Crane speed reducer operation monitoring device and method based on high temperature and high humidity environment

Abstract

The application discloses a crane speed reducer operation monitoring device and method based on high-temperature and high-humidity environment and relates to the technical field of cranes.The application comprises a speed reducer body, the input shaft and the output shaft of the speed reducer body are located on the left side, an input shaft sleeve is mounted on the outer side of the input extension shaft, an output shaft sleeve is mounted on the outer side of the output extension shaft, a spiral guide groove is formed in the outer side of the input shaft sleeve and the output shaft sleeve, the spiral pitch ratio of the two spiral guide grooves is the same as the speed reducer reduction ratio, and a hydraulic detection system is arranged on the right side of the speed reducer body.Through the design of the spiral guide groove and the transmission head, in the case that the speed reducer slightly slips, the hydraulic drive system gives the output detection hydraulic cylinder a hydraulic drive force, the output detection hydraulic cylinder provides a driving force for the output shaft, the rotating speed of the output shaft is corrected, and the effect that the speed reducer slips under the high-temperature and high-humidity environment and the crane can stably operate is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cranes, in particular to a crane reducer operation monitoring device and method based on high-temperature and high-humidity environments. BACKGROUND

[0002] In the application of modern cranes, the reducer serves as a key component for power transmission and plays an important role. Especially in some harsh working environments, such as high-temperature and high-humidity workplaces, the operating state of the reducer is crucial to the performance and safety of the entire crane. However, traditional reducer monitoring methods mostly rely on periodic manual inspection or simple temperature monitoring, which cannot accurately reflect the operating state of the reducer in real time, especially in complex and challenging high-temperature and high-humidity environments, where traditional monitoring methods have many limitations.

[0003] In a high-temperature environment, the lubricating oil inside the reducer is prone to deterioration due to excessive temperature, resulting in a decrease in oil viscosity or thinning, which leads to poor lubrication, increased friction, and even direct contact between metal parts, causing slipping. Meanwhile, high humidity environments can easily allow water to enter the reducer, and the mixture of water and lubricating oil can cause emulsification of the lubricating oil, severely affecting its original lubricating function and causing increased friction of the gears or bearings, resulting in slipping. Reducer slipping can cause serious damage to the crane. In the utility model patent (publication number: CN216377235U), a crane reducer with oil monitoring function is disclosed, which can monitor the real-time state of the gear box lubricating oil without replacing the original gear box equipment, and realize early fault warning of the reducer operation. The detection logic of this patent and existing technologies is to install various detection sensors in the reducer and simply detect various parameters of the reducer. In high-temperature and high-humidity environments, detection sensors are also susceptible to influence. Moreover, existing crane reducers cannot provide stable output in the event of slipping, which leads to inaccurate control of the position of heavy objects during movement or hoisting of the crane, affecting operation precision, especially in work scenarios with strict position requirements, which can cause unnecessary trouble and risks: SUMMARY

[0004] The present application aims to solve the above problems by providing a crane reducer operation monitoring device and method based on high-temperature and high-humidity environments.

[0005] To achieve the above-mentioned purposes, the present application specifically adopts the following technical solutions:

[0006] The crane speed reducer operation monitoring device based on high temperature and high humidity environment, including the reducer body, the input shaft and the output shaft of the reducer body are located on the left side, the right side of the reducer body is provided with input extension shaft and output extension shaft, the input extension shaft and the output extension shaft are fixedly connected with the input shaft and the output shaft respectively, the outside of the input extension shaft is provided with an input shaft sleeve, the outside of the output extension shaft is provided with an output shaft sleeve, the outside of the input shaft sleeve and the output shaft sleeve is provided with a spiral guide groove, and the spiral turns ratio of the two spiral guide grooves is the same as the speed reduction ratio of the reducer under the same length;

[0007] The right side of the reducer body is provided with a hydraulic detection system, which includes an input detection hydraulic cylinder, an output detection hydraulic cylinder and a hydraulic drive system installed on the right side of the reducer body, a piston rod and a detection piston plate are sealingly and slidably connected in the input detection hydraulic cylinder, a detection spring is arranged between the piston rod and the detection piston plate, a pressure sensor is fixedly installed on the side of the detection piston plate close to the piston rod, a transmission head is arranged on the piston rod and the telescopic end of the output detection hydraulic cylinder, the transmission head is clamped in the spiral guide groove, the input detection hydraulic cylinder and the output detection hydraulic cylinder are connected in communication, and the hydraulic drive system can control the extension and retraction of the output detection hydraulic cylinder.

[0008] Further, the spiral guide groove is composed of a positive spiral groove and a reverse spiral groove, and the spiral pitch of the positive spiral groove and the reverse spiral groove is the same.

[0009] Further, the two ends of the positive spiral groove and the reverse spiral groove are connected in communication through a communication guide groove, the transmission head is composed of a shaft and a spiral piece, two shafts are rotatably installed on the piston rod and the telescopic end of the output detection hydraulic cylinder respectively, the spiral piece can be inserted into the positive spiral groove and the reverse spiral groove, and the width of the spiral piece is greater than the intersection width of the positive spiral groove and the reverse spiral groove.

[0010] Further, the outside of the input extension shaft and the output extension shaft is provided with a guide protrusion, the inner wall of the input shaft sleeve and the output shaft sleeve is provided with a transmission groove, the guide protrusion is inserted into the transmission groove, the right end of the input extension shaft and the output extension shaft is provided with a mounting external thread, and a mounting nut is threadedly connected on the mounting external thread.

[0011] Further, the hydraulic drive system is connected in communication with the extension inlet and the retraction inlet of the output detection hydraulic cylinder through pipelines respectively, a three-way electromagnetic valve is arranged on the extension inlet pipeline, the two sides of the input detection hydraulic cylinder are provided with a communication oil port, the communication oil port close to the output detection hydraulic cylinder is connected in communication with the three-way electromagnetic valve, the other side of the communication oil port is provided with a recovery electromagnetic valve, and a recovery tank is arranged on the outside of the input detection hydraulic cylinder, and the recovery port of the recovery tank is connected in communication with the recovery electromagnetic valve.

[0012] Further, the recovery port of the recovery tank is higher than the input detection hydraulic cylinder.

[0013] Further, the right side of the decelerator body is provided with a side bottom plate, and the input detection hydraulic cylinder, the output detection hydraulic cylinder, the hydraulic drive system and the recovery tank are fixedly installed on the side bottom plate.

[0014] Further, the width of the spiral guide groove on the output shaft sleeve is greater than the width of the spiral guide groove on the input shaft sleeve.

[0015] Further, the input detection hydraulic cylinder and the output detection hydraulic cylinder have the same inner diameter.

[0016] The crane decelerator operation monitoring method based on a high-temperature and high-humidity environment comprises the following steps:

[0017] S1, the input shaft sleeve and the output shaft sleeve are respectively installed on the input extension shaft and the output extension shaft, the spiral guide groove and the transmission head are used to realize the extension of the input detection hydraulic cylinder and the retraction of the output detection hydraulic cylinder at the same time, when the slipping occurs, the rotation speed of the output shaft is reduced, the extension and retraction of the input detection hydraulic cylinder and the output detection hydraulic cylinder appear distance difference, and the internal hydraulic oil pressure of the input detection hydraulic cylinder is increased;

[0018] S2, the pressure sensor is used to monitor whether the internal hydraulic oil pressure of the input detection hydraulic cylinder exceeds a preset threshold value, and the monitoring data is integrated into an existing online monitoring system and transmitted to a remote monitoring center in real time;

[0019] S3, when the monitoring pressure does not exceed the preset threshold value, the hydraulic drive system controls the operation of the output detection hydraulic cylinder to realize temporary output correction and improve the safety of the crane operation;

[0020] S4, when the monitoring pressure exceeds the preset threshold value, the hydraulic drive system injects hydraulic oil into the output detection hydraulic cylinder to limit the extension and retraction of the output detection hydraulic cylinder, and at the same time, the crane motor is powered off to realize the locking of the output shaft and the input shaft, prevent the crane from stopping urgently, and prevent the lifting object from falling back.

[0021] The beneficial effects of the present application are as follows:

[0022] 1, the input shaft sleeve, the output shaft sleeve, the input detection hydraulic cylinder and the output detection hydraulic cylinder are used to convert the slipping of the decelerator into internal pressure detection of the input detection hydraulic cylinder, so that the slipping of the decelerator in a high-temperature and high-humidity environment can be accurately detected, the pressure sensor is built in the input detection hydraulic cylinder, the detection is realized in vitro, the influence of the external environment on the pressure sensor is reduced by using the sealing property of the hydraulic cylinder, and the detection accuracy is improved.

[0023] 2. The application can provide the driving force for the output detection hydraulic cylinder through the hydraulic driving system to give the output detection hydraulic cylinder the driving force for the output shaft to correct the rotation speed of the output shaft, so that the crane can run stably under the condition that the reducer slips in the high-temperature and high-humidity environment.

[0024] 3. The application can lock the output detection hydraulic cylinder through the hydraulic driving system, so that the output shaft can be locked under the action of the spiral guide groove and the transmission head, the situation that the material falls due to the loss of power of the output shaft caused by excessive slipping can be prevented, and the running safety of the crane is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic diagram of the three-dimensional structure of the application Figure One ;

[0026] Figure 2 is a schematic diagram of the three-dimensional structure of the application Figure Two ;

[0027] Figure 3 is an explosion diagram of the application

[0028] Figure 4 is a schematic diagram of the input shaft sleeve structure of the application

[0029] Figure 5 is a schematic diagram of the output shaft sleeve structure of the application

[0030] Figure 6 is a schematic diagram of the hydraulic detection system structure of the application

[0031] Figure 7 is a schematic diagram of the input detection hydraulic cylinder structure of the application

[0032] Figure 8 is a schematic diagram of the transmission head of the application

[0033] The drawings show that: 1, the reducer body; 2, the input shaft; 21, the input extension shaft; 3, the output shaft; 31, the output extension shaft; 32, the mounting external thread; 33, the mounting nut; 4, the input shaft sleeve; 5, the output shaft sleeve; 51, the right-hand helical groove; 52, the left-hand helical groove; 53, the communication guide groove; 54, the transmission groove; 6, the input detection hydraulic cylinder; 61, the piston rod; 62, the detection spring; 63, the detection piston plate; 64, the pressure sensor; 65, the recovery electromagnetic valve; 7, the output detection hydraulic cylinder; 8, the hydraulic driving system; 81, the three-way electromagnetic valve; 9, the recovery tank; 10, the transmission head; 11, the side bottom plate. DETAILED DESCRIPTION

[0034] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0035] As shown in the first embodiment, Figures 1-8 The crane reducer operation monitoring device based on a high-temperature and high-humidity environment includes a reducer body 1, an input shaft 2 and an output shaft 3 of the reducer body 1 are located on the left side, an input extension shaft 21 and an output extension shaft 31 are arranged on the right side of the reducer body 1, the input extension shaft 21 and the output extension shaft 31 are fixedly connected with the input shaft 2 and the output shaft 3 respectively, an input shaft sleeve 4 is installed on the outer side of the input extension shaft 21, an output shaft sleeve 5 is installed on the outer side of the output extension shaft 31, a spiral guide groove is formed on the outer side of the input shaft sleeve 4 and the output shaft sleeve 5, and the number of spiral turns of the two spiral guide grooves is the same as the reduction ratio of the reducer under the same length;

[0036] A hydraulic detection system is arranged on the right side of the reducer body 1, and the hydraulic detection system includes an input detection hydraulic cylinder 6, an output detection hydraulic cylinder 7 and a hydraulic drive system 8 installed on the right side of the reducer body 1, a piston rod 61 and a detection piston plate 63 are sealingly and slidably connected in the input detection hydraulic cylinder 6, a detection spring 62 is arranged between the piston rod 61 and the detection piston plate 63, a pressure sensor 64 is fixedly installed on the side of the detection piston plate 63 close to the piston rod 61, a transmission head 10 is arranged on the piston rod 61 and the telescopic end of the output detection hydraulic cylinder 7, the transmission head 10 is clamped in the spiral guide groove, the input detection hydraulic cylinder 6 and the output detection hydraulic cylinder 7 are connected in communication, and the hydraulic drive system 8 can control the telescopic movement of the output detection hydraulic cylinder 7.

[0037] Further, the width of the spiral guide groove on the output shaft sleeve 5 is greater than the width of the spiral guide groove on the input shaft sleeve 4, the transmission head 10 on the output shaft sleeve 5 bears greater transmission load, and the output detection hydraulic cylinder 7 can more stably drive the output shaft 3.

[0038] Further, the inner diameters of the input detection hydraulic cylinder 6 and the output detection hydraulic cylinder 7 are the same.

[0039] The present application adopts the design of detecting and inputting and outputting on both sides, and the two do not interfere with each other.

[0040] When the crane is running, the motor drives the input shaft 2 to rotate, the input shaft 2 drives the input shaft sleeve 4 to rotate through the input extension shaft 21, the input shaft sleeve 4 drives the transmission head 10 to reciprocate in the spiral guide groove, the transmission head 10 drives the piston rod 61 to extend and retract, at the same time, the input shaft 2 drives the output shaft 3 to rotate through the gear set in the reducer body 1, the output shaft 3 drives the output shaft sleeve 5 to rotate, the output shaft sleeve 5 drives the transmission head 10 to reciprocate in the spiral guide groove, and the transmission head 10 drives the output detection hydraulic cylinder 7 to extend and retract. It should be noted that the spiral turn ratio of the two spiral guide grooves on the input shaft sleeve 4 and the output shaft sleeve 5 is the same as the reduction ratio of the reducer, that is, when the rotation speed ratio of the input shaft 2 and the output shaft 3 is 10:1, the spiral interval ratio of the spiral guide groove on the input shaft sleeve 4 and the spiral guide groove on the output shaft sleeve 5 is 1:10. Under the same length of the input shaft sleeve 4 and the output shaft sleeve 5, the number of spiral turns on the input shaft sleeve 4 is 10 times the number of spiral turns on the output shaft sleeve 5. Therefore, when the input shaft 2 rotates 10 turns, the output shaft 3 rotates 1 turn, the transmission head 10 on the input shaft sleeve 4 runs 10 turns along the spiral guide groove and completes the complete spiral guide groove, the transmission head 10 on the output shaft sleeve 5 runs 1 turn along the spiral guide groove and completes the complete spiral guide groove. The lengths of the two spiral guide grooves are the same, so the extension and retraction distances of the piston rod 61 and the extension and retraction distances of the output detection hydraulic cylinder 7 are the same, so the input detection hydraulic cylinder 6 and the output detection hydraulic cylinder 7 can synchronously and reversely extend and retract. When the piston rod 61 extends, hydraulic oil enters the input detection hydraulic cylinder 6, and when the piston rod 61 retracts, hydraulic oil enters the output detection hydraulic cylinder 7. That is, when the rotation speed of the input shaft 2 and the output shaft 3 is stable, the input detection hydraulic cylinder 6 and the output detection hydraulic cylinder 7 extend and retract stably, and the internal hydraulic oil pressure remains stable.

[0041] When the reducer slips in a high temperature and high humidity environment, the rotation speed of the output shaft 3 is reduced, at this time, the extension and retraction distance of the output detection hydraulic cylinder 7 is smaller than that of the input detection hydraulic cylinder 6, when the piston rod 61 is retracted, the internal transmission hydraulic oil pressure increases because the extension and retraction of the output detection hydraulic cylinder 7 is slow, the detection piston plate 63 and the pressure sensor 64 are pressed towards the piston rod 61, the pressure sensor 64 triggers the monitoring pressure, when the detection pressure is not large, at this time, the crane can continue to run, the hydraulic drive system 8 is connected, the input detection hydraulic cylinder 6 is disconnected with the output detection hydraulic cylinder 7, the hydraulic drive system 8 is connected to the output detection hydraulic cylinder 7, the extension and retraction drive of the output detection hydraulic cylinder 7 is given, so that the extension and retraction speed of the output detection hydraulic cylinder 7 reaches the requirement, because the thread pitch of the spiral guide groove on the output shaft sleeve 5 is large, the large spiral pitch increases the "slope" of the thread, which makes the axial force acting on the spiral have a larger component in the horizontal direction, and is more easily converted into rotational force, so that the output detection hydraulic cylinder 7 can more effectively drive the output shaft sleeve 5 to rotate through the transmission head 10 when extending and retracting, so that it can reach the rated speed, and the crane can stably lift in a high temperature and high humidity environment.

[0042] When the detection pressure is too large, it means that the reducer has basically failed, at this time, the crane needs to stop running, and is not suitable for lifting work, at this time, the hydraulic drive system 8 can be used to inject hydraulic oil to the output detection hydraulic cylinder 7 unilaterally, so as to lock the output detection hydraulic cylinder 7, the output detection hydraulic cylinder 7 is locked through the transmission head 10 and the spiral guide groove, the internal hydraulic oil of the input detection hydraulic cylinder 6 cannot be discharged because the input detection hydraulic cylinder 6 is closed, the input detection hydraulic cylinder 6 is locked through the transmission head 10 and the spiral guide groove, so as to lock the input shaft 2, thereby improving the closing stability of the crane and preventing the lifting object from falling.

[0043] The pressure sensor 64 in the application is built in the input detection hydraulic cylinder 6, realizes ex vivo detection, and can reduce the influence of the external environment on the pressure sensor 64 by using the sealing property of the hydraulic cylinder itself, thereby improving the detection accuracy, and the application integrates detection, correction and protection, and can be better applied to high temperature and high humidity environments, and there is a certain gap between the pressure sensor 64 and the piston rod 61, which can eliminate the influence of high temperature on the hydraulic oil and prevent the pressure sensor 64 from being triggered by mistake.

[0044] In the above embodiment, the spiral guide groove is composed of a right-hand spiral groove 51 and a left-hand spiral groove 52, and the spiral pitches of the right-hand spiral groove 51 and the left-hand spiral groove 52 are the same.

[0045] Further, the two ends of the positive helical groove 51 and the negative helical groove 52 are connected through the communication guide groove 53, the transmission head 10 is composed of a rotating shaft and a helical blade, the two rotating shafts are respectively rotatably installed on the piston rod 61 and the telescopic end of the output detection hydraulic cylinder 7, the helical blade can be inserted into the positive helical groove 51 and the negative helical groove 52, and the width of the helical blade is greater than the intersection width of the positive helical groove 51 and the negative helical groove 52.

[0046] When the transmission head 10 enters the positive helical groove 51, the piston rod 61 extends out, when the transmission head 10 enters the negative helical groove 52, the piston rod 61 retracts, the transmission head 10 adopts a helical blade design, which can have a larger contact area with the positive helical groove 51 and the negative helical groove 52, the transmission is more stable, and when the transmission head 10 passes through the communication guide groove 53, the transmission head 10 changes direction, which can more stably enter the negative helical groove 52 from the positive helical groove 51, realizing the stable reciprocating movement of the transmission head 10, so that through the design of the helical guide groove and the transmission head 10 in this embodiment, the transmission can be more stable.

[0047] In the above embodiment, the outer side of the input extension shaft 21 and the output extension shaft 31 is provided with a guide protrusion, the inner wall of the input shaft sleeve 4 and the output shaft sleeve 5 is provided with a transmission groove 54, the guide protrusion is inserted into the transmission groove 54, the right end of the input extension shaft 21 and the output extension shaft 31 is provided with a mounting external thread 32, and the mounting external thread 32 is threadedly connected with a mounting nut 33.

[0048] During installation, the input shaft sleeve 4 and the output shaft sleeve 5 are respectively sleeved on the input extension shaft 21 and the output extension shaft 31, and then the mounting nut 33 is locked to complete the installation.

[0049] In the above embodiment, the hydraulic drive system 8 is connected in communication with the extension inlet and the retraction inlet of the output detection hydraulic cylinder 7 through pipelines, a three-way electromagnetic valve 81 is arranged on the extension inlet pipeline, the two sides of the input detection hydraulic cylinder 6 are provided with communication inlets, the communication inlet close to the output detection hydraulic cylinder 7 is connected in communication with the three-way electromagnetic valve 81, the other side communication inlet is provided with a recovery electromagnetic valve 65, and the outer side of the input detection hydraulic cylinder 6 is provided with a recovery tank 9, the recovery inlet of the recovery tank 9 is connected in communication with the recovery electromagnetic valve 65.

[0050] When the detection pressure is not large, and when the input detection hydraulic cylinder 6 is fully extended, the three-way electromagnetic valve 81 is switched, the input detection hydraulic cylinder 6 is disconnected from the output detection hydraulic cylinder 7, the hydraulic drive system 8 is connected in communication with the output detection hydraulic cylinder 7, the extension inlet and the retraction inlet are used to control the extension and retraction of the output detection hydraulic cylinder 7 to provide correction hydraulic drive, and at the same time, the recovery electromagnetic valve 65 is opened, the recovery tank 9 is connected in communication with the input detection hydraulic cylinder 6, and the input detection hydraulic cylinder 6 repeatedly presses and sucks the oil into and out of the recovery tank 9.

[0051] When the detected pressure is too large, and when the input detection hydraulic cylinder 6 is fully extended, the three-way electromagnetic valve 81 is switched, the recovery electromagnetic valve 65 is not opened, the output detection hydraulic cylinder 7 is locked at the same time as the input detection hydraulic cylinder 6, and protection is realized.

[0052] Example five, on the basis of the above examples, further comprising, the recovery port of the recovery tank 9 is higher than the input detection hydraulic cylinder 6, through the design, after the piston rod 61 is extended, the hydraulic oil can flow back to the input detection hydraulic cylinder 6.

[0053] Example six, on the basis of the above examples, further comprising, the right side of the reducer body 1 is provided with a side bottom plate 11, the input detection hydraulic cylinder 6, the output detection hydraulic cylinder 7, the hydraulic drive system 8 and the recovery tank 9 are all fixedly installed on the side bottom plate 11, through the setting of the side bottom plate 11, the device realizes integration, and installation is more convenient.

[0054] Example seven, based on the crane reducer operation monitoring method under high temperature and high humidity environment, comprising the following steps:

[0055] S1, the input shaft sleeve 4 and the output shaft sleeve 5 are respectively installed on the input extension shaft 21 and the output extension shaft 31, the input detection hydraulic cylinder 6 and the output detection hydraulic cylinder 7 are extended and retracted at the same time by using the spiral guide groove and the transmission head 10, when the slip occurs, the rotating speed of the output shaft 3 is reduced, the extension and retraction of the input detection hydraulic cylinder 6 and the output detection hydraulic cylinder 7 appears distance difference, the hydraulic oil pressure in the input detection hydraulic cylinder 6 increases;

[0056] S2, the pressure sensor 64 monitors whether the hydraulic oil pressure in the input detection hydraulic cylinder 6 exceeds the preset threshold value, the monitoring data is integrated into the existing online monitoring system, and is transmitted to the remote monitoring center in real time;

[0057] S3, when the monitoring pressure does not exceed the preset threshold value, the hydraulic drive system 8 controls the output detection hydraulic cylinder 7 to run to realize temporary output correction, and improves the safety of crane operation;

[0058] S4, when the monitoring pressure exceeds the preset threshold value, the hydraulic drive system 8 injects hydraulic oil into the output detection hydraulic cylinder 7, limits the extension and retraction of the output detection hydraulic cylinder 7, at the same time, the crane motor is powered off, the output shaft 3 and the input shaft 2 are locked, to prevent the crane from stopping urgently, and prevent the lifting object from falling back.

[0059] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the appended claims are intended to cover all such modifications that do not depart from the true spirit and scope of the application. Therefore, the application is not limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A crane reducer operation monitoring device based on high temperature and high humidity environment, comprising a reducer body (1), characterized in that, The input shaft (2) and output shaft (3) of the reducer body (1) are both located on the left side. The input extension shaft (21) and output extension shaft (31) are provided on the right side of the reducer body (1). The input extension shaft (21) and output extension shaft (31) are fixedly connected to the input shaft (2) and output shaft (3) respectively. An input shaft sleeve (4) is installed on the outside of the input extension shaft (21), and an output shaft sleeve (5) is installed on the outside of the output extension shaft (31). A spiral guide groove is opened on the outside of both the input shaft sleeve (4) and the output shaft sleeve (5). Under the same length, the ratio of the number of spiral turns of the two spiral guide grooves is the same as the reduction ratio of the reducer. A hydraulic detection system is provided on the right side of the reducer body (1). The hydraulic detection system includes an input detection hydraulic cylinder (6), an output detection hydraulic cylinder (7), and a hydraulic drive system (8) installed on the right side of the reducer body (1). The input detection hydraulic cylinder (6) has a piston rod (61) and a detection piston plate (63) connected in a sealed sliding manner inside. A detection spring (62) is provided between the piston rod (61) and the detection piston plate (63). A pressure sensor (64) is fixedly installed on the side of the detection piston plate (63) near the piston rod (61). The extension and retraction ends of the piston rod (61) and the output detection hydraulic cylinder (7) are both provided with a transmission head (10). The transmission head (10) is respectively engaged in the spiral guide groove of the input shaft sleeve (4) and the output shaft sleeve (5). The input detection hydraulic cylinder (6) and the output detection hydraulic cylinder (7) are connected. The hydraulic drive system (8) can control the extension and retraction of the output detection hydraulic cylinder (7). The hydraulic drive system (8) is connected to the extension oil inlet and retraction oil inlet of the output detection hydraulic cylinder (7) through pipelines respectively. A three-way solenoid valve (81) is provided on the extension oil inlet pipeline. Both sides of the input detection hydraulic cylinder (6) are provided with connecting oil ports. The connecting oil port near the output detection hydraulic cylinder (7) is connected to the three-way solenoid valve (81). The connecting oil port on the other side is provided with a recovery solenoid valve (65). A recovery tank (9) is provided on the outside of the input detection hydraulic cylinder (6). The recovery port of the recovery tank (9) is connected to the recovery solenoid valve (65). The crane reducer operation monitoring method includes the following steps: S1. Install the input sleeve (4) and the output sleeve (5) on the input extension shaft (21) and the output extension shaft (31) respectively. Use the spiral guide groove and the transmission head (10) to realize the simultaneous extension of the input detection hydraulic cylinder (6) and the retraction of the output detection hydraulic cylinder (7). When slippage occurs, the rotation speed of the output shaft (3) decreases, the extension and retraction of the input detection hydraulic cylinder (6) and the output detection hydraulic cylinder (7) have a distance difference, and the hydraulic oil pressure inside the input detection hydraulic cylinder (6) increases. S2. The pressure sensor (64) monitors whether the internal hydraulic oil pressure of the detection hydraulic cylinder (6) exceeds the preset threshold. The monitoring data is integrated into the existing online monitoring system and transmitted to the remote monitoring center in real time. S3. When the monitoring pressure does not exceed the preset threshold, the hydraulic drive system (8) controls the output of the detection hydraulic cylinder (7) to achieve temporary output correction and improve the safety of crane operation. S4. When the monitored pressure exceeds the preset threshold, the hydraulic drive system (8) injects hydraulic oil into the output detection hydraulic cylinder (7) to restrict the extension and retraction of the output detection hydraulic cylinder (7). At the same time, the crane motor is de-energized to lock the output shaft (3) and the input shaft (2) to prevent the crane from stopping in an emergency and to prevent the lifted object from falling back.

2. The crane reducer operation monitoring device based on high temperature and high humidity environment according to claim 1, characterized in that, The spiral guide groove is composed of a positive spiral groove (51) and a negative spiral groove (52), and the spiral spacing of the positive spiral groove (51) and the negative spiral groove (52) is the same.

3. The crane reducer operation monitoring device based on high temperature and high humidity environment according to claim 2, characterized in that, The two ends of the positive spiral groove (51) and the negative spiral groove (52) are connected by a connecting guide groove (53). The transmission head (10) consists of a rotating shaft and a spiral blade. The two rotating shafts are respectively rotatably installed on the piston rod (61) and the extension end of the output detection hydraulic cylinder (7). The spiral blade can be inserted into the positive spiral groove (51) and the negative spiral groove (52), and the width of the spiral blade is greater than the intersection width of the positive spiral groove (51) and the negative spiral groove (52).

4. The crane reducer operation monitoring device based on high temperature and high humidity environment according to claim 3, characterized in that, The input extension shaft (21) and the output extension shaft (31) are provided with guide protrusions on their outer sides. The inner walls of the input bushing (4) and the output bushing (5) are provided with transmission grooves (54). The guide protrusions are inserted into the transmission grooves (54). The right ends of the input extension shaft (21) and the output extension shaft (31) are provided with mounting external threads (32). Mounting nuts (33) are threaded onto the mounting external threads (32).

5. The crane reducer operation monitoring device based on high temperature and high humidity environment according to claim 4, characterized in that, The recovery port of the recovery tank (9) is higher than the input detection hydraulic cylinder (6).

6. The crane reducer operation monitoring device based on high temperature and high humidity environment according to claim 5, characterized in that, The reducer body (1) has a side base plate (11) on its right side. The input detection hydraulic cylinder (6), the output detection hydraulic cylinder (7), the hydraulic drive system (8) and the recovery tank (9) are all fixedly installed on the side base plate (11).

7. The crane reducer operation monitoring device based on high temperature and high humidity environment according to claim 6, characterized in that, The width of the spiral guide groove on the output shaft sleeve (5) is greater than the width of the spiral guide groove on the input shaft sleeve (4).

8. The crane reducer operation monitoring device based on high temperature and high humidity environment according to claim 7, characterized in that, The inner diameter of the input detection hydraulic cylinder (6) is the same as that of the output detection hydraulic cylinder (7).

Images