阅读说明：本技术 离心机的运转扭矩测量装置 (Running torque measuring device of centrifugal machine ) 是由 李锁柱 李保文 傅宏亮 杨佩著 谷亚东 盛艳红 梁福兴 于 2021-01-26 设计创作，主要内容包括：一种离心机的运转扭矩测量装置,该装置安装于离心机的机械保险系统部位,包括固定套、传感器、定位板、压板、缓冲套和连接杆；固定套安装在离心机输出端,定位板安装在所述固定套的下部,固定套安装在离心机机架上,所述传感器与扭矩数显表连接；传感器的固定端通过连接件安装于固定套上面；压板设置在两支撑杆的上部,缓冲套设置在压板下面的两支撑杆之间,连接杆穿过所述缓冲套,连接杆的自由端的下面与所述传感器的测量端触接。本发明具有结构简单、安装方便、测量准确、降低噪音等诸多优点,大大提高了离心机的入料控制精度,使离心机能够发挥最大的处理能力；该方案是经申请人长期实践而研究出来的,并经装机试验,效果显著。(The device is arranged at the mechanical safety system part of the centrifugal machine and comprises a fixed sleeve, a sensor, a positioning plate, a pressing plate, a buffer sleeve and a connecting rod; the fixed sleeve is arranged at the output end of the centrifuge, the positioning plate is arranged at the lower part of the fixed sleeve, the fixed sleeve is arranged on a frame of the centrifuge, and the sensor is connected with the torque digital display meter; the fixed end of the sensor is arranged on the fixed sleeve through a connecting piece; the pressure plate is arranged on the upper portions of the two support rods, the buffer sleeve is arranged between the two support rods below the pressure plate, the connecting rod penetrates through the buffer sleeve, and the lower portion of the free end of the connecting rod is in contact with the measuring end of the sensor. The invention has the advantages of simple structure, convenient installation, accurate measurement, noise reduction and the like, greatly improves the feeding control precision of the centrifuge and enables the centrifuge to exert the maximum processing capacity; the scheme is researched by the applicant after long-term practice, and the effect is obvious after the installation test.)

1. The device is arranged at the mechanical safety system part of the centrifugal machine and comprises a fixed sleeve, a sensor, a positioning plate, a pressing plate, a buffer sleeve and a connecting rod; the fixed sleeve is arranged at the output end of the centrifuge, the positioning plate is arranged at the lower part of the fixed sleeve, the fixed sleeve is arranged on a frame of the centrifuge, and the sensor is connected with the torque digital display meter;

the sensor is characterized in that the fixed end of the sensor is arranged on the fixed sleeve through a connecting piece; the pressure plate is arranged on the upper portions of the two support rods, the buffer sleeve is arranged between the two support rods below the pressure plate, the connecting rod penetrates through the buffer sleeve, and the lower portion of the free end of the connecting rod is in contact with the measuring end of the sensor.

2. The running torque measuring device of the centrifuge as claimed in claim 1, wherein the buffer sleeve is a downward-opening U-shaped flexible sleeve which is arranged between the pressure plate and the two support rods in a transition fit manner.

3. An operating torque measuring device of a centrifuge according to claim 1, wherein an inner groove is provided in the center of the bottom surface of the connecting rod in the axial direction thereof.

4. The running torque measuring device of the centrifuge as claimed in claim 3, wherein the measuring end of the sensor is a point contact end, and the shape structure of the measuring end corresponds to the groove bottom structure of the inner groove.

5. The running torque measuring device of the centrifuge as claimed in claim 4, wherein the measuring end of the sensor is inserted into the inner groove of the connecting height, and the measuring end and the connecting height are in sliding fit.

6. The running torque measuring device of the centrifuge as claimed in claim 4, wherein the inner groove and the measuring end of the sensor are of a mutually matched arc structure.

7. The running torque measuring device of the centrifuge as claimed in claim 1, wherein the upper end of the support rod is provided with a movably sleeved adjusting nut to realize the up-and-down position adjustment of the pressure plate.

8. The running torque measuring device of a centrifuge according to claim 1, wherein a bottom surface of the cushion collar is flush with a bottom surface of the connecting rod.

9. The running torque measuring device of the centrifuge of claim 1, wherein said harness is rigidly connected to a frame of said centrifuge.

10. The running torque measuring device of the centrifuge as claimed in claim 1, wherein the bottom surface of the fixed end of the sensor is attached to the upper surface of the fixing sleeve and fixed by the connecting member; the detection end of the sensor is suspended above the positioning plate.

Technical Field

The invention relates to a measuring device, in particular to an operation torque measuring device of a centrifugal machine. The device is installed at the mechanical safety system part of the centrifuge, and the conversion of the torque of the centrifuge is realized by measuring the operating pressure of the centrifuge.

Background

The centrifugal machine is dewatering and desliming recovery equipment commonly used in the coal dressing and mineral dressing industries, in order to ensure that the centrifugal machine can exert the maximum processing capacity without overload, the load condition of the centrifugal machine needs to be monitored accurately in real time, then the feeding amount of the centrifugal machine is controlled according to monitoring data, the output torque of the centrifugal machine needs to be known when the load condition is monitored, and the conventional torque measurement mode is to realize the conversion of the torque of the centrifugal machine by measuring the running pressure of the centrifugal machine.

The sensor measuring end in the traditional torque measuring device adopts surface contact type fixing, namely, the measuring surface of the measuring end is fixedly contacted with the surface of a rod or a shaft to be measured, a certain pretightening force is applied during fixing, so that the measuring precision is greatly influenced, and the measured value can also have large fluctuation along with the vibration of a centrifugal machine, so that the accurate control precision cannot be realized by controlling the feeding quantity according to the measuring data. In order to ensure the long-term stable operation of the centrifuge, the traditional method in the past is to artificially reduce the feeding amount of the centrifuge so as to enable the centrifuge to operate under the condition of lower load, but the cost is that the centrifuge cannot exert the maximum processing capacity easily.

Disclosure of Invention

The invention provides a device for measuring the running pressure of a centrifugal machine, aiming at overcoming the defects and shortcomings of the prior art and mainly aiming at converting the torque of the centrifugal machine by measuring the running pressure of the centrifugal machine.

The technical scheme adopted by the invention for solving the technical problems is as follows: the device is arranged at the mechanical safety system part of the centrifugal machine and comprises a fixed sleeve, a sensor, a positioning plate, a pressing plate, a buffer sleeve and a connecting rod; the fixed sleeve is arranged at the output end of the centrifuge, the positioning plate is arranged at the lower part of the fixed sleeve, the fixed sleeve is arranged on a frame of the centrifuge, and the sensor is connected with the torque digital display meter;

the fixed end of the sensor is arranged on the fixed sleeve through a connecting piece; the pressure plate is arranged on the upper portions of the two support rods, the buffer sleeve is arranged between the two support rods below the pressure plate, the connecting rod penetrates through the buffer sleeve, and the lower portion of the free end of the connecting rod is in contact with the measuring end of the sensor.

The buffer sleeve is a U-shaped flexible sleeve with a downward opening, and is arranged between the pressing plate and the two supporting rods in a transition fit mode.

An inner groove is formed in the center of the bottom surface of the connecting rod along the axial direction of the connecting rod.

The measuring end of the sensor is a point contact end, and the shape structure of the measuring end corresponds to the groove bottom structure of the inner groove.

And the measuring end of the sensor is embedded in the inner groove with the high connection, and the measuring end and the inner groove are in sliding fit.

The inner groove and the measuring end of the sensor are of arc surface structures matched with each other.

The upper end of the supporting rod is provided with an adjusting nut movably sleeved, so that the upper and lower positions of the pressing plate can be adjusted.

The bottom surface of the buffer sleeve is flush with the bottom surface of the connecting rod.

The fixed sleeve is rigidly connected with the frame of the centrifuge.

The bottom surface of the fixed end of the sensor is attached to the upper surface of the fixed sleeve and is fixed through the connecting piece; the detection end of the sensor is suspended above the positioning plate.

Adopt above-mentioned technical scheme, compare with prior art: the fixing mode of the sensor probe is point contact and is not subjected to pretightening force, so that the measurement precision is high; the buffer sleeve with the U-shaped structure is matched with the flexible material, so that the influence of the vibration of equipment on the measurement precision can be fully absorbed, the anti-interference capability is strong, and the vibration noise can be reduced; the connecting rod adopts groove structure and sensor probe contact, can guarantee the connecting rod along its endwise slip's degree of freedom, extension sensor life.

The invention has the advantages of simple structure, convenient installation, accurate measurement, noise reduction and the like, greatly improves the feeding control precision of the centrifuge and enables the centrifuge to exert the maximum processing capacity; the scheme is researched by the applicant after long-term practice, and the effect is obvious after the installation test.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the mounting structure of the present invention.

FIG. 3 is a schematic view of the connecting rod and the measuring end of the present invention.

In the figure: the device comprises a fixed sleeve 1, a sensor 2, a support rod 3, a pressure plate 4, a buffer sleeve 5, a connecting rod 6, a positioning plate 7, a centrifuge frame 8 and a centrifuge differential mechanism 9.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. The conditions in the embodiments may be further adjusted according to specific conditions.

Referring to the attached drawings 1-3, the device for measuring the operating pressure of the centrifugal machine is arranged on a mechanical safety system part of the centrifugal machine and mainly comprises a fixed sleeve 1, a sensor 2, a supporting rod 3, a pressing plate 4, a buffer sleeve 5, a connecting rod 6 and a positioning plate 7. The fixed sleeve is arranged on the frame of the centrifuge, and the positioning plate is arranged at the lower part of the fixed sleeve. The sensor is connected with a torque digital display meter, and the sensor displays torque after converting a measured pressure signal through the digital display meter. The fixed end of the sensor is arranged on the fixed sleeve through a connecting piece such as a bolt; the pressure plate is arranged on the upper parts of the two support rods, the buffer sleeve is arranged between the two support rods below the pressure plate, the connecting rod penetrates through the buffer sleeve, and the lower surface of the free end of the connecting rod is in contact with the measuring end of the sensor.

As a preferred embodiment, the buffer sleeve is a U-shaped flexible sleeve with a downward opening, namely made of a U-shaped structure and flexible materials, and the buffer sleeve is arranged between the pressure plate and the two support rods in a transition fit mode.

An inner groove is arranged at the center of the bottom surface of the connecting rod along the axial direction of the connecting rod. The measuring end of the sensor is a point contact end, and the shape structure of the measuring end corresponds to the groove bottom structure of the inner groove. And the measuring end of the sensor is embedded in the inner groove with high connection, and the measuring end and the inner groove are in sliding fit.

In this embodiment, the measuring ends of inner grove and sensor are the cambered surface structure of mutual matching, and the connecting rod is the rectangular rod body. In actual design and production, the inner groove and the measuring end can also be designed into other shapes which are convenient for embedding or production, such as a dovetail shape, a ball shape and the like.

As another preferred embodiment, the upper end of the supporting rod is provided with an adjusting nut movably sleeved, so that the vertical position of the pressing plate is adjusted, and the connecting rods with different structures and specifications are matched. The bottom surface of the buffer sleeve is flush with the bottom surface of the connecting rod. The fixed end of the sensor is arranged on a fixed sleeve, and the fixed sleeve is rigidly connected with a frame of the centrifugal machine; the connecting rod is positioned by the positioning plate, the buffer sleeve and the pressing plate, and the inner groove in the bottom surface of the connecting rod is embedded with the measuring end of the sensor. The connecting rod is connected to a differential (torque output system) of the centrifuge via a shear pin.

The fixed sleeve is rigidly connected with the frame of the centrifuge. The bottom surface of the fixed end of the sensor is attached to the upper surface of the fixed sleeve and is fixed through the connecting piece; the detection end of the sensor is suspended above the positioning plate.

In order to further illustrate the accuracy of the torque estimation performed by the pressure measured by the pressure measuring device disclosed in the present invention, the following description is made with reference to actual test data.

The test is illustrated below:

during the test, a LWZ1600x2400B type centrifuge is selected as a test prototype, an electronic hanging scale is used as a measuring weight, a static loading mode is adopted to carry out a multi-group loading-measuring test, 19 groups of measuring data of the centrifuge adopting the invention and 19 groups of measuring data of the centrifuge not adopting the invention are recorded in the test, and then evaluation is carried out according to the test data (the test data are shown in the attached table below):

the data in the table show: the mean value of the error rates measured by the LWZ1600x2400B type centrifuge using the present invention was only 0.20%, while the mean value of the error rates measured by the LWZ1600x2400B type centrifuge using the present invention was 15.10%, and the error rates were reduced to 0.013 times, which is enough to show that the pressure values measured by the pressure measuring device for operating the centrifuge disclosed by the present invention are very significant in improving the accuracy of the measurement of the torque of the centrifuge.

Model LWZ1600x2400B centrifuge

Test data recording table for measuring torque by adopting centrifuge torque measuring device and without adopting the invention