Intelligent test device and method for cutting speed reducer of digging and anchoring all-in-one machine

Abstract

The invention provides an intelligent test device and method for a cutting speed reducer of a digging and anchoring all-in-one machine, and belongs to the technical field of speed reducer (acceleration) test. Comprising a cutting speed reducer driving motor used for providing power for a to-be-tested cutting speed reducer, universal transmission shafts used for being connected with output shafts on the two sides of the to-be-tested cutting speed reducer respectively, a torque sensor connected with the universal transmission shafts, an accompanying speed reducer connected with the torque sensor and a dynamometer connected with the accompanying speed reducer. According to the intelligent test device and method for the cutting speed reducer of the digging and anchoring all-in-one machine, a no-load test and a step-by-step loading test of the cutting speed reducer of the high-power digging and anchoring all-in-one machine are achieved, information such as temperature, vibration, torque and rotating speed of the cutting speed reducer is collected in real time, and the intelligent test device and method can be used for analyzing the assembly quality and reliability of the cutting speed reducer.

Description

Technical Field

[0001] The invention belongs to the technical field of reducer (accelerator) testing, and specifically discloses an intelligent testing device and method for a cutting reducer of an integrated digging and anchoring machine. Background Art

[0002] The integrated technology of coal tunnel excavation and anchoring is the development direction of rapid coal tunnel excavation and an important part of high-yield and high-efficiency mine technology. The integrated excavation and anchoring machine is a comprehensive equipment integrating excavation, support, transportation and crawler travel. It has high integration and advanced technology, making it the most advanced coal mine excavation machine in the world that best embodies the integrated excavation and anchoring technology.

[0003] The core mechanism of the integrated miner and anchor machine, the cutting reducer, innovatively adopts high-speed shunt reversing dual-drive cutting, that is, the high-power power source is vertically redirected by the first-stage spur gear transmission and the second-stage bevel gear transmission, and then the power output is realized through the third-stage planetary transmission and the fourth-stage planetary transmission. It has the characteristics of small size, high power and high efficiency. Because the cutting reducer is located at the front end of the integrated miner and anchor machine, the operating environment is harsh, and it is subjected to ultra-large torque, it often has oil leakage, high temperature, tooth breaking and other faults. In addition, because the cutting reducer is often located at the front end of the tunnel, it is very difficult to disassemble underground, so it has the characteristics of difficult after-sales service and high cost. Summary of the invention

[0004] Loading test on the reducer is one of the most effective means to check the assembly quality and reliability of the reducer. To this end, the present application provides an intelligent testing device and method for the cutting reducer of an integrated drilling and anchoring machine, so as to check the assembly quality and reliability of the cutting reducer before installation.

[0005] The intelligent testing device for the cutting reducer of the integrated drilling and anchoring machine provided by the present invention comprises a cutting reducer driving motor for providing power to the cutting reducer to be tested, a universal transmission shaft respectively connected to the output shafts on both sides of the cutting reducer to be tested, a torque sensor connected to the universal transmission shaft, a test reducer connected to the torque sensor, and a dynamometer connected to the test reducer.

[0006] In the above-mentioned intelligent test device for the cutting reducer of the integrated mining and anchoring machine, the cutting reducer drive motor is connected to the input shaft of the cutting reducer to be tested; the input end of the universal transmission shaft is connected to the output shaft of the cutting reducer to be tested through a connecting flange, and the output end is connected to the input end of the torque sensor through a bearing seat; the output end of the torque sensor is connected to the input shaft of the test reducer through coupling II; and the output shaft of the test reducer is connected to the input end of the dynamometer through coupling I.

[0007] In the above-mentioned intelligent test device for the cutting reducer of the integrated mining and anchoring machine, the torque sensor is a flange-type torque sensor; the transmission ratio of the test reducer is 16:1.

[0008] The above-mentioned intelligent test device for the cutting reducer of the integrated mining and anchoring machine also includes a frequency conversion controller I, a frequency conversion controller II, a host industrial control computer, an intelligent measurement and control system and a data acquisition module; the host industrial control computer is used to transmit the load information to the intelligent measurement and control system; the intelligent measurement and control system matches and calculates the load information and the parameters of the cutting reducer to be tested collected in real time by the data acquisition module, and transmits the calculation results to the frequency conversion controller I and the frequency conversion controller II, and the frequency conversion controller I and the frequency conversion controller II respectively control the speed, torque, current and voltage parameters of the two dynamometers, and at the same time, the two dynamometers transmit the speed, torque, current and voltage parameters to the intelligent measurement and control system.

[0009] In the above-mentioned intelligent test device for the cutting reducer of the integrated mining and anchoring machine, the rated voltage of the cutting reducer drive motor is 1140V; the dynamometer is an AC power dynamometer with a rated voltage of 380V; the intelligent test device for the cutting reducer of the integrated mining and anchoring machine also includes a power distribution control cabinet and a 1140V / 380V transformer; the factory voltage is 1140V, and the power is distributed through the power distribution control cabinet. The first route directly supplies power to the cutting reducer drive motor, and the second route is connected to the frequency converter I and the frequency converter II after passing through the 1140V / 380V transformer. The frequency converter I and the frequency converter II are respectively connected to the two dynamometers.

[0010] The above-mentioned intelligent test device for the cutting reducer of the integrated mining and anchoring machine also includes a chiller for cooling the cutting reducer drive motor and the test reducer.

[0011] The above-mentioned intelligent test device for the cutting reducer of the integrated mining and anchoring machine also includes a mouse and / or keyboard for inputting load information to the upper industrial computer; and

[0012] A display and / or printer used to display the output torque, temperature, and speed of the cutting reducer to be tested, the output torque, speed, voltage, and current of the dynamometer, and the water pressure and water flow of the chiller.

[0013] The above-mentioned intelligent test device for the cutting reducer of the integrated mining and anchoring machine also includes a test bench for fixing the cutting reducer to be tested, the bearing seat, the test reducer and the dynamometer, and a cast iron platform connected to the test bench.

[0014] The invention provides an intelligent test method for a cutting reducer of an integrated anchoring and digging machine, comprising the following steps:

[0015] S1, connecting the output shafts on both sides of the cutter reducer to be tested to the universal transmission shaft in the above-mentioned intelligent test device for the cutter reducer of the anchoring and mining machine;

[0016] S2, no-load operation: after the driving motor of the cutting reducer is started, the cutting reducer to be tested runs at the rated speed for a preset time, and after the cutting reducer intelligent test device for the anchoring and digging machine and the cutting reducer to be tested run normally, step S3 is performed;

[0017] S3, load operation: input the load speed and running time to the upper industrial computer according to the rated power of 0%, 20%, 40%, 60%, 80%, 100%, and 120%. The upper industrial computer transmits the load information to the intelligent measurement and control system. The intelligent measurement and control system matches and calculates the load information and the parameters of the cutting reducer to be tested collected in real time by the data acquisition module, and transmits the calculation results to the frequency conversion controller I and the frequency conversion controller II. The frequency conversion controller I and the frequency conversion controller II respectively control the speed, torque, current, and voltage parameters of the two dynamometers. At the same time, the two dynamometers transmit the speed, torque, current, and voltage parameters to the intelligent measurement and control system.

[0018] In the above-mentioned intelligent test method for the cutting reducer of the anchoring and digging machine, the input speed and torque of the cutting reducer to be tested are calculated by the following formula:

[0019] i = n1 / n2;

[0020] T1 = 9550P / n1;

[0021] T2=9550ηP / n2;

[0022] Where: i—transmission ratio of the cutting reducer to be tested, which is a fixed value;

[0023] n1—input speed of the cutting reducer to be tested, rpm;

[0024] n2—output speed of the cutting reducer to be tested, rpm;

[0025] T1—input torque of the cutting reducer to be tested, N·m;

[0026] P—rated power of the cutting reducer to be tested, kW;

[0027] T2—output torque of the cutting reducer to be tested, N·m;

[0028] η—Transmission efficiency of the cutting reducer to be tested.

[0029] Compared with the prior art, the present invention has the following beneficial effects.

[0030] The intelligent testing device and method for the cutter reducer of the integrated drilling and anchoring machine provided by the present invention realize the no-load test and step-by-step loading test of the cutter reducer of the high-power integrated drilling and anchoring machine, and collect the temperature, vibration, torque, speed and other information of the cutter reducer in real time, which can be used to analyze the assembly quality and reliability of the cutter reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a simplified structural diagram of the cutting reducer to be tested;

[0033] Figure 2 This is the working principle diagram of the intelligent test device for the cutting reducer of the anchor-digger integrated machine;

[0034] Figure 3 This is the control flow chart of the intelligent test device for the cutting reducer of the integrated drilling and anchoring machine.

[0035] In the figure: 1-cutting reducer to be tested; 1.1-first stage transmission of cutting reducer; 1.2-second stage transmission of cutting reducer; 1.3-third stage transmission of cutting reducer; 1.4-fourth stage transmission of cutting reducer; 1.5-intermediate shaft;

[0036] 2.1-Dynamometer; 2.2-Coupling I; 2.3-Test reducer; 2.4-Coupling II; 2.5-Torque sensor; 2.6-Bearing seat; 2.7-Universal drive shaft; 2.8-Connecting flange; 2.9-Intelligent measurement and control system; 2.10-Cutting reducer drive motor; 2.11-Power distribution control cabinet; 2.12-1140V / 380V transformer; 2.13-Frequency conversion controller I; 2.14-Frequency conversion controller II; 2.15-Chiller. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example 1

[0039] Figure 1 It is a simplified structural diagram of the cutting reducer 1 to be tested, including the first-stage transmission 1.1 of the cutting reducer, the second-stage transmission 1.2 of the cutting reducer, the third-stage transmission 1.3 of the cutting reducer, the fourth-stage transmission 1.4 of the cutting reducer, and an intermediate shaft 1.5.

[0040] The first-stage transmission 1.1 of the cutting reducer is a spur gear transmission, the second-stage transmission 1.2 of the cutting reducer is a bevel gear transmission, the third-stage transmission 1.3 of the cutting reducer is a planetary transmission, and the fourth-stage transmission 1.4 of the cutting reducer is a planetary transmission. The driving bevel gear of the second-stage bevel gear transmission 1.2 is meshed with the driven spur gear of the first-stage transmission 1.1 of the cutting reducer, and the driven bevel gear of the second-stage bevel gear transmission 1.2 is connected to the intermediate shaft 1.5 through bolts and stoppers. Internal splines are respectively provided at both ends of the intermediate shaft 1.5. The internal spline on the left side of the intermediate shaft 1.5 is connected to the external spline of the sun gear in the third-stage planetary transmission on the left side of the cutting reducer to realize power output to the left side; the internal spline on the right side of the intermediate shaft 1.5 is connected to the external spline of the sun gear in the third-stage planetary transmission on the right side of the cutting reducer to realize power output to the right side.

[0041] Figure 2 This is the working principle diagram of the intelligent test device for the cutting reducer of the anchoring and digging machine. The intelligent test device for the cutting reducer of the anchoring and digging machine includes a dynamometer 2.1, a coupling I 2.2, a test reducer 2.3, a coupling II 2.4, a torque sensor 2.5, a bearing seat 2.6, a universal transmission shaft 2.7, a connecting flange 2.8, an intelligent measurement and control system 2.9, a cutting reducer drive motor 2.10, a power distribution control cabinet 2.11, a 1140V / 380V transformer 2.12, a frequency conversion controller I 2.13, a frequency conversion controller II 2.14, a chiller 2.15, a host industrial computer, and a data acquisition module.

[0042] The cutting reducer driving motor 2.10 is located in the middle position of the cutting reducer 1 to be tested, and is connected to the input shaft of the cutting reducer 1 to be tested to provide power for the cutting reducer 1 to be tested; after the cutting reducer 1 to be tested reduces speed and increases torque, power is split and output from the left and right sides of the cutting reducer 1 to be tested respectively; the input end of the universal transmission shaft 2.7 is connected to the output shaft of the cutting reducer 1 to be tested through the connecting flange 2.8, and the output end is connected to the input end of the torque sensor 2.5 through the bearing seat 2.6; the output end of the torque sensor 2.5 is connected to the input shaft of the accompanying test reducer 2.3 through the coupling II 2.4; the output shaft of the accompanying test reducer 2.3 is connected to the input end of the dynamometer 2.1 through the coupling I 2.2.

[0043] After the cutting reducer 1 to be tested is powered by the cutting reducer drive motor 2.10, it passes through the four-stage transmission of the cutting reducer to achieve left-right synchronous power diversion.

[0044] Since the cutting reducer 1 to be tested realizes power splitting after the second-stage bevel gear transmission, if the load test is carried out on the left or right side of the cutting reducer 1 to be tested, only 50% of the load can be satisfied in the first-stage spur gear transmission and the second-stage bevel gear transmission of the cutting reducer 1 to be tested; if the load test is carried out on the left and right sides of the cutting reducer 1 to be tested at the same time, 100% of the load can be satisfied in the first-stage spur gear transmission and the second-stage bevel gear transmission of the cutting reducer 1 to be tested. By adopting the above-mentioned intelligent test device for the cutting reducer of the anchoring and digging machine, the load test on the output ends of both sides of the cutting reducer 1 to be tested can be innovatively and synchronously realized, and 100% load test can be realized on the first-stage spur gear transmission and the second-stage bevel gear transmission of the cutting reducer.

[0045] The rated voltage of the cutting reducer drive motor 2.10 is 1140V. In order to adapt to the voltage of the cutting reducer drive motor 2.10, the factory power supply voltage is 1140V.

[0046] Dynamometer 2.1 is an AC electric dynamometer with a rated voltage of 380V, which is composed of a three-phase AC commutator motor, a dynamometer and a tachometer generator; it can operate as an AC generator to provide a load for the cutting reducer 1 to be tested and measure the output torque of the cutting reducer 1 to be tested, and it can also operate as an AC motor to drive the cutting reducer 1 to be tested and measure the input torque of the cutting reducer 1 to be tested; the AC electric dynamometer also has an energy feedback function, which can feed back the energy generated by the cutting reducer 1 to be tested to the power grid in the form of electrical energy for use by other equipment, instead of converting the energy into heat energy for consumption.

[0047] In order to realize the energy feedback function, the electric dynamometer 2.1 is powered by the 1140V voltage of the factory building through the 1140V / 380V transformer 2.12; the 1140V power distribution of the factory building passes through the distribution control cabinet 2.11, the first route directly supplies power to the cutting reducer drive motor 2.10, and the second route passes through the 1140V / 380V transformer 2.12 and is connected to the frequency conversion controller I 2.13 and the frequency conversion controller II 2.14 respectively to supply power to the two dynamometers 2.1; the frequency conversion controller I 2.13 and the frequency conversion controller II 2.14 are the power control cabinets of the two electric dynamometers 2.1 respectively, to realize the start-up, speed regulation and energy-saving control of the load.

[0048] Torque sensor 2.5 is a flange-type large-range torque sensor with a short axial dimension, which matches the full-load output torque of the cutting reducer.

[0049] The transmission ratio of the test reducer 2.3 is 16:1, which plays a role in increasing speed and reducing torque on the load part, and is matched with the dynamometer 2.1 to realize the step-by-step loading of the cutting reducer from 0%, 20%, 40%, 60%, 80%, 100%, and 120%. The chiller 2.15 cools the cutting reducer drive motor 2.10 and the test reducer 2.3.

[0050] The above-mentioned cutting reducer intelligent test bench also includes a stand for fixing the cutting reducer 1 to be tested, the bearing seat 2.6, the accompanying test reducer 2.3 and the electric dynamometer 2.1, and a cast iron platform connected thereto.

[0051] Figure 3 This is a control flow chart of the intelligent test device for the cutting reducer of the anchor-mining machine. The mouse and / or keyboard input the load information to the upper industrial computer; the upper industrial computer transmits the load information to the intelligent measurement and control system 2.9; the intelligent measurement and control system 2.9 matches and calculates the load information and the parameters of the cutting reducer 1 to be tested collected in real time by the data acquisition module, and transmits the calculation results to the frequency conversion controller I 2.13 and the frequency conversion controller II 2.14, and the frequency conversion controller I 2.13 and the frequency conversion controller II 2.14 respectively control the speed, torque, current and voltage parameters of the two dynamometers 2.1, and at the same time, the two dynamometers 2.1 transmit the speed, torque, current and voltage parameters to the intelligent measurement and control system 2.9; the display and / or printer displays the output torque, temperature and speed of the cutting reducer 1 to be tested, displays the output torque, speed, voltage and current of the dynamometer 2.1, and displays the water pressure and water flow of the chiller 2.15.

[0052] Example 2

[0053] This embodiment provides an intelligent test method for a cutting reducer of an integrated miner and anchoring machine, comprising the following steps:

[0054] S1, connecting the output shafts on both sides of the cutter reducer 1 to be tested to the universal transmission shaft 2.7 in the above-mentioned intelligent test device for the cutter reducer of the anchoring and mining machine;

[0055] S2, no-load operation: after the cutting reducer drive motor 2.10 is started, the cutting reducer 1 to be tested is operated at the rated speed for a preset time, and the cutting reducer intelligent test device for the anchoring and digging machine and the cutting reducer to be tested are operating normally (after half an hour of operation, it is required that all connectors and fasteners are not loose, all seals and joints are not leaking or seeping oil, the operation is stable and without impact, and the bearing and oil pool temperatures are normal), then proceed to step S3;

[0056] S3, load operation: the load speed and operation time are input to the upper industrial computer by the mouse and / or keyboard according to the rated power of 0%, 20%, 40%, 60%, 80%, 100%, 120%, respectively. The upper industrial computer transmits the load information to the intelligent measurement and control system 2.9. The intelligent measurement and control system 2.9 matches and calculates the load information and the parameters of the cutting reducer 1 to be tested collected in real time by the data acquisition module, and transmits the calculation results to the frequency conversion controller I and 2.13 frequency conversion controller II 2.14. The frequency conversion controller I 2.13 and the frequency conversion controller II 2.14 respectively control the speed, torque, current and voltage parameters of the two dynamometers 2.1. At the same time, the two dynamometers 2.1 transmit the speed, torque, current and voltage parameters to the intelligent measurement and control system 2.9.

[0057] In order to save space in the intelligent test device for the cutting reducer of the anchor-mining machine, no torque sensor is provided between the cutting reducer drive motor 2.1 and the cutting reducer 1 to be tested. The input speed and torque of the cutting reducer 1 to be tested are calculated by the following formula:

[0058] i = n1 / n2;

[0059] T1 = 9550P / n1;

[0060] T2=9550ηP / n2;

[0061] Where: i—transmission ratio of the cutting reducer to be tested, which is a fixed value;

[0062] n1—input speed of the cutting reducer to be tested, rpm;

[0063] n2—output speed of the cutting reducer to be tested, rpm;

[0064] T1—input torque of the cutting reducer to be tested, N·m;

[0065] P—rated power of the cutting reducer to be tested, kW;

[0066] T2—output torque of the cutting reducer to be tested, N·m;

[0067] η—Transmission efficiency of the cutting reducer to be tested.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intelligent test device for cutting reducer of a drilling and anchoring machine, characterized in that: It includes a cutting reducer drive motor for providing power to the cutting reducer to be tested, a universal transmission shaft respectively connected to the output shafts on both sides of the cutting reducer to be tested, a torque sensor connected to the universal transmission shaft, a test reducer connected to the torque sensor, and a dynamometer connected to the test reducer.

2. The intelligent testing device for the cutting reducer of the anchoring and digging machine according to claim 1 is characterized in that: The cutting reducer drive motor is connected to the input shaft of the cutting reducer to be tested; The input end of the universal transmission shaft is connected to the output shaft of the cutting reducer to be tested through a connecting flange, and the output end is connected to the input end of the torque sensor through a bearing seat; The output end of the torque sensor is connected to the input shaft of the test reducer through a coupling II; The output shaft of the test reducer is connected to the input end of the dynamometer through a coupling I.

3. The intelligent testing device for the cutting reducer of the anchoring and digging machine according to claim 1 or 2, characterized in that: The torque sensor is a flange type torque sensor; The transmission ratio of the test reducer is 16:

1.

4. The intelligent testing device for the cutting reducer of the integrated digging and anchoring machine according to claim 1 is characterized in that: It also includes frequency conversion controller I, frequency conversion controller II, upper industrial computer, intelligent measurement and control system and data acquisition module; the upper industrial computer is used to transmit load information to the intelligent measurement and control system; The intelligent measurement and control system matches and calculates the load information and the parameters of the cutting reducer to be tested collected in real time by the data acquisition module, and transmits the calculation results to the frequency conversion controller I and the frequency conversion controller II. The frequency conversion controller I and the frequency conversion controller II respectively control the speed, torque, current and voltage parameters of the two dynamometers. At the same time, the two dynamometers transmit the speed, torque, current and voltage parameters to the intelligent measurement and control system.

5. The intelligent testing device for the cutting reducer of the integrated digging and anchoring machine according to claim 4 is characterized in that: The rated voltage of the cutting reducer drive motor is 1140V; The dynamometer is an AC electric dynamometer with a rated voltage of 380V; It also includes power distribution control cabinet and 1140V / 380V transformer; The factory voltage is 1140V, which is distributed through the power distribution control cabinet. The first route directly supplies power to the cutting reducer drive motor, and the second route is connected to the frequency conversion controller I and frequency conversion controller II after passing through the 1140V / 380V transformer. The frequency conversion controller I and frequency conversion controller II are connected to two dynamometers respectively.

6. The intelligent testing device for the cutting reducer of the anchoring and digging machine according to claim 4 or 5, characterized in that: It also includes a water chiller for cooling the cutting reducer drive motor and the accompanying test reducer.

7. The intelligent testing device for the cutting reducer of the anchoring and digging machine according to claim 6 is characterized in that: It also includes a mouse and / or keyboard for inputting load information to an upper-level industrial computer; and A display and / or printer for displaying the output torque, temperature and speed of the cutting reducer to be tested, the output torque, speed, voltage and current of the dynamometer, and the water pressure and water flow of the chiller.

8. The intelligent testing device for the cutting reducer of the anchoring and digging machine according to claim 7 is characterized in that: It also includes a bench for fixing the cutting reducer to be tested, a bearing seat, a test reducer and a dynamometer, and a cast iron platform connected to the bench.

9. An intelligent test method for the cutting reducer of a drilling and anchoring machine, characterized in that: The steps include: S1, connecting the output shafts on both sides of the cutter reducer to be tested to the universal transmission shaft in the intelligent test device for the cutter reducer of the anchoring and mining machine according to any one of claims 6 to 8; S2, no-load operation: after the driving motor of the cutting reducer is started, the cutting reducer to be tested runs at the rated speed for a preset time, and after the cutting reducer intelligent test device for the anchoring and digging machine and the cutting reducer to be tested run normally, step S3 is performed; S3, load operation: input the load speed and running time to the upper industrial computer according to the rated power of 0%, 20%, 40%, 60%, 80%, 100%, and 120%. The upper industrial computer transmits the load information to the intelligent measurement and control system. The intelligent measurement and control system matches and calculates the load information and the parameters of the cutting reducer to be tested collected in real time by the data acquisition module, and transmits the calculation results to the frequency conversion controller I and the frequency conversion controller II. The frequency conversion controller I and the frequency conversion controller II respectively control the speed, torque, current, and voltage parameters of the two dynamometers. At the same time, the two dynamometers transmit the speed, torque, current, and voltage parameters to the intelligent measurement and control system.

10. The intelligent testing method for the cutting reducer of the anchoring and digging machine according to claim 9 is characterized in that: The input speed and torque of the cutting reducer to be tested are calculated by the following formula: i = n1 / n2; T1 = 9550P / n1; T2=9550ηP / n2; Where: i—transmission ratio of the cutting reducer to be tested, which is a fixed value; n1—input speed of the cutting reducer to be tested, rpm; n2—output speed of the cutting reducer to be tested, rpm; T1—input torque of the cutting reducer to be tested, N·m; P—rated power of the cutting reducer to be tested, kW; T2—output torque of the cutting reducer to be tested, N·m; η—Transmission efficiency of the cutting reducer to be tested.

Images