mounting plates 21, a driving end shaft 22A, a driven end shaft 22B and two bearing seats 23; wherein, a motor through-hole is provided in the center of the bearing mounting plate 20, and a plurality of weight-reducing holes 202 are provided on the bearing mounting plate 20 on the periphery of the motor through-hole 201; a plurality of connecting holes 203 corresponding to the plurality of mounting holes on the outer ring end face of the CT machine bearing 5 are provided on the edge surface of the bearing mounting plate 20, so that the CT machine bearing 5 is mounted on the front face of the bearing mounting plate 20; the two rotating shaft mounting plates 21 are vertically connected to the outer end face of the bearing mounting plate 20 in a center-symmetrical manner, and the upper and lower parts of the inner side faces of the two rotating shaft mounting plates 21 are in contact with the shaft. A front reinforcing plate 211 is connected between the front faces of the bearing mounting plates 20, and a back reinforcing plate 212 is fixed between the rear end faces of the two rotating shaft mounting plates 21 and the back faces of the bearing mounting plates 20; the driving end shaft 22A is mounted on the outer end face of one rotating shaft mounting plate 21; the driven end shaft 22B is coaxially mounted on the outer end face of the other rotating shaft mounting plate 21 with the driving end shaft 22A; the driving end shaft 22A and the driven end shaft 22B are inserted into the axial holes of the two support plates 1B of the bracket one by one, and the two bearing seats 23 are mounted on the outer sides of the two support plates 1B one by one, so that the driving end shaft 22A and the driven end shaft 22B are supported by the two bearing seats 23 one by one.
[0037] The bearing test mechanism includes a bearing drive motor 30, a counterweight base plate 31, several counterweight plates 32 and a mounting plate drive motor 33; wherein,
[0038] A reducer 31 is installed on the rotating shaft of the bearing drive motor 30, and the reducer 31 is installed at the back center of the bearing mounting plate 20;
[0039] The counterweight base plate 32 is disc-shaped. A plurality of connection holes are formed along a circumference of the surface near the edge of the counterweight base plate 32, corresponding one-to-one to the plurality of mounting holes on the inner ring end face of the CT machine bearing 5. The first counterweight base plate 32 is mounted on the front face of the inner ring of the CT machine bearing 5. The first counterweight base plate 32 is connected to the reducer 31 via a spline shaft 321 and a spline shaft sleeve 322. The spline shaft 321 is connected to the reducer 31. The spline shaft sleeve 322 is fixed to the front face of the first counterweight base plate 32 and is sleeved onto the spline shaft 321.
[0040] The counterweight plates 33 are also disc-shaped. A plurality of connection holes are evenly distributed along a circle on the surface near the edge of each counterweight plate 33 , corresponding one-to-one to the plurality of connection holes on the counterweight base plate 32 , so that the plurality of counterweight plates 33 can be sequentially mounted on the front surface of the counterweight base plate 32 .
[0041] The mounting plate drive motor 34 is mounted on the input end of the rotary reducer 35 through the mounting seat 340. The rotary reducer 35 is mounted on the outer surface of a support plate 1B through the mounting plate 350, and the output end of the rotary reducer 35 is connected to the outer end of the drive end shaft 22A of the bearing mounting mechanism; the rotary reducer 35 adopts a worm gear rotary support plate.
[0042] The electrical control box 4 is mounted on the lower portion of the outer side of the other support plate 1B via four fixing columns 41. A touch screen 40 is mounted on the top surface of the electrical control box 4 via a touch screen bracket 42. The electrical control box 4 is electrically connected to the bearing drive motor 30, the mounting plate drive motor 33, and the touch screen 40. Both the bearing drive motor 30 and the mounting plate drive motor 33 are servo motors.
[0043] The test bench for CT machine bearings of the present invention is used to test the CT machine bearing 5 according to the following steps:
[0044] Step 1: First operate the touch screen 40 to control the installation plate drive motor 33 to rotate through the electric control box 4, and drive the bearing installation plate 20 to rotate to a horizontal state.
[0045] Step 2: Fix the outer ring of the CT machine bearing 5 to the front of the bearing mounting plate 20 by means of bolts;
[0046] Step 3: First, install the counterweight base plate 32 on the front surface of the inner ring of the CT machine bearing 5 with bolts, and then increase the number of counterweight plates 33 installed on the counterweight base plate 32 according to the test requirements;
[0047] Step 4: Operate the touch screen 40 to control the mounting plate drive motor 33 through the electrical control box 4 to rotate the bearing mounting plate 20 to a vertical position or a position at ±30° relative to the vertical direction to simulate various working conditions of the CT machine;
[0048] Step 5: Operate the touch screen 40 to control the bearing drive motor 30 to rotate through the electrical control box 4, and transmit torque to the counterweight base plate 32 through the spline shaft 321 and the spline shaft sleeve 322, so that the inner ring of the CT machine bearing 5 rotates together with the counterweight base plate 32 and the plurality of counterweight plates 33; when the inner ring of the CT machine bearing 5 rotates together with the counterweight base plate 32 and the plurality of counterweight plates 32, observe whether the CT machine bearing 5 has obvious noise, and whether the test bench of the CT machine bearing of the present invention has obvious vibration.
[0049] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by the claims.
Claims
1. A test bench for CT machine bearings, comprising a bracket, a bearing mounting mechanism, a bearing testing mechanism, and an electrical control box; characterized in that: The bracket includes a base and two support plates symmetrically and vertically fixed on the top surfaces of the two ends of the base, and the upper part of the two support plates is respectively provided with a coaxial shaft hole; The bearing mounting mechanism includes a circular bearing mounting plate, two rotating shaft mounting plates symmetrically connected to the outer end surfaces of the bearing mounting plate, a driving end shaft mounted on the outer end surface of one rotating shaft mounting plate, and a driven end shaft mounted on the outer end surface of the other rotating shaft mounting plate and coaxial with the driving end shaft; a motor through-hole is defined in the center of the bearing mounting plate, and a plurality of connecting holes are defined on the edge surface of the bearing mounting plate, which correspond one-to-one to the plurality of mounting holes on the outer ring end surface of the CT machine bearing, so that the CT machine bearing is mounted on the front surface of the bearing mounting plate; the driving end shaft and the driven end shaft are each inserted into the axial holes of the two support plates of the bracket through a bearing seat, one-to-one; The bearing testing mechanism includes a bearing drive motor, a counterweight base plate, a plurality of counterweight plates and a mounting plate drive motor; The bearing drive motor is installed at the back center of the bearing mounting plate, and the rotating shaft of the bearing drive motor is inserted into the motor through-hole of the bearing mounting plate; The counterweight base plate is mounted on the front side of the inner ring of the CT machine bearing, and the counterweight base plate is mounted on the rotating shaft of the bearing drive motor through a spline shaft and a spline sleeve; A plurality of counterweight plates are sequentially mounted on the front side of the counterweight base plate; The mounting plate driving motor is mounted on the outer end of the driving end shaft through a rotary reducer and is fixed to the outer side surface of a support plate; The electric control box is installed at the lower part of the outer side surface of another support plate, and a touch screen is installed on the top surface of the electric control box through a touch screen bracket. The electric control box is electrically connected to the bearing drive motor, the mounting plate drive motor and the touch screen respectively.
2. The test bench for CT machine bearings according to claim 1, characterized in that: The base of the bracket includes two main cross beams, two main longitudinal beams connected at both ends of the two main cross beams, a number of longitudinal reinforcement ribs spanning the middle parts of the two main cross beams, two flat mounting plates mounted one-to-one on the top surfaces of the two main longitudinal beams, and four leveling adjustment feet mounted one-to-one on the bottom surfaces of both ends of the two main cross beams.
3. The test bench for CT machine bearings according to claim 1, characterized in that: Two side reinforcing ribs and one middle reinforcing rib are respectively fixed between the inner side surfaces of the two support plates of the bracket and the top surface of the base; two side reinforcing ribs are respectively fixed between the outer side surfaces of the two support plates and the top surface of the base.
4. The test bench for CT machine bearings according to claim 1, characterized in that: A plurality of weight-reducing holes are provided on the bearing mounting plate in the bearing mounting mechanism.
5. The test bench for CT machine bearings according to claim 1, characterized in that: A front reinforcing plate is respectively connected between the upper and lower parts of the inner side surfaces of the two rotating shaft mounting plates in the bearing mounting mechanism and the front surface of the bearing mounting disk; a back reinforcing plate is respectively fixed between the rear end surfaces of the two rotating shaft mounting plates and the back surface of the bearing mounting disk.