CN115506432A - Direct-drive lifting mechanism of mining excavator and excavator - Google Patents

Direct-drive lifting mechanism of mining excavator and excavator Download PDF

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Publication number
CN115506432A
CN115506432A CN202211107577.3A CN202211107577A CN115506432A CN 115506432 A CN115506432 A CN 115506432A CN 202211107577 A CN202211107577 A CN 202211107577A CN 115506432 A CN115506432 A CN 115506432A
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CN
China
Prior art keywords
motor
winding drum
lifting mechanism
drum
mining excavator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211107577.3A
Other languages
Chinese (zh)
Inventor
赵腾云
毛瑞
孙刚
王波
石欣
薛红
武建强
贾彦昌
崔敏民
田筱剑
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taiyuan Heavy Industry Co Ltd
Original Assignee
Taiyuan Heavy Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taiyuan Heavy Industry Co Ltd filed Critical Taiyuan Heavy Industry Co Ltd
Priority to CN202211107577.3A priority Critical patent/CN115506432A/en
Publication of CN115506432A publication Critical patent/CN115506432A/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
    • E02F3/58—Component parts
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267—Valves or distributors

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention discloses a mining excavator direct-drive lifting mechanism and an excavator, wherein the direct-drive lifting mechanism comprises: the lifting device comprises a lifting drum, a first motor, a second motor and a workbench; the lifting winding drum comprises a first winding drum, a second winding drum and a brake disc, wherein the first winding drum and the second winding drum are respectively arranged on two sides of the brake disc, positioned through a seam allowance and connected with the brake disc through a super bolt; the first motor is connected with the end part of the first winding drum, and the second motor is connected with the end part of the second winding drum and used for driving the first winding drum and the second winding drum to synchronously rotate; the bottoms of the first motor and the second motor are connected to the workbench, and the first motor and the second motor are permanent magnet motors. The lifting winding drum adopts spigot positioning, and the super bolt is fixed in a split structure, so that the structure is simple, the processing is convenient, and the positioning precision is high. The permanent magnet motor is adopted to directly drive the winding drum, so that the efficiency is improved by 15% -20%, the energy consumption and the heat dissipation capacity are greatly reduced, the indoor temperature is improved, the burden of a ventilation system is reduced, the failure rate is reduced, and the mobility of equipment is improved.

Description

Direct-drive lifting mechanism of mining excavator and excavator
Technical Field
The invention relates to the technical field of mining equipment, in particular to a direct-drive lifting mechanism of a mining excavator and the mining excavator.
Background
The mining excavator completes the operations of cutting (pushing) an excavation object, filling a bucket (lifting and pushing), transferring (rotating), unloading (opening bucket), returning to a cutting point (lifting and rotating and pushing), deep excavation (walking) and the like by the excavator through the cooperative operation of five transmission mechanisms of lifting, pushing, rotating, walking and opening bucket. The reliability and efficiency of the lifting mechanism directly affects the performance of the equipment.
As shown in fig. 1, which is a schematic diagram of a lifting mechanism in the prior art, a dual motor 101 drives a two-stage parallel transmission 102, and finally drives a lifting drum device 103, and the whole lifting mechanism is connected to a middle platform 104 through a pin. The lifting mechanism adopts a driving system of alternating-current variable-frequency speed regulation and speed reducer, the final transmission needs lower speed and generally needs 2-3-level speed reduction to realize, the mechanical efficiency is generally 78-80%, the mechanical transmission efficiency is lower, the energy consumption is higher, and the heat productivity is large.
Disclosure of Invention
In order to solve part or all of the technical problems in the prior art, the invention provides a direct-drive lifting mechanism of a mining excavator and the excavator. The technical scheme is as follows:
in a first aspect, a direct-drive lifting mechanism of a mining excavator is provided, which comprises: the device comprises a lifting winding drum, a first motor, a second motor and a workbench; the lifting winding drum comprises a first winding drum, a second winding drum and a brake disc, wherein the first winding drum and the second winding drum are respectively arranged on two sides of the brake disc, positioned through a seam allowance and connected with the brake disc through a super bolt; the first motor is connected with the end part of the first winding drum, and the second motor is connected with the end part of the second winding drum and is used for driving the first winding drum and the second winding drum to synchronously rotate; the bottom of the first motor and the bottom of the second motor are connected to the workbench, and the first motor and the second motor are permanent magnet motors.
In some optional implementations, the output shaft of the first motor is positioned with the end of the first winding drum through a seam allowance and connected through a bolt, and the output shaft of the second motor is positioned with the end of the second winding drum through a seam allowance and connected through a bolt.
In some optional implementations, the first motor and the second motor are connected with the workbench through an expansion sleeve.
In some optional implementations, the worktable has a double-lug structure, and the first motor and the second motor have a single-lug structure and are respectively disposed on two sides of the worktable.
In some optional implementation manners, auxiliary supports are arranged on the first motor and the second motor, and are used for supporting the motors in the installation process and disassembling the motors after the motors are installed.
In some optional implementation manners, the hydraulic pressure station further comprises a hydraulic brake, a hydraulic pressure station and a control module, the hydraulic pressure station is connected with the hydraulic brake through a hydraulic pipeline, an electromagnetic directional valve is arranged on the hydraulic pipeline, and the control module is electrically connected with the electromagnetic directional valve and used for controlling the opening and closing of the electromagnetic directional valve so as to control the oil inlet and the oil return of the hydraulic brake.
In some alternative implementations, the hydraulic brake includes multiple sets of friction discs arranged in a center on either side of the brake disc.
In some optional implementations, the bearing installation modes of the first motor and the second motor are a one-side floating mode and a one-side fixed mode.
In some optional implementation manners, speed encoders are disposed on bearings of the first motor and the second motor, the speed encoders are connected to the control module, and the control module is further configured to control the rotation speeds of the first motor and the second motor according to the detected speed information.
In a second aspect, there is provided an excavator comprising a mining excavator direct drive lifting mechanism as described in any one of the above.
The technical scheme of the invention has the following main advantages:
according to the direct-drive lifting mechanism of the mining excavator and the mining excavator, the lifting drum is of a split type structure of the first drum, the brake disc and the second drum; the first winding drum, the second winding drum and the brake disc are positioned by adopting rabbets and are fixed by super bolts; compared with the original structure, the structure is simple, the processing is convenient, and the positioning precision is high. The permanent magnet motor is adopted to directly drive the winding drum to replace the traditional mode of an alternating current variable frequency motor, a speed reducer and the winding drum, so that the efficiency is improved by 15-20%; the failure rate of the lifting mechanism is reduced by more than 80%, and meanwhile, the energy consumption and the heat dissipation capacity are greatly reduced, the indoor temperature is improved, the burden of a ventilation system is reduced, and the failure rate is reduced, so that the mobility of equipment is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. On the attached sheet
In the figure:
fig. 1 is a schematic structural diagram of a lifting mechanism provided in the prior art;
fig. 2 is a side cross-sectional view of a direct drive lifting mechanism according to an embodiment of the present invention;
FIG. 3 is a front view of a direct drive lift mechanism provided in accordance with an embodiment of the present invention;
fig. 4 is a top view of a direct drive lifting mechanism according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.
In a first aspect, an embodiment of the present invention provides a direct-drive lifting mechanism for a mining excavator, as shown in fig. 2 to 4, including: a hoist drum, a first motor 205, a second motor 207, and a table 210; the lifting winding drum comprises a first winding drum 201, a second winding drum 203 and a brake disc 202, wherein the first winding drum 201 and the second winding drum 203 are respectively arranged on two sides of the brake disc 202, are positioned with the brake disc 202 through a seam allowance and are connected through a super bolt 204; the first motor 205 is connected with the end of the first winding drum 201, and the second motor 207 is connected with the end of the second winding drum 203, and is used for driving the first winding drum 201 and the second winding drum 203 to synchronously rotate; the bottom of the first motor 205 and the second motor 207 are connected to the worktable 210, and the first motor 205 and the second motor 207 are permanent magnet motors.
The working platform 210 is a mounting position of the lifting mechanism, and may be a middle platform of the excavator, which is the same as the mounting position of the lifting mechanism in the prior art.
In the embodiment of the invention, the lifting winding drum adopts a split structure of a first winding drum 201, a brake disc 202 and a second winding drum 203; the first winding drum 201, the second winding drum 203 and the brake disc 202 are positioned by adopting rabbets, and the super bolts 204 are fixed; compared with the original structure, the structure is simple, the processing is convenient, and the positioning precision is high. The traditional mode that a permanent magnet motor directly drives a winding drum to replace an alternating current variable frequency motor, a speed reducer and the winding drum is adopted, so that the efficiency is improved by 15% -20%; the failure rate of the lifting mechanism is reduced by more than 80%, and meanwhile, the energy consumption and the heat dissipation capacity are greatly reduced, the indoor temperature is improved, the burden of a ventilation system is reduced, and the failure rate is reduced, so that the mobility of equipment is improved.
An output shaft of the first motor 205 and an end of the first winding drum 201 are positioned through a seam allowance and connected through a bolt, and an output shaft of the second motor 207 and an output shaft of the second winding drum 203 and an end of the second winding drum 203 are positioned through a seam allowance and connected through a bolt. So set up, guarantee to promote the axiality of reel and motor.
Optionally, auxiliary supports are disposed on the first motor 205 and the second motor 207, and are used for supporting the motors during the installation process and detaching the motors after the installation is completed. Wherein, the auxiliary stay can be for playing the bearing of auxiliary stay effect, promptly, the auxiliary stay can be the auxiliary stay bearing. The first motor 205 and the second motor 207 are connected with the workbench 210 through an expansion sleeve 209. When the device is installed, the first motor 205 and the second motor 207 are connected to two sides of the lifting drum, the first motor 205 and the second motor 207 are supported by the first auxiliary support 206 and the second auxiliary support 208 respectively, and then the bottoms of the first motor 205 and the second motor 207 are fixed on the middle platform through the expansion sleeve 209. After the motor is installed, the first auxiliary support 206 and the second auxiliary support 208 are removed, the auxiliary supports play a supporting role during installation of the motor, and meanwhile, after the lifting mechanism is integrally installed on the middle platform, the whole motor is restrained, so that the motor is required to be detached.
The auxiliary support and the main bearing form a simple beam structure to support the motor shaft together and play a supporting role when the motor is hoisted; when the two motors and the lifting winding drum are installed together and installed on the workbench 210, the auxiliary support needs to be detached, the auxiliary support is prevented from being over-constrained to the whole lifting machine, additional load is formed on the winding drum, and the main bearings of the two motors form a simply supported beam structure to effectively support the lifting winding drum.
In some optional implementations of the present embodiment, the worktable 210 has a double-lug structure, and the first motor 205 and the second motor 207 have a single-lug structure, and are respectively disposed on two sides of the worktable 210. With such an arrangement, the ear plates of the first motor 205 and the second motor 207 are respectively opposite to one ear plate of the workbench 210, so as to ensure more stable support.
In some optional implementation manners of this embodiment, as shown in fig. 3 and fig. 4, the direct-drive lifting mechanism further includes a hydraulic brake 301, a hydraulic station 401 and a control module, the hydraulic station 401 is connected to the hydraulic brake 301 through a hydraulic pipeline, an electromagnetic directional valve is arranged on the hydraulic pipeline, and the control module is electrically connected to the electromagnetic directional valve and is used for controlling the electromagnetic directional valve to open and close so as to control oil inlet and oil return of the hydraulic brake 301. The control module controls the oil inlet and the oil return of the hydraulic brake 301 through the electromagnetic directional valve, the safety is high, the response is fast, and when the equipment is powered off or suddenly stops, the response speed of the hydraulic brake 301 is fast. Because the electromagnetic directional valve is adopted, the performance of the pneumatic diaphragm type quick exhaust valve is far higher than that of a pneumatic diaphragm type quick exhaust valve in the prior art, the abnormal abrasion of a brake caused by freezing and sticking or air leakage of the quick exhaust valve is avoided, meanwhile, the hydraulic brake 301 is a wet brake, and a friction disc is immersed in lubricating oil, so that the heat productivity of friction during braking is reduced, and the service life of the brake is greatly prolonged. The hydraulic brake 301 is a normally open brake, and is released in normal operation, so that the lifting drum operates normally; when the equipment is powered off or suddenly stopped accidentally, the hydraulic brake 301 clamps the brake disc 202 quickly, and safe and emergency braking is carried out on the lifting winding drum to prevent the equipment from being out of control.
Optionally, the hydraulic brake 301 comprises multiple sets of friction discs, the multiple sets of friction discs being arranged centrally on either side of the brake disc 202. The pressure is uniformly applied to the two sides of the brake disc 202 through the multiple groups of friction discs for braking, the braking process is stable, and the braking effect is improved. By way of example, 10 sets of friction discs in the hydraulic brake 301 are arranged in a centered manner on both sides of the brake disc 202 of the lifting drum, and compared with the prior art, the brake is mounted at the lifting drum, so that the maximum protection of the lifting mechanism can be realized; in the prior art, a brake is arranged at a first lifting shaft, if broken teeth occur at the meshing position of the first lifting shaft and a second lifting shaft or broken teeth occur at the meshing position of the second lifting shaft and a lifting drum gear, the lifting drum cannot be braked certainly, and the lifting drum is out of control, so that equipment is out of control; the brake is mounted at the hoisting drum, which is completely avoided.
Alternatively, the bearings of the first motor 205 and the second motor 207 are installed in a one-side floating and one-side fixed manner. The fixing mode has simple structure, convenient installation and easy adjustment. And, a speed encoder 211 is provided on one side thereof, the speed encoder 211 is connected with a control module, and the control module is further configured to control the rotation speeds of the first motor 205 and the second motor 207 according to the detected speed information. Through speed signal feedback, closed-loop control is formed on the motors, the two motors are ensured to run synchronously, and a single motor is prevented from bearing the load of a lifting mechanism.
In a second aspect, an embodiment of the invention provides an excavator, which comprises a direct-drive lifting mechanism of a mining excavator as described in any one of the above. Therefore, the lifting mechanism also has all the beneficial effects of the direct-drive lifting mechanism, and the description is omitted here.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, "front", "rear", "left", "right", "upper" and "lower" in this document are referred to the placement states shown in the drawings.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. The utility model provides a mining excavator directly drives hoist mechanism which characterized in that includes: the lifting device comprises a lifting drum, a first motor, a second motor and a workbench;
the lifting winding drum comprises a first winding drum, a second winding drum and a brake disc, wherein the first winding drum and the second winding drum are respectively arranged on two sides of the brake disc, are positioned with the brake disc through a seam allowance and are connected through a super bolt;
the first motor is connected with the end part of the first winding drum, and the second motor is connected with the end part of the second winding drum and is used for driving the first winding drum and the second winding drum to synchronously rotate;
the bottom of the first motor and the bottom of the second motor are connected to the workbench, and the first motor and the second motor are permanent magnet motors.
2. The mining excavator direct drive lifting mechanism as claimed in claim 1, wherein the output shaft of the first motor is positioned with the end of the first drum through a spigot and connected by a bolt, and the output shaft of the second motor is positioned with the end of the second drum through a spigot and connected by a bolt.
3. The mining excavator direct drive lifting mechanism of claim 1, wherein the first motor and the second motor are connected with the workbench through expansion sleeves.
4. The mining excavator direct-drive lifting mechanism according to claim 1, wherein the workbench is of a double-lug structure, and the first motor and the second motor are of a single-lug structure and are respectively arranged on two sides of the workbench.
5. The mining excavator direct drive lifting mechanism as claimed in claim 1, wherein auxiliary supports are provided on both the first motor and the second motor for supporting the motors during installation and for disassembly after installation.
6. The mining excavator direct-drive lifting mechanism according to claim 1, further comprising a hydraulic brake, a hydraulic station and a control module, wherein the hydraulic station is connected with the hydraulic brake through a hydraulic pipeline, an electromagnetic directional valve is arranged on the hydraulic pipeline, and the control module is electrically connected with the electromagnetic directional valve and used for controlling the electromagnetic directional valve to open and close so as to control oil inlet and oil return of the hydraulic brake.
7. The mining excavator direct drive lift mechanism of claim 6 wherein the hydraulic brake comprises a plurality of sets of friction discs arranged centrally on either side of the brake disc.
8. The mining excavator direct drive lifting mechanism as claimed in claim 6, wherein the bearing mounting modes of the first motor and the second motor are a one-side floating mode and a one-side fixed mode.
9. The mining excavator direct drive lifting mechanism of claim 8, wherein speed encoders are arranged on bearings of the first motor and the second motor, the speed encoders are connected with the control module, and the control module is further used for controlling the rotating speeds of the first motor and the second motor according to detected speed information.
10. An excavator, comprising a mining excavator direct drive lifting mechanism as claimed in any one of claims 1 to 9.
CN202211107577.3A 2022-09-13 2022-09-13 Direct-drive lifting mechanism of mining excavator and excavator Pending CN115506432A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211107577.3A CN115506432A (en) 2022-09-13 2022-09-13 Direct-drive lifting mechanism of mining excavator and excavator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211107577.3A CN115506432A (en) 2022-09-13 2022-09-13 Direct-drive lifting mechanism of mining excavator and excavator

Publications (1)

Publication Number Publication Date
CN115506432A true CN115506432A (en) 2022-12-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211107577.3A Pending CN115506432A (en) 2022-09-13 2022-09-13 Direct-drive lifting mechanism of mining excavator and excavator

Country Status (1)

Country Link
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201864519U (en) * 2010-11-24 2011-06-15 山东泰山天盾矿山机械有限公司 Split connection structure for brake disc of mine hoist
CN202265847U (en) * 2011-09-29 2012-06-06 太原重工股份有限公司 Lifting mechanism of mechanical mining excavator
CN204781056U (en) * 2015-06-16 2015-11-18 太原重工股份有限公司 Mechanism of fighting is left to excavator
CN114482162A (en) * 2021-12-30 2022-05-13 太原重工股份有限公司 Mining excavator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201864519U (en) * 2010-11-24 2011-06-15 山东泰山天盾矿山机械有限公司 Split connection structure for brake disc of mine hoist
CN202265847U (en) * 2011-09-29 2012-06-06 太原重工股份有限公司 Lifting mechanism of mechanical mining excavator
CN204781056U (en) * 2015-06-16 2015-11-18 太原重工股份有限公司 Mechanism of fighting is left to excavator
CN114482162A (en) * 2021-12-30 2022-05-13 太原重工股份有限公司 Mining excavator

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