CN210764085U - Transmission system for main lifting of casting crane - Google Patents
Transmission system for main lifting of casting crane Download PDFInfo
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- CN210764085U CN210764085U CN201921748279.6U CN201921748279U CN210764085U CN 210764085 U CN210764085 U CN 210764085U CN 201921748279 U CN201921748279 U CN 201921748279U CN 210764085 U CN210764085 U CN 210764085U
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- rotating speed
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Abstract
The utility model discloses a transmission system for the main lifting of a casting crane, which is a symmetrical mechanism and comprises a motor, a brake, a speed reducer, a winding drum, a fault monitoring system and a ratchet and pawl mechanism, wherein the motor, the brake, the speed reducer and the winding drum are sequentially connected in the power transmission order; the fault monitoring system comprises a controller, an alarm, a rotating speed sensor arranged between the motor and the brake, a current sensor arranged on a power supply cable of the motor and an adjustable sensor support, wherein the rotating speed sensor and the current sensor are electrically connected to the input end of the controller, and the alarm is electrically connected to the output end of the controller. The utility model provides a monitoring scheme to ratchet pawl mechanism theory of operation characteristic has perfected trouble early warning in the driving chain, and sensor support can avoid the sensor to receive the influence of temperature and the ageing of wire with adjustable, has improved the safety in production guarantee.
Description
Technical Field
The utility model relates to a transmission system, in particular to a transmission system that is used for the foundry crane to rise mainly.
Background
At present, in the industry of hoisting mechanism speed reducers of ladle cranes in China, a transmission system is required to have two motor inputs, the input rotating speeds of the two motors are combined into a rotating speed to be synchronously output so as to drive a rotary drum (a winding drum), and high-temperature molten liquid metal is hoisted through the rotary drum. It needs to monitor equipment, carries out dynamic adjustment to two rotational speeds of two motor inputs, monitors its synchronous condition, transmission system load rational distribution condition etc. this has decisive influence to going on and the output of production line that steel mill production technology can be safe and lasting. Therefore, in order to ensure that the transmission system does not generate additional internal stress additional load and ensure the service life and the safe operation of the lifting system, a mechanical speed regulating mechanism is required to be added to the transmission system, and the mechanical speed regulating mechanism is a ratchet wheel and pawl mechanism.
The existing transmission system is lack of an important transmission link for monitoring the mechanical speed regulating mechanism, so that the transmission system has potential safety hazards which are extremely unfavorable for safety production. Secondly, the temperature of the high-temperature molten liquid metal working environment is high, in addition, the running of a gear train in the equipment and the temperature of a shell of the friction equipment are high, the sensor is directly nested on the shell of the equipment, so that the detection precision of the sensor is seriously influenced, and leads of the sensor are disordered and hung on the shell of the high-temperature equipment, so that the sensor is easy to age and damage. Therefore, there is a need for improvement of the prior art to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a transmission system that is used for casting crane to rise mainly realizes particularly through following technical scheme:
the utility model discloses a transmission system for main hoisting of a casting crane, which is a symmetrical mechanism and comprises a motor, a brake, a speed reducer, a winding drum, a fault monitoring system and a ratchet and pawl mechanism, wherein the motor, the brake, the speed reducer and the winding drum are sequentially connected in a power transmission order; the fault monitoring system comprises a controller, an alarm, a rotating speed sensor arranged between a motor and a brake, a current sensor arranged on a power supply cable of the motor and an adjustable sensor support, wherein the rotating speed sensor and the current sensor are electrically connected to the input end of the controller; the ratchet wheel and pawl mechanism is arranged on a transmission shaft of the middle stage of an input shaft and an output shaft of the speed reducer and comprises a ratchet wheel assembly, a top column and a pawl, wherein the top column and the pawl are arranged on the ratchet wheel assembly, the top end of the top column is hemispherical, a semi-cylindrical groove is arranged at the contact position of the pawl and the top column at the lower end of the pawl, and the rotating radius of the semi-cylindrical groove is larger than that of the top column.
Further, the fault monitoring system further comprises a vibration sensor arranged at a shaft system of the ratchet and pawl mechanism, and the vibration sensor is electrically connected to the input end of the controller and used for monitoring and judging the frequency degree of pawl tooth jumping.
Furthermore, the middle part of the bevel support is provided with a circular through hole, and a closed type wire binding clip is detachably connected in the circular through hole.
Further, the rotation speed sensor is a non-contact rotation speed sensor, the non-contact rotation speed sensor is installed on the sensor clamping plate, and a signal line of the non-contact rotation speed sensor is clamped on the closed type wire clamp.
Further, the current sensor is a hall current sensor.
Furthermore, the alarm is an audible and visual alarm.
The utility model has the advantages that: the utility model provides a monitoring scheme to ratchet pawl mechanism theory of operation characteristic has perfected fault monitoring and early warning in the driving chain, has improved the safety in production guarantee. The adjustable sensor support can effectively avoid the sensor on the shell from being influenced by temperature and the aging of the lead. Other advantageous effects of the present invention will be further described with reference to the following embodiments.
Drawings
The invention will be further described with reference to the following figures and examples:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of an adjustable sensor holder;
FIG. 3 is a schematic view of a ratchet-pawl mechanism;
FIG. 4 is a schematic view of the pawl structure of the present invention;
FIG. 5 is a schematic block diagram of monitoring;
FIG. 6 is a functional block diagram of the speed sensor and current sensor monitoring;
FIG. 7 is a schematic block diagram of vibration sensor monitoring.
Detailed Description
As shown in the figure: the utility model discloses a transmission system for main hoisting of a casting crane, which is a symmetrical mechanism and comprises a motor, a brake, a speed reducer, a winding drum 10, a fault monitoring system and a ratchet and pawl mechanism, wherein the motor, the brake, the speed reducer and the winding drum 10 are sequentially connected in a power transmission order; the fault monitoring system comprises a controller, an alarm, a rotating speed sensor arranged between a motor and a brake, a current sensor arranged on a power supply cable of the motor and an adjustable sensor support 9, wherein the rotating speed sensor and the current sensor are electrically connected with the input end of the controller, the alarm is electrically connected with the output end of the controller, the adjustable sensor support 9 comprises a base 901, a right-angle support 902 horizontally and slidably connected to the base, a bevel support 903 vertically and slidably connected to the right-angle support 902, an adjusting plate 904 slidably connected with the bevel support 903 and a sensor clamping plate 905, a fastener 906 is arranged at the sliding connection position, and a clamping part 907 used for clamping a speed reducer is arranged at the lower end of the base; the ratchet wheel and pawl mechanism is arranged on a transmission shaft of a middle stage of an input shaft and an output shaft of the speed reducer and comprises a ratchet wheel assembly 701, a top column 702 and a pawl 703, wherein the top column 702 and the pawl 703 are arranged on the ratchet wheel assembly 701, the top end of the top column 702 is hemispherical, a semi-cylindrical groove 704 is arranged at the contact position of the pawl 703 and the top column 702 at the lower end of the pawl 703, and the rotating radius of the semi-cylindrical groove 704 is larger than that of the top column 702. Preferably, the current sensor is a hall current sensor, and the alarm is an audible and visual alarm. The controller is preferably an industrial computer.
Here, the semi-cylindrical groove 704 at the lower end of the pawl 703 is in hemispherical fit with the top end of the top pillar 702, and when the pawl 703 and the top pillar 702 move relatively, the sliding friction part between the pawl 703 and the top pillar 702 in the prior art is converted into rolling friction, so that the abrasion resistance of the top pillar 702 is enhanced, and the service life of the top pillar 702 is prolonged. Furthermore, in order to reduce the influence of high temperature of the equipment shell on the sensor, the sensor is supported at a detection point through the adjustable sensor support 9, so that the ventilation performance is good, the heat dissipation is fast, and the precision reduction caused by the influence of temperature on the sensor is effectively avoided. Secondly, the sensor can be adjusted in a three-dimensional space near a detection point through any elements of the base 901, the right-angle support 902, the bevel support 903, the adjusting plate 904 and the sensor clamping plate 905, and the sensor is convenient to use. Further, in order to avoid high-temperature aging or damage of the lead, a circular through hole is formed in the middle of the bevel support 903, and a closed type wire bundling clamp is detachably connected in the circular through hole. The rotation speed sensor is mounted on a sensor clamping plate 905, and a signal line of the rotation speed sensor is clamped on a closed type wire clamp. For example, the noncontact rotational speed sensor may be mounted as described above.
The utility model is of a symmetrical structure, wherein the left and right symmetry of the elements are arranged in pairs, and for the convenience of expression, the elements (A) and (B) are distinguished.
When the device works, the motor (A)1 and the motor (B)2 are respectively transmitted to the winding drum 10 through the brake (A)3, the brake (B)4, the speed reducer (A)5, the speed reducer (B)6, the ratchet-pawl mechanism (A)7 and the ratchet-pawl mechanism (B) 8.
For current sensor placement and detection purposes: when the motor (A)1 and the motor (B)2 are operated, the current sensor (A)11 and the current sensor (B)12 respectively monitor the motor (A)1 and the motor (B)2 in real time, and transmit signals to the controller through the data acquisition unit. The controller compares the current data of the current sensor (A)11 and the current sensor (B)12, when the difference exceeds an initial set value which is considered to be arranged in the controller, the controller gives a control signal to the alarm, when the alarm gives a prompt, a maintainer can judge that the difference of input current is large, the current difference is large, the loads of the two motors are uneven, the resistance of a transmission system is in fault, and the machine needs to be stopped and repaired if necessary. When the difference is within the allowable range, i.e. less than the initial set value manually entered in the controller, the monitoring is continued. Preferably, the current sensor is a hall current sensor, and the alarm is an audible and visual alarm.
For rotational speed sensor arrangement and detection purposes: the motor (A)1 and the motor (B)2 rotate and transmit power to the speed reducer (A)5 and the speed reducer (B)6 through the brake (A)3 and the brake (B)4 respectively. At the moment, the rotating speed sensor (A)13 and the rotating speed sensor (B)14 respectively monitor the input rotating speed at the input shaft of the speed reducer and transmit signals to the controller through the data acquisition unit. The controller compares the data of the rotating speed sensor (A)13 and the rotating speed sensor (B)14, when the difference exceeds an initial set value which is considered to be arranged in the controller, the controller gives a control signal to the alarm, and when the alarm gives a prompt, a maintainer can judge that the difference of the input rotating speeds is large, and the pawl 703 of one ratchet-pawl mechanism pops up and engages to possibly have a fault and needs to be overhauled. When the difference is within the allowable range, i.e. less than the initial set value manually entered in the controller, the monitoring is continued. Furthermore, the rotating speed sensor is a non-contact rotating speed sensor, and the alarm is an audible and visual alarm.
Preferably, the fault monitoring system further comprises a vibration sensor arranged at a shaft system of the ratchet and pawl mechanism, and the vibration sensor is electrically connected to an input end of the controller and used for monitoring and judging the tooth skipping frequency of the pawl 703. The monitoring working principle is the same as the working principle of the rotating speed sensor and the current sensor, and the description is omitted. When the set value is exceeded and the alarm is used for prompting, a maintainer can judge that the ratchet-pawl mechanism is possible to break down, and when the ratchet-pawl mechanism is in an allowable range, the maintenance person can continuously monitor and can monitor the tooth jumping frequency of the pawl 703 and the running condition of the bearing. Preferentially, the vibration sensor is a magnetic type vibration sensor, and the alarm is an audible and visual alarm.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (6)
1. A transmission system for main lifting of a casting crane is characterized in that: the transmission system is a symmetrical mechanism and comprises a motor, a brake, a speed reducer and a winding drum which are sequentially connected in a power transmission sequence, and further comprises a fault monitoring system and a ratchet wheel and pawl mechanism; the fault monitoring system comprises a controller, an alarm, a rotating speed sensor arranged between a motor and a brake, a current sensor arranged on a power supply cable of the motor and an adjustable sensor support, wherein the rotating speed sensor and the current sensor are electrically connected to the input end of the controller; the ratchet wheel and pawl mechanism is arranged on a transmission shaft of the middle stage of an input shaft and an output shaft of the speed reducer and comprises a ratchet wheel assembly, a top column and a pawl, wherein the top column and the pawl are arranged on the ratchet wheel assembly, the top end of the top column is hemispherical, a semi-cylindrical groove is arranged at the contact position of the pawl and the top column at the lower end of the pawl, and the rotating radius of the semi-cylindrical groove is larger than that of the top column.
2. The drive system for the main hoist of a ladle crane according to claim 1, wherein: the fault monitoring system further comprises a vibration sensor arranged at a shaft system of the ratchet and pawl mechanism, and the vibration sensor is electrically connected to the input end of the controller and used for monitoring and judging the frequency of pawl tooth jumping.
3. The drive system for the main hoist of a ladle crane according to claim 1, wherein: the middle part of the bevel support is provided with a circular through hole, and a closed type wire binding clip is detachably connected in the circular through hole.
4. A transmission system for the main hoist of a ladle crane according to claim 3, characterized in that: the rotating speed sensor is a non-contact rotating speed sensor, the non-contact rotating speed sensor is arranged on the sensor clamping plate, and a signal line of the non-contact rotating speed sensor is clamped on the closed type wire clamp.
5. The drive system for the main hoist of a ladle crane according to claim 1, wherein: the current sensor is a Hall current sensor.
6. The drive system for a main hoist of a ladle crane according to any one of claims 1 to 5, wherein: the alarm is an audible and visual alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921748279.6U CN210764085U (en) | 2019-10-17 | 2019-10-17 | Transmission system for main lifting of casting crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921748279.6U CN210764085U (en) | 2019-10-17 | 2019-10-17 | Transmission system for main lifting of casting crane |
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| Publication Number | Publication Date |
|---|---|
| CN210764085U true CN210764085U (en) | 2020-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921748279.6U Active CN210764085U (en) | 2019-10-17 | 2019-10-17 | Transmission system for main lifting of casting crane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112269349A (en) * | 2020-10-12 | 2021-01-26 | 首钢京唐钢铁联合有限责任公司 | Method and system for detecting refined RH four-motor driven molten steel car |
-
2019
- 2019-10-17 CN CN201921748279.6U patent/CN210764085U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112269349A (en) * | 2020-10-12 | 2021-01-26 | 首钢京唐钢铁联合有限责任公司 | Method and system for detecting refined RH four-motor driven molten steel car |
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