CN113443560B - Transmission shaft synchronous grease supplementing pump working gap adjusting device and adjusting method thereof - Google Patents
Transmission shaft synchronous grease supplementing pump working gap adjusting device and adjusting method thereof Download PDFInfo
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- CN113443560B CN113443560B CN202010210823.2A CN202010210823A CN113443560B CN 113443560 B CN113443560 B CN 113443560B CN 202010210823 A CN202010210823 A CN 202010210823A CN 113443560 B CN113443560 B CN 113443560B
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- adjusting mechanism
- adjusting
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- support arm
- pump
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/16—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
- B66C23/163—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements where only part of the column rotates, i.e. at least the bottom part is fixed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/46—Position indicators for suspended loads or for crane elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/48—Automatic control of crane drives for producing a single or repeated working cycle; Programme control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
- B66C23/78—Supports, e.g. outriggers, for mobile cranes
- B66C23/80—Supports, e.g. outriggers, for mobile cranes hydraulically actuated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/84—Slewing gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N13/00—Lubricating-pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- General Engineering & Computer Science (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention discloses a device and a method for adjusting the working clearance of a transmission shaft synchronous grease supplementing pump, wherein the device comprises a support arm weight adjusting mechanism, a clearance adjusting mechanism connected to the top of the support arm weight adjusting mechanism and a hoisting equipment assembly arranged in the support arm weight adjusting mechanism; the supporting arm weight adjusting mechanism comprises a base, a supporting arm body, a pulley arranged at the top of the supporting arm body and a control box arranged on the base, wherein a hoisting equipment assembly is arranged in the base, the bottom end of the supporting arm body is connected with the hoisting equipment assembly, the bottom end of the supporting arm body is also provided with a rotating mechanism and a rope device, and a steel wire rope on the rope device is connected with the gap adjusting mechanism through the pulley; the hoisting equipment assembly comprises a lifting oil cylinder, and a piston rod end of the lifting oil cylinder is connected with the bottom end of the support arm body through a ball-type coupler. The invention fundamentally solves the problem that the working clearance of the inner ring and the outer ring of the synchronous pump cannot be accurately adjusted, ensures the center distance between the gears, prolongs the service life of the synchronous pump and reduces the fault loss.
Description
Technical Field
The invention relates to a hot rolling mechanical technology, in particular to a device and a method for adjusting a working clearance of a synchronous grease supplementing pump of a transmission shaft.
Background
At present, most of horizontal rolling mill transmission shafts in rough rolling areas of domestic and foreign hot rolling mills adopt a transmission shaft synchronous grease filling pump to lubricate accessories such as copper slide blocks on shafts. Because the lubricating mode of this kind of fat-liquoring pump is special, need adjust the work clearance of inner and outer lane, but discover this clearance in daily use different because of the pump, very difficult adjustment. Once the clearance adjustment makes mistakes, can shorten the working life of pump greatly, the change process is complicated after the synchronous pump damages, is not convenient for maintain.
The concrete defects are mainly represented as follows:
1) The working principle of the synchronous grease filling pump of the transmission shaft is that lubricating grease is output by using a gear meshing mode, the mode requires that the smaller the center distance deviation between gears is, the better the center distance deviation is, the working clearance of the inner ring and the outer ring of the synchronous pump is directly influenced, and the synchronous grease filling pump can not be accurately adjusted in the actual use process;
2) The large gear in the pump drives the small gear to rotate, and the speed ratio of the two gears is large, so that the rotating speed of the small gear is very high, the teeth of the small gear are broken once the center distance is damaged, the whole pump cannot work, the whole pump needs to be stopped for replacement, the replacement time is about 8 hours, and the overall capacity of the binding wire is seriously influenced;
3) The old shaft synchronous grease filling pump is expensive in manufacturing cost, one Renminbi is about 40 ten thousand yuan, and the manufacturing technology is completely mastered at a supplier, so that the situation brings great pressure to the operation cost of enterprises.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device and a method for adjusting the working clearance of a synchronous grease supplementing pump of a transmission shaft, which fundamentally solve the problem that the working clearance of the inner ring and the outer ring of the synchronous pump cannot be accurately adjusted, ensure the center distance between gears, prolong the service life of the synchronous pump and reduce the fault loss.
In order to achieve the purpose, the invention adopts the following technical scheme:
on one hand, the device for adjusting the working clearance of the transmission shaft synchronous grease supplementing pump is connected to the shell of the grease supplementing pump and comprises a support arm weight adjusting mechanism, a clearance adjusting mechanism connected to the top of the support arm weight adjusting mechanism, a lifting equipment assembly arranged in the support arm weight adjusting mechanism, and a lifting mechanism;
the supporting arm weight adjusting mechanism comprises a base, a supporting arm body, a pulley arranged at the top of the supporting arm body and a control box arranged on the base, wherein a hoisting equipment assembly is arranged in the base, the bottom end of the supporting arm body is connected with the hoisting equipment assembly, a rotating mechanism and a rope device are also arranged at the bottom end of the supporting arm body, and a steel wire rope on the rope device is connected with the gap adjusting mechanism through the pulley;
the hoisting equipment assembly comprises a lifting oil cylinder, and a piston rod end of the lifting oil cylinder is connected with the bottom end of the support arm body through a ball-type coupler.
And a weight detection device and a PLC are arranged in the control box.
The rotating mechanism comprises a gear and gear shaft assembly connected to the bottom end of the support arm body and a servo motor connected to the gear and gear shaft assembly.
The steel wire rope is provided with a balance weight and an infrared position detection device.
And liquid crystal digital display electronic equipment is also arranged on the outer side surface of the control box.
The clearance adjusting mechanism comprises an adjusting mechanism base, an adjusting mechanism cover plate and an adjusting mechanism adjusting bolt;
the adjusting mechanism base comprises a bottom plate, a stop block is connected onto the bottom plate, a U-shaped middle groove is formed in the stop block, guide blocks are additionally arranged on two sides of the middle groove, and the bottom plate is fixed on a shell of the grease supplementing pump through an M12 bolt;
a threaded hole is drilled in the middle of the adjusting mechanism cover plate, two symmetrical through holes are formed in two sides of the threaded hole, and corresponding bolts are arranged in the through holes to fix the adjusting mechanism cover plate on the stop block;
the adjusting mechanism adjusting bolt comprises an adjusting screw rod, the adjusting screw rod penetrates through the threaded hole and is located in the U-shaped middle groove, and an adjusting cushion block and a locking nut are installed at the bottom of the adjusting screw rod.
On the other hand, a method for adjusting the working clearance of a synchronous grease supplementing pump of a transmission shaft comprises the following steps:
installing a grease supplementing pump on a main transmission shaft, fixing the grease supplementing pump on a clearance adjusting mechanism, detecting the actual height of the main transmission shaft through an infrared position detection device, calculating the position of the support arm body needing to be lifted through a PLC (programmable logic controller), and determining the pressure of the lifting oil cylinder through the PLC;
the weight of the grease supplementing pump is input into the liquid crystal digital display electronic equipment, the tension of the steel wire rope is calculated through the PLC, and the position of the balance weight is determined through the calculation of the PLC;
the height of the support arm body and the configured position are fed back to the PLC to confirm the correct position.
The device and the method for adjusting the working clearance of the synchronous grease supplementing pump for the transmission shaft have the following beneficial effects that:
1) The adjusting device can accurately obtain the required gap by adjusting the adjusting bolt, thereby ensuring the center distance precision of the internal gear of the synchronous grease supplementing pump, greatly prolonging the service life of the pump, having low maintenance cost, not needing to be integrally replaced in a short period and having higher economic value;
2) The adjusting device of the invention has prolonged service time on the machine, and does not need to frequently disassemble a large number of accessories for replacing the synchronous pump, thereby saving a large amount of labor;
3) The adjusting device of the invention does not need to be provided with a large number of gaskets, can realize the random adjustment of the gap, can be repeatedly used, has high interchangeability and low manufacturing cost;
4) The adjusting device has the advantages of good universality, high adaptability and very high reliability, and is suitable for transmission shaft synchronous grease supplementing pumps with similar working conditions.
Drawings
FIG. 1 is a schematic view of an adjusting device according to the present invention;
FIG. 2 is a schematic structural diagram of a base of an adjusting mechanism in a gap adjusting mechanism of an adjusting device according to the present invention;
FIG. 3 is a schematic view of a cover plate of the adjusting mechanism in the gap adjusting mechanism of the adjusting device according to the present invention;
FIG. 4 is a schematic view of an adjusting bolt of the adjusting mechanism in the gap adjusting mechanism of the adjusting device according to the present invention;
FIG. 5 is a schematic structural diagram of a lifting device assembly of the adjusting apparatus of the present invention;
FIG. 6 is a schematic illustration of the tuning method of the present invention;
fig. 7 is a control schematic of the adjustment method of the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
Referring to fig. 1 to 5, the clearance adjusting device for a synchronous grease replenishing pump for a transmission shaft according to the present invention comprises a support arm weight adjusting mechanism, a clearance adjusting mechanism 1 connected to the top of the support arm weight adjusting mechanism, a casing for connecting the clearance adjusting mechanism 1 to the grease replenishing pump 100, and a lifting apparatus assembly disposed in the support arm weight adjusting mechanism.
Preferably, the support arm weight adjusting mechanism comprises a base 2, a support arm body 3, a pulley 4 arranged at the top 3 of the support arm body, and a control box 5 arranged on the base 2, wherein the base 2 is used for installing a hoisting equipment assembly, the bottom end of the support arm body 3 is connected with the hoisting equipment assembly, the bottom end of the support arm body 3 is also provided with a rotating mechanism and a rope device 6, and a steel wire rope 7 on the rope device 6 penetrates through the pulley 4 and is connected with the gap adjusting mechanism 1.
Preferably, the steel wire rope 7 is provided with a counterweight 8 and an infrared position detection device 9, the actual height of the main transmission shaft 200 is detected by the infrared position detection device 9, and the height of the support arm body 3 is adjusted to a proper position by the lifting oil cylinder 11.
Preferably, a liquid crystal digital display electronic device 10 is further arranged on the outer side surface of the control box 5.
The lifting torque of the support arm body 3 can be set according to the weight of the actual fat supplementing pump 100, and the liquid crystal digital display electronic equipment 10 is adopted, so that the set value can be more accurate.
Preferably, the hoisting equipment assembly comprises a lifting oil cylinder 11, the piston rod end of the lifting oil cylinder is connected with the bottom end of the support arm body 3 through a ball coupling 12, the height of the support arm body 3 can be adjusted according to actual field conditions, and the whole support arm weight adjusting mechanism can effectively work.
Preferably, the rotating mechanism comprises a gear and gear shaft assembly 13 connected to the bottom end of the support arm body 3 and a servo motor 14 connected to the gear and gear shaft assembly 13, the servo motor 14 drives the gear and gear shaft assembly 13 to rotatably adjust the support arm body 3 and accurately position the support arm, so that the position of the whole support arm weight adjusting mechanism is ensured to be correct, and the adjusting device has two positions of working and maintenance.
Preferably, a weight detection device and a PLC are arranged in the control box 5, the weight detection device is used for detecting the tension of the steel wire rope 7, controlling the position of the counterweight 8, and ensuring that the tension of the steel wire rope 7 meets the standard by detecting the actual position of the counterweight 8.
Preferably, the gap adjusting mechanism includes an adjusting mechanism base 15, an adjusting mechanism cover plate 16 and an adjusting mechanism adjusting bolt 17.
Preferably, the adjusting mechanism base 15 includes a bottom plate 151, on which a stopper 152 is disposed, the thickness of the stopper 152 is appropriately widened to increase the overall strength, a U-shaped middle groove is disposed on the stopper 152, guide blocks 153 are additionally disposed on two sides of the middle groove, and the bottom plate 151 is fixed on the casing of the grease replenishing pump 100 through M12 bolts.
Preferably, a threaded hole 161 is drilled in the middle of the adjusting mechanism cover plate 16, the size of the threaded hole 161 is set according to the requirement on the site, two symmetrical through holes 162 are formed on two sides of the threaded hole 161, and corresponding bolts are arranged in the through holes 162, so that the adjusting mechanism cover plate 16 is fixed on the stopper 152. Meanwhile, the thickness of the cover plate 16 of the adjusting mechanism is properly increased, and the integral strength after adjustment is ensured.
Preferably, the adjusting bolt 17 of the adjusting mechanism includes an adjusting screw 171 passing through the threaded hole 161 and located in the U-shaped middle groove, and an adjusting pad 172 is installed at the bottom of the adjusting screw 171 and locked by a locking nut 173 after being adjusted to a required gap, so as to ensure that the gap does not change.
Referring to fig. 6 to 7, the present invention further provides a method for adjusting a working gap of a synchronous grease replenishing pump for a transmission shaft, comprising:
installing a grease supplementing pump 100 on a main transmission shaft 200, fixing the grease supplementing pump 100 on a clearance adjusting mechanism 1, detecting the actual height A of the main transmission shaft 200 through an infrared position detecting device 9, calculating a position Q1 of a support arm body 3 needing to be lifted through a PLC (programmable logic controller), and determining the pressure P2 of a lifting oil cylinder 11 through the PLC;
inputting the weight G of the fat supplementing pump 100 into the liquid crystal digital display electronic equipment 10, calculating the tension P1 of the steel wire rope 7 through PLC, and determining the position Q2 of the counterweight 8 through PLC calculation;
the height Q1 of the support arm body 3 and the position Q2 of the arrangement 8 are fed back to the PLC to confirm the correct position. In the whole production process, the height of the main transmission shaft is continuously changed due to the change of the thickness of the rolled plate blank, so that the height of the whole supporting arm is changed, and the correct position needs to be matched according to the height of the main transmission shaft.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that the changes and modifications of the above embodiments are within the scope of the appended claims as long as they are within the true spirit of the present invention.
Claims (4)
1. The utility model provides a synchronous fat liquoring pump working gap adjusting device of transmission shaft, links to on the shell of fat liquoring pump which characterized in that: the device comprises a support arm weight adjusting mechanism, a gap adjusting mechanism connected to the top of the support arm weight adjusting mechanism, a lifting equipment assembly arranged in the support arm weight adjusting mechanism, and a grease supplementing pump, wherein the gap adjusting mechanism is used for connecting a shell of the grease supplementing pump;
the supporting arm weight adjusting mechanism comprises a base, a supporting arm body, a pulley arranged at the top of the supporting arm body and a control box arranged on the base, wherein a hoisting equipment assembly is arranged in the base, the bottom end of the supporting arm body is connected with the hoisting equipment assembly, a rotating mechanism and a rope device are also arranged at the bottom end of the supporting arm body, and a steel wire rope on the rope device is connected with the gap adjusting mechanism through the pulley;
the hoisting equipment assembly comprises a lifting oil cylinder, the piston rod end of the lifting oil cylinder is connected with the bottom end of a support arm body through a ball-type coupler,
a weight detection device and a PLC are arranged in the control box,
the steel wire rope is provided with a balance weight and an infrared position detection device,
and liquid crystal digital display electronic equipment is also arranged on the outer side surface of the control box.
2. The device for adjusting the working clearance of the synchronous grease replenishing pump for the transmission shaft according to claim 1, characterized in that: the rotating mechanism comprises a gear and gear shaft assembly connected to the bottom end of the support arm body and a servo motor connected to the gear and gear shaft assembly.
3. The device for adjusting the working clearance of the synchronous grease replenishing pump for the transmission shaft according to claim 1, characterized in that: the clearance adjusting mechanism comprises an adjusting mechanism base, an adjusting mechanism cover plate and an adjusting mechanism adjusting bolt;
the adjusting mechanism base comprises a bottom plate, a stop block is connected onto the bottom plate, a U-shaped middle groove is formed in the stop block, guide blocks are additionally arranged on two sides of the middle groove, and the bottom plate is fixed on a shell of the grease supplementing pump through an M12 bolt;
a threaded hole is drilled in the middle of the adjusting mechanism cover plate, two symmetrical through holes are formed in two sides of the threaded hole, and corresponding bolts are arranged in the through holes to fix the adjusting mechanism cover plate on the stop block;
the adjusting mechanism adjusting bolt comprises an adjusting screw rod, the adjusting screw rod penetrates through the threaded hole and is located in the U-shaped middle groove, and an adjusting cushion block and a locking nut are installed at the bottom of the adjusting screw rod.
4. A method for adjusting a device for adjusting the working clearance of a synchronous grease replenishing pump for a drive shaft according to any one of claims 1 to 3, wherein:
installing a grease supplementing pump on a main transmission shaft, fixing the grease supplementing pump on a clearance adjusting mechanism, detecting the actual height of the main transmission shaft through an infrared position detection device, calculating the position of the support arm body needing to be lifted through a PLC (programmable logic controller), and determining the pressure of the lifting oil cylinder through the PLC;
the weight of the grease supplementing pump is input into the liquid crystal digital display electronic equipment, the tension of the steel wire rope is calculated through the PLC, and the position of the balance weight is determined through the calculation of the PLC;
the height and the configured position of the support arm body are fed back to the PLC to confirm the correct position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010210823.2A CN113443560B (en) | 2020-03-24 | 2020-03-24 | Transmission shaft synchronous grease supplementing pump working gap adjusting device and adjusting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010210823.2A CN113443560B (en) | 2020-03-24 | 2020-03-24 | Transmission shaft synchronous grease supplementing pump working gap adjusting device and adjusting method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113443560A CN113443560A (en) | 2021-09-28 |
| CN113443560B true CN113443560B (en) | 2022-10-21 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09286580A (en) * | 1996-04-23 | 1997-11-04 | Mitsubishi Denki Bill Techno Service Kk | Automatic adjusting device for plunger margin of hydraulic elevator |
| CN104235583A (en) * | 2013-06-21 | 2014-12-24 | 宝山钢铁股份有限公司 | Oil recharging device for cross bearings of main drive shaft of rolling mill |
| CN105460827A (en) * | 2014-12-01 | 2016-04-06 | 国网山东省电力公司潍坊供电公司 | Simple and detachable electric power hoisting tool |
| CN206447512U (en) * | 2017-01-21 | 2017-08-29 | 太原理工大学 | A kind of centralized lubricating system mends fat pump standard drum high cleaning rate convenient changing device |
| CN209140229U (en) * | 2018-10-26 | 2019-07-23 | 国电联合动力技术(连云港)有限公司 | A kind of wind generating set pitch control driving assembly regulating device |
-
2020
- 2020-03-24 CN CN202010210823.2A patent/CN113443560B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09286580A (en) * | 1996-04-23 | 1997-11-04 | Mitsubishi Denki Bill Techno Service Kk | Automatic adjusting device for plunger margin of hydraulic elevator |
| CN104235583A (en) * | 2013-06-21 | 2014-12-24 | 宝山钢铁股份有限公司 | Oil recharging device for cross bearings of main drive shaft of rolling mill |
| CN105460827A (en) * | 2014-12-01 | 2016-04-06 | 国网山东省电力公司潍坊供电公司 | Simple and detachable electric power hoisting tool |
| CN206447512U (en) * | 2017-01-21 | 2017-08-29 | 太原理工大学 | A kind of centralized lubricating system mends fat pump standard drum high cleaning rate convenient changing device |
| CN209140229U (en) * | 2018-10-26 | 2019-07-23 | 国电联合动力技术(连云港)有限公司 | A kind of wind generating set pitch control driving assembly regulating device |
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| CN113443560A (en) | 2021-09-28 |
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