WO2020037705A1 - 一种轴心跳动轨迹测试装置 - Google Patents
一种轴心跳动轨迹测试装置 Download PDFInfo
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- WO2020037705A1 WO2020037705A1 PCT/CN2018/103395 CN2018103395W WO2020037705A1 WO 2020037705 A1 WO2020037705 A1 WO 2020037705A1 CN 2018103395 W CN2018103395 W CN 2018103395W WO 2020037705 A1 WO2020037705 A1 WO 2020037705A1
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- magnetic
- shaft
- trajectory
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D41/00—Combines, i.e. harvesters or mowers combined with threshing devices
- A01D41/12—Details of combines
- A01D41/127—Control or measuring arrangements specially adapted for combines
Definitions
- the invention belongs to the technical field of assembly and balance detection of threshing rollers of a combine harvester, and in particular relates to a device for testing the axial beat trajectory of a threshing roller of a combine harvester.
- the patent CN201410788755.2 has invented an experimental method for measuring the axial trajectory of an eddy current sensor device. Two eddy current sensors installed perpendicular to each other are installed at the shaft end. The sensor signal is transmitted to the computer for real-time monitoring, which can effectively suppress some interference signals during online and offline detection of the pipeline, and has high sensitivity for the detection of defects on the inner and outer walls of the metal pipeline; the patent CN201410625285.8 invented a numerically controlled machine tool On-line measurement method of the spindle axis trajectory under cutting conditions.
- Patent CN201420290226.5 invented an axis trajectory detection sensor system, which uses a circuit system and uses a single chip microcomputer and an LDC1000 sensor acquisition chip, which is stable, reliable, and easy to expand. Most existing axial center beating trajectory test systems or methods use a displacement sensor or an eddy current sensor to collect the vibration signals at the shaft end, and then transmit the signals to a computer for processing and analysis using software.
- the above invention patent can test the beating trajectory of the threshing drum axis of the combine harvester.
- the complicated indirect lines between the sensor and the collector due to mutual entanglement, and the shaft end is prone to friction and damage to the sensor.
- the existing circuit using a computer to process subsequent amplified signals is complicated, and technicians who are proficient in software operation are responsible for manipulation and other issues, so the universality of the detection system is reduced.
- the invention is simple in structure, low in cost, and easy to be operated by experimenters, and is a testing device for beating the axis of a threshing drum of a combine harvester that is convenient for installation and application for the existing threshing drum structure of a rotating shaft.
- An object of the present invention is to provide a device for testing the eccentricity of a mandrel in response to the above problems, which is composed of a magnetic housing, a magnetic pen, a coordinate card fixing piece, a coordinate card, a shaft end adsorption mechanism and a card reader.
- the entire system is adsorbed on the shaft end of the threshing drum.
- the magnetic suspension pen inside is suspended and fixed by the magnetic repulsion force between the magnetic shell part, and the other parts rotate along with the shaft.
- the pen leaves on the coordinate card up and down with the actual axis beat Upside-down, left-right mirrored trajectory line. Then insert the coordinate card into the card reader to get the enlarged upright axis trajectory.
- the invention is applicable to the measurement of the axial beat trajectory of various rotating shafts.
- it not only solves the problem that the existing device easily rubs and collides with the threshing drum shaft, resulting in device damage
- the structure is simple, the price is low, and it is easy to install and disassemble. It can effectively test the threshing axis of the threshing drum.
- the technical solution of the present invention is: a device for testing the eccentricity of the axial center, which comprises a coaxially mounted magnetic housing, a magnetic pen, a coordinate card and a shaft end adsorption mechanism;
- One end of the magnetic housing is connected with one end of the shaft end adsorption mechanism; one side of the coordinate card is installed at one end of the shaft end adsorption mechanism; the other end of the shaft end adsorption mechanism is used for connection with one end of the shaft to be measured;
- the magnetic suspension pen is suspended and fixed inside the magnetic casing, and the pen tip at one end of the magnetic suspension pen is in contact with the other side of the coordinate card.
- the magnetic housing includes a first end cover, a first magnetic sheet, and a magnetic case
- One end of the magnetic housing is connected to one end of the shaft end adsorption mechanism, the first end cover is installed on the other end of the magnetic housing, the first magnetic sheet is installed on the first end cover, and the other is The magnetic phase at one end repels.
- the magnetic case is a magnetic ring-shaped cylinder
- the first magnetic piece is a circular magnet
- the first end cover is a circular table
- the step surface of the first end cover is provided with the magnetic case.
- One end is connected to the first groove
- the small circle of the first end cover is provided with a second groove for mounting the first magnetic sheet.
- the magnetic suspension brush includes a second magnetic sheet, a second end cap, a magnetic suspension, a third end cap, and a brush;
- the third end cap is installed at one end of the magnetic suspension, and the second end cap is installed at the other end of the magnetic suspension;
- the brush is mounted on one end of the third end cap; the second magnetic sheet is mounted on the second end cap.
- the magnetic suspension is a magnetic circular cylinder
- the second magnetic sheet is a circular magnet
- the second end cap is provided with a groove for mounting the second magnetic sheet
- the third end cap is provided with a brush for mounting.
- the shaft-end adsorption mechanism includes a magnetic adsorber, an adsorber amplification loop, and a connector;
- One end of the connector is connected to one end of the magnetic shell, and the other end of the connector is sleeved on one end of the magnetic adsorber; the adsorber amplification loop is sleeved on the other end of the magnetic adsorber, and the adsorber amplification loop and magnetic The end faces of the adsorber are flush.
- the magnetic adsorber is a cylindrical magnet
- the adsorber amplification ring is a ring magnet
- the connector is a circular table-shaped rotating body
- the connector is provided with a fourth groove for mounting the magnetic adsorber.
- the other side of the coordinate card is provided with a magnetic coordinate card fixing piece
- the coordinate card fixing piece is connected to the shaft-end adsorption mechanism by magnetic attraction to fix the coordinate card.
- the coordinate card fixing piece is a circular piece, and the pen of the magnetic suspension pen passes through the inner circle of the coordinate card fixing piece and abuts against the other side of the coordinate card.
- the above solution also includes a card reader
- the card reader includes a first convex lens, a second convex lens, and a lens barrel; the first convex lens and the second convex lens are respectively installed at two inner ends of the lens barrel;
- the focal length of the first convex lens is f 1
- the focal length of the second convex lens is f 2
- the distance between the first convex lens and the coordinate card is less than f 1
- the length of the lens barrel is greater than 2f 1 .
- the present invention designs a testing device for the shaft beat of the threshing roller of a combine harvester.
- the device comprises a magnetic shell, a magnetic suspension pen, a coordinate card fixing piece, a coordinate card, Shaft end suction mechanism and card reader.
- the whole device is directly attached to the testing shaft end of the threshing roller to monitor the pulsation of the shaft center.
- the magnetic suspension pen relies on the external magnetic repulsion to suspend and stand.
- the invention is convenient to use, avoids tedious follow-up processing, and solves the problem of monitoring the pulsation trajectory of the axis of the threshing drum.
- the adsorber amplification loop of the present invention has a variety of different models. Depending on the diameter of the shaft end to be measured, different types of adsorber amplification loops can be selected to be placed outside the magnetic adsorber, so that the diameter of the shaft end adsorption mechanism is different from the diameter of the shaft end adsorption mechanism.
- the diameter of the measuring shaft is the same.
- the structure of the invention is simple, there is no need to fix multiple sensors on the shaft end and perform data receiving and processing on the computer, avoiding the problem of indirect winding of the sensors, and directly absorbing the device to the shaft end to be tested can complete the shaft alignment.
- Heartbeat trajectory detection easy installation and removal; after the measurement is completed, the coordinate card can be removed and inserted into the card reader to observe the enlarged axis beat trajectory, which makes up for the complex defect of using a computer to process subsequent amplified signal processing circuits. .
- the entire system of the present invention is directly adsorbed on the outer side of the shaft end of the threshing drum shaft in the axial direction, instead of arranging several sensors along the shaft end circumferentially like a traditional testing device.
- the present invention has lower raw material prices for manufacturing each component of the test system, and has a simple manufacturing process, fewer procedures, and easier product quality assurance. It increases labor costs and energy prices. Can effectively reduce production input.
- FIG. 1 is an assembly diagram of a testing device for a shaft beat of a threshing drum of a combine harvester.
- Fig. 2 is a side sectional view of a magnetic housing assembly.
- FIG 3 is a side sectional view of a magnetic suspension brush assembly.
- FIG. 4 is a front view of a coordinate card fixing piece.
- Fig. 5 is a front view of a coordinate card.
- FIG. 6 is a schematic diagram of a structure of a shaft-end adsorption mechanism and installation of a coordinate card.
- Figure 7 is a schematic diagram of the structure of a card reader.
- FIG. 8 is a schematic diagram of a magnetic pole distribution of a magnetic case and a magnetic pen.
- the axial beat trajectory test device of the present invention can be used for the test of the beating trajectory of various rotating shafts.
- the following uses the axial beat trajectory test device for testing the axial beat trajectory of the threshing drum of the Taihu Star TH988 combine harvester as an example.
- the drawings further illustrate the present invention in detail, but the protection scope of the present invention is not limited thereto.
- the axial center trajectory test device includes a coaxially mounted magnetic casing 1, a magnetic suspension pen 2, a coordinate card fixing piece 3, a coordinate card 4, and a shaft end adsorption mechanism 5.
- One end of the magnetic housing 1 is connected to one end of a shaft end suction mechanism 5, and the other end of the shaft end suction mechanism 5 is attached to one end of the shaft 7 to be measured by magnetic force; one side of the coordinate card 4 is installed at the shaft end.
- the coordinate card fixing piece 3 is affixed to the other side of the coordinate card 4, and is connected to the shaft end adsorption mechanism 5 by magnetic attraction, and fixes the coordinate card 4;
- the magnetic suspension pen 2 is suspended in the magnetic casing 1 Inside, and the tip of one end of the magnetic suspension pen 2 is against the other side of the coordinate card 4, the other end of the magnetic suspension pen 2 is fixed by the magnetic repulsion force with the magnetic case 1; when the axis 7 to be measured starts to rotate, except for the internal suspension
- the magnetic suspension pen 2, the magnetic casing 1, the coordinate card fixing piece 3, the coordinate card 4 and the shaft end adsorption mechanism 5 rotate together with the shaft 7 to be measured.
- the device for measuring the eccentricity of the beating axis is directly attached to the end of the threshing roller to be measured, and the monitoring of the eccentricity of the eccentricity can be completed. Except for the magnetic suspension pen 2, other components rotate together with the measurement shaft 7 of the threshing cylinder. 2 rely on magnetic repulsion to suspend static.
- the invention is convenient to use, avoids tedious follow-up processing, and solves the problem of monitoring the pulsation trajectory of the axis of the threshing drum.
- the device for testing the beating trajectory of the axial center is directly adsorbed on the outer side of the axial end of the shaft 7 of the threshing drum in the axial direction, instead of arranging several sensors in the circumferential direction of the axial end like a conventional testing device.
- the magnetic housing 1 includes a first end cover 101, a first magnetic sheet 102, and a magnetic housing 103.
- One end of the magnetic housing 103 is connected to one end of a shaft end adsorption mechanism 5.
- One end cover 101 is fixed to the other end of the magnetic case 103 by means of an interference connection, and the first magnetic sheet 102 is embedded in the center of the first end cover 101.
- the magnetic case 103 is a magnetic ring-shaped cylinder
- the first end cover 101 is a circular table
- a stepped surface of the first end cover 101 is provided with a first recess connected to the other end of the magnetic case 103.
- the small circle of the first end cover 101 is provided with a second groove for mounting the first magnetic sheet 102.
- the magnetic case 103 has an inner diameter of 40 mm, an outer diameter of 45 to 47 mm, and a length of 90 to 100 mm.
- the length of the first end cover 101 is 10-12 mm.
- the other end of the magnetic case 103 can be inserted into the groove of the large circle of the first end cover 101 and fixed in an interference connection manner.
- the small circle of the first end cover 101 is small.
- the diameter is 40mm; the first magnetic piece 102 is a circular magnet with a thickness of 3 to 5mm and a diameter of 20mm.
- the end face of the first magnetic piece 102 is flush with the end face of the first end cover 101 and is embedded inside the first end cover 101. .
- the magnetic suspension pen 2 includes a second magnetic sheet 201, a second end cap 202, a magnetic suspension body 203, a third end cap 204, and a brush 205; the third end cap 204 is installed on the magnetic suspension One end of the body 203 and the second end cover 202 are installed on the other end of the magnetic suspension body 203 and are fixedly connected to the magnetic suspension body 203 by an interference connection.
- the third end cap 204 is provided with a columnar hole for assembling the brush 205, one end of the brush 205 is inserted into the columnar hole and connected to the third end cap 204; the second magnetic sheet 201 is embedded in the center of the second end cap 202;
- the magnetic suspension 203 is a magnetic ring-shaped cylinder with an inner diameter of 18 mm, an outer diameter of 24 mm, and a length of 30 to 35 mm.
- the second magnetic sheet 201 is a circular magnet, and the second end cover 202 is provided with a second magnetic
- the third groove of the sheet 201, the second end cap 202 has a length of 5 mm and a diameter of 18 mm; the second magnetic sheet 201 is a circular magnet with a thickness of 2 mm and a diameter of 9 mm.
- the end face is flush with the second end cap 202.
- the third end cap 204 is the same size as the second end cap 202, but has a cylindrical hole with a diameter of 3mm in the front; the pen 205 is inserted into the front cylindrical hole of the third end cap 204 with a length of 47-52mm , The diameter is 3mm.
- the coordinate card fixing piece 3 is a ring piece with an outer diameter of 40 mm, an inner diameter of 35 to 37 mm, a thickness of 1 to 2 mm, and is made of a magnet.
- the coordinate card fixing piece 3 and the shaft end can be used.
- the magnetic attraction between the suction mechanisms 5 fixes the coordinate card 4 to the axial end of the rear end of the connector 503.
- the coordinate card 4 is a circular piece of paper with good light transmission and a diameter of 40 mm; the coordinate card 4 is preferably a grid coordinate card, and a coordinate system and a grid-like grid are printed on the front surface.
- the grid lines are parallel to the x and y axes in the coordinate system, the grid line spacing is 1mm, and the grid lines are thicker every 5mm.
- the shaft-end adsorption mechanism 5 includes a magnetic adsorber 501, an adsorber amplification ring 502, and a connector 503.
- One end of the connector 503 is connected to one end of the magnetic housing 1.
- One end is sleeved on one end of the magnetic adsorber 501; the adsorber amplification loop 502 is sleeved outside the other end of the magnetic adsorber 501, and the adsorber amplification loop 502 is flush with the end surface of the magnetic adsorber 501;
- the end surface of one end is in contact with the amplifying ring 502 of the adsorber, and the shaft-end adsorption mechanism 5 is tightly connected to the magnetic casing 1.
- the other end of the magnetic adsorber 501 is adsorbed on the end of the shaft 7 to be measured by strong magnetic force.
- the adsorber amplification ring 502 can have a variety of different models. Depending on the diameter of the end surface of the shaft 7 to be measured, different types of adsorber amplification ring 502 can be selected and placed on the outside of the magnetic adsorber 501, so that the shaft end adsorption mechanism 5
- the diameter of the shaft is the same as the diameter of the shaft 7 to be tested.
- the magnetic adsorber 501 is a cylindrical magnet with a diameter of 15 to 20 mm and a length of 15 to 20 mm.
- the amplifying ring 502 of the adsorber is a ring magnet. There are many different models with a length of 5 to 10 mm.
- the maximum outer diameter can reach 45 to 47mm; when the diameter of the 7 ends of the shaft to be measured is larger than the diameter of the magnetic adsorber 501, a suitable type of adsorber expansion ring 502 is placed outside the magnetic adsorber 501, so that the diameter of the shaft end adsorption mechanism 5 and The shaft to be tested is the same in 7 segments;
- the connector 503 is a steel circular table-shaped rotating body with a length of 35 to 40 mm and is composed of two equal-length cylinders;
- the diameter of the connecting segment between the connector 503 and the magnetic adsorber 501 is 45 to 47mm, the front end has a circular fourth groove with a diameter of 15-20mm and a depth of 10mm, which is used for the insertion of the magnetic adsorber 501 and is tightly connected by magnetic attraction;
- the diameter of the connecting section with the magnetic case 103 is 40mm and the magnetic case is inserted The body 103 is tightly connected by magnetic attraction.
- the device further includes a card reader 6;
- the card reader 6 includes a first convex lens 601, a second convex lens 602, and a lens barrel 603; the first convex lens 601 and the second convex lens 602 are respectively mounted on The inner ends of the lens barrel 603.
- the throbbing drum axis trajectory has been drawn on the coordinate card 4
- the coordinate card fixing piece 3 and the coordinate card 4 are removed from the connector 503, and adsorbed on the lens barrel 603 near the first
- One end of a convex lens 601 can be viewed from one end of the second convex lens 602 by the threshing drum axis trajectory enlarged by the card reader 6.
- the focal length of the first convex lens 601 is f 1
- the focal length of the second convex lens 602 is f 2
- the distance between the first convex lens 601 and the coordinate card 4 is less than f 1
- the material of the lens barrel 603 is steel, the outer diameter is 40 mm, and the inner diameter is It is 36 to 38 mm, and the length of the lens barrel 603 is greater than 2f 1 .
- the structure of the invention is simple, there is no need to fix a plurality of sensors on the shaft end of the shaft 7 to be tested and receive and process data on a computer, avoiding the problem of indirect wires of the sensors being entangled with each other, and directly adsorbing the device to the shaft of the shaft 7 to be measured
- the end can complete the detection of the axial beat trajectory, which is convenient to install and disassemble.
- the coordinate card 4 can be removed and inserted into the card reader 6 to observe the enlarged axial beat trajectory, which compensates for the use of computer processing. Subsequent amplification of the signal processing circuit is complicated.
- the N pole of the magnetic case 103 is outside and the S pole is inside; the S pole of the magnetic suspension 203 is outside and the N pole is inside; the S pole of the second magnetic sheet 201 faces the first magnetic sheet 102 The S pole of the first magnetic sheet 102 faces the second magnetic sheet 201.
- the repulsive force between the magnetic poles creates a uniform gap between the magnetic case 1 and the magnetic suspension pen 2.
- the magnetic suspension pen 2 relies on the magnetic repulsion to suspend and stand still. When the axis 7 to be measured is rotated, the magnetic pen 2 is fixed.
- the first end cover 101, the second end cover 202, and the third end cover 204 are all made of plastic, and an interference fit is formed between other components by utilizing the good plasticity of the plastic, so that the components will not occur between them. Relative sliding.
- the specific implementation process of this type of combine harvester threshing drum axis beat trajectory test device is: using the coordinate card fixing piece 3 to adsorb the coordinate card 4 on the end face of the connector 503; inserting the shaft end adsorption mechanism 5 into the magnetic casing 1 Using the strong magnetic attraction of the magnetic adsorber 501, the entire test device is attached to the end of the shaft 7 to be measured.
- a suitable adsorber amplification ring 502 is selected to be placed outside the magnetic adsorber 501, so that The diameter of the suction end face of the shaft end suction mechanism 5 is the same as the shaft 7 to be tested; when the threshing drum is turned on, the magnetic suspension pen 2 inside the testing device is suspended and positioned by the magnetic repulsive force between the magnetic shell 1 and the other parts rotate with the threshing drum shaft. , The brush 205 writes down on the coordinate card 4 the trajectory line that is upside down and mirrored to the left and right, and finally inserts the coordinate card 4 into the card reader 6 to obtain an enlarged upright axis trajectory.
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Abstract
Description
Claims (10)
- 一种轴心跳动轨迹测试装置,其特征在于,包括同轴安装的磁性外壳(1)、磁悬画笔(2)、坐标卡(4)和轴端吸附机构(5);所述磁性外壳(1)的一端与轴端吸附机构(5)的一端连接;所述坐标卡(4)的一面安装在轴端吸附机构(5)的一端,所述轴端吸附机构(5)的另一端用于与待测轴(7)的一端连接;所述磁悬画笔(2)悬浮固定于磁性外壳(1)内部,且磁悬画笔(2)一端的笔尖与坐标卡(4)的另一面相抵。
- 根据权利要求1所述的轴心跳动轨迹测试装置,其特征在于,所述磁性外壳(1)包括第一端盖(101)、第一磁片(102)和磁性壳体(103);所述磁性壳体(103)的一端与轴端吸附机构(5)的一端连接,所述第一端盖(101)安装在磁性壳体(103)的另一端,所述第一磁片(102)安装在第一端盖(101)上、且与磁悬画笔(2)的另一端的磁性相排斥。
- 根据权利要求2所述的轴心跳动轨迹测试装置,其特征在于,所述磁性壳体(103)为磁性圆环状柱体,第一磁片(102)为圆形磁铁,所述第一端盖(101)为圆台状,第一端盖(101)的台阶面设有与磁性壳体(103)另一端连接的第一凹槽,第一端盖(101)的小圆设有安装第一磁片(102)的第二凹槽。
- 根据权利要求1所述的轴心跳动轨迹测试装置,其特征在于,所述磁悬画笔(2)包括第二磁片(201)、第二端盖(202)、磁性悬浮体(203)、第三端盖(204)和画笔(205);所述第三端盖(204)安装在磁性悬浮体(203)的一端,第二端盖(202)安装在磁性悬浮体(203)的另一端;所述画笔(205)安装在第三端盖(204)的一端;所述第二磁片(201)安装在第二端盖(202)上。
- 根据权利要求4所述的轴心跳动轨迹测试装置,其特征在于,所述磁性悬浮体(203)为磁性圆环状柱体,第二磁片(201)为圆形磁铁,第二端盖(202)设有安装第二磁片(201)的第三凹槽,第三端盖(204)设有安装画笔(205)的柱状孔。
- 根据权利要求1所述的轴心跳动轨迹测试装置,其特征在于,所述轴端吸附机构(5)包括磁性吸附器(501)、吸附器扩增环(502)和连接器(503);所述连接器(503)的一端与磁性外壳(1)的一端连接,连接器(503)的另一端套于磁性吸附器(501)的一端;所述吸附器扩增环(502)套在磁性吸附器(501)的另一 端,且吸附器扩增环(502)与磁性吸附器(501)的端面齐平。
- 根据权利要求6所述的轴心跳动轨迹测试装置,其特征在于,所述磁性吸附器(501)为圆柱形磁铁,所述吸附器扩增环(502)为环状磁铁,所述连接器(503)为圆台状回转体,所述连接器(503)设有安装磁性吸附器(501)的第四凹槽。
- 根据权利要求1所述的轴心跳动轨迹测试装置,其特征在于,所述坐标卡(4)的另一面设有带磁性的坐标卡固定片(3);所述坐标卡固定片(3)利用磁性吸力与轴端吸附机构(5)连接,将坐标卡(4)固定。
- 根据权利要求8所述的轴心跳动轨迹测试装置,其特征在于,所述坐标卡固定片(3)为圆环片,磁悬画笔(2)的画笔穿过坐标卡固定片(3)的内圈抵在坐标卡(4)的另一面。
- 根据权利要求1所述的轴心跳动轨迹测试装置,其特征在于,还包括读卡器(6);所述读卡器(6)包括第一凸透镜(601)、第二凸透镜(602)和镜筒(603);所述第一凸透镜(601)与第二凸透镜(602)分别安装在镜筒(603)的内部两端;所述第一凸透镜(601)焦距为f 1,第二凸透镜(602)焦距为f 2;第一凸透镜(601)与坐标卡(4)之间的距离小于f 1,所述镜筒(603)长度大于2f 1。
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GB1913500.3A GB2579267B (en) | 2018-08-23 | 2018-08-31 | Axial Pulsation Trajectory Test Device |
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CN201810966499.X | 2018-08-23 | ||
CN201810966499.XA CN109287255B (zh) | 2018-08-23 | 2018-08-23 | 一种轴心跳动轨迹测试装置 |
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CN110307974B (zh) * | 2019-08-19 | 2021-02-05 | 朱福栋 | 一种计算机散热电机主轴的检测设备 |
CN111226612B (zh) * | 2020-02-28 | 2021-07-20 | 江苏大学 | 一种电磁驱动悬浮闭式脱粒装置和收获机 |
CN116094239B (zh) * | 2023-04-07 | 2023-06-20 | 德瑞精工(深圳)有限公司 | 低跳动的细长型电机的加工方法 |
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