CN201246456Y

CN201246456Y - Belt conveyor liquid viscosity stepless speed governor

Info

Publication number: CN201246456Y
Application number: CNU200720026440XU
Authority: CN
Inventors: 周满山; 张媛
Original assignee: 周满山
Current assignee: Libo Heavy Machine Technology Co Ltd
Priority date: 2007-08-17
Filing date: 2007-08-17
Publication date: 2009-05-27
Anticipated expiration: 2017-08-17

Abstract

The utility model discloses a liquid viscous stepless speed regulating device of a belt conveyor, which comprises a case body, a driving shaft and a driven shaft which are arranged coaxially are disposed in the case body, the driving shaft is in pin joint with a driving friction plate group which is composed of a plurality of driving friction plates, the driven shaft is in pin joint with a driven friction plate group which is composed of a plurality of driven friction plates, the driving friction plates and the driven friction plates are in interval arrangement in axial direction, the driven friction plates and the driven friction plates all can move axially under the action of pistons, and the driven friction plates respectively include a graphite base friction plate, a copper base friction plate and a paper base friction plate from near to far corresponding to the pistons. After utilizing the structure, the friction torque and the temperature among the friction plates are balanced, thereby increasing the operation synchronicity among the friction plates. The structure sufficiently utilizes the characteristics of stress, heat transmission, wear and the like of different materials to improve the power transmission property and the heat transmission property of a transmission system, thereby effectively avoiding burning the friction plates, and prolonging the service life of equipment.

Description

Belt conveyor lipuid viscosity stepless speed regulator

Technical field

The utility model relates to the soft start technical field that is applied to this permanent torque apparatus of Belt Conveyors, especially a kind of stepless speed regulation controllable start arrangements for speed regulation that place the dependence liquid viscosity shear transfer moment of retarder high speed shaft.

Background technique

At present, the technical measures that both at home and abroad belt conveyer soft starting adopted mainly contain following two kinds:

(1) adopt variable speed fluid coupling, it is to be the dydraudynamic drive unit of medium with liquid.Mainly form by pump impeller, turbine and housing, it is installed between motor and the working machine, pump impeller links to each other with motor through input shaft, be the power input end, turbine links to each other with retarder through output shaft, is power take-off, and both structure shapes are similar, become axial symmetric arrays, form liquid stream circulate circle jointly.During work, in circulate circle, charge into working oil by oil feed pump, when the motoring pump impeller rotates, the working oil that enters pump impeller because of action of centrifugal force flows to outer rim by the pump impeller inboard, forms high-voltage high-speed liquid flow impact turbine blade under the drive of blade, turbine and pump impeller are rotated in the same way, working oil is flowed to inboard in turbine by outer rim, will flow into the mechanical energy of high energy liquid circulation the becoming output shaft in the turbine, thereby realizes the flexibility transmission of energy.Degree of filling by changing working liquid body in the circulate circle just can be under the constant condition of motor speed, and realization is to the stepless speed regulation of working machine.The degree of filling of working liquid body regulates by electric actuator that the scoop tube insertion depth finishes in the circulate circle.

Variable speed fluid coupling is accomplished to prolong the starting time, is realized that empty load of motor starts, improves the full load starting performance of conveyor.But there is following deficiency in this system: 1. fluid coupling when proper functioning-as 3～5% slippage is arranged, has the loss of 3-5% transmission efficiency this moment, and conveying mechanism long-term work when mostly long, the coupler heating value is big, wastes a large amount of energy; 2. variable speed fluid coupling can't realize that velocity ratio is 1 direct transmission operating conditions: 8. there is a unsettled transition zone all the time in variable speed fluid coupling in starting process, make starting performance desirable not enough: when 4. realizing producing in serial form, the critical piece versatility is poor between the different fluid coupling of power; 5. the volume of fluid coupling is bigger, and system control performance and control accuracy are relatively poor.

(2) adopt frequency variator, frequency variator has soft starting characteristic preferably, can not be fit to be applied to explosion-proof frequency converter that mine down-hole use but also develop at present at home and abroad; For high pressure, big capacity squirrel-cage motor, adopt the frequency variator investment greatly in addition, reliability is also relatively poor, and needs to adopt special motor; Frequency variator can produce powerful signal interference simultaneously, influences the proper functioning of other electrical control equipments.These have all limited the application of frequency variator in industrial production.

(3) hydro viscous drive.It has only U.S. Dodge (DOD6E) company recent researches abroad and has developed the controlled transmission system of a kind of machinery (Controlled Start, Transmission System), it utilizes liquid viscosity is that oil-shear power is come transferring power, and can long-term stable operation under the situation of slippage arranged, its main frame unites two into one retarder and slip clutch, clutch is arranged in the retarder lower velocity shaft, arranging active friction plate across and from movable friction plate, they rely on external splines and internal spline to be contained on input shaft and the output shaft respectively, oil pressure P regulates oil slick thickness h in the change operating cylinder, thereby reaches the purpose that changes output speed and torque.It can improve the transmission service behaviour of heavy machinery greatly, but this system complex manufacturing technology, processing technology requires high, and cost and investment are bigger, and maintenance cost is higher.Be not suitable for China's national situation and to the existing simple technical innovation of heavy duty equipment.

The patent No. is that 95234479.3 Chinese utility model patents disclose and a kind ofly aim at Belt Conveyors that Belt Conveyors designs and develops with the sticking soft starting device of liquid, its active friction plate and all adopt friction plate of the same race from movable friction plate, this certainly will cause the difference of friction torque of each friction pair bigger, the friction plate heating value of simultaneously close piston is than the heat height that produces between the far-end friction plate, unbalanced its heat of temperature can not in time be taken away by lubricated oil between friction plate, then be easy to generate the situation of burning friction plate, simultaneously, owing to adopt friction plate of the same race along with the increase of group number will cause comparatively fast occurring damaging in advance near the friction disc wear of piston, and extremely low away from the slow utilization ratio of the friction disc wear of piston, do not have due effect.The friction disc wear inequality influences the normal use of equipment.

Summary of the invention

The purpose of this utility model provides a kind of liquid sliminess soft starter equipment that can really be applicable to controlled slow parking of this permanent torque loads of Belt Conveyors with regard to being at the defective of above-mentioned prior art, in conjunction with the multiple operating conditions of Belt Conveyors, solve the problem that permanent moment of torsion heavy duty plays parking, the liquid viscosity transmission device burns friction plate.

The technological scheme that the utility model is taked is: a kind of belt conveyor lipuid viscosity stepless speed regulator, it has a casing, be provided with the driving shaft and the driven shaft of coaxial setting in the casing, be articulated with the active friction plate group of forming by the multi-disc active friction plate on the driving shaft, be articulated with on the driven shaft by multi-disc from movable friction plate form from the movable friction plate group, active friction plate and arrange at interval vertically from movable friction plate from the close-by examples to those far off is respectively graphite-based friction plate, copper-base friction plate, paper-base friction wafer from movable friction plate with respect to piston.

All be the friction plate that adopts single variety generally from movable friction plate, the utility model adopts the friction plate compound mode of multiple different qualities, it is in proper order for being the graphite-based friction plate from close piston, copper-base friction plate, paper-base friction wafer, generally speaking, the friction factor of above-mentioned graphite-based friction plate is less than copper-base friction plate, the friction factor of copper-base friction plate is less than paper-base friction wafer, its thermal capacity and wear resistance then are that order strengthens, like this, after adopting said structure, then can make the friction torque between friction plate, temperature obtains equilibrium, has strengthened the synchronism of moving between friction plate.

The beneficial effects of the utility model are: structure of the present utility model makes full use of characteristics such as stressed, the heat transfer, wearing and tearing of different materials, power transmission, the temperature conductivity of transmission system have been improved, avoid burning the phenomenon of friction plate effectively, prolonged the working life of equipment.

It utilizes the viscosity of liquid and the shearing of oil film to come transferring power, and it is installed between motor and the retarder, can realize the slowly steady controllable start of empty load of motor starting, conveyor, thereby reaches the purpose of soft start.

Below in conjunction with accompanying drawing and example the utility model is further specified.

Description of drawings

Figure is the utility model concrete structure schematic representation.

Embodiment

The utility model mainly is made up of basic machine and hydraulic system.As shown in the figure, the mechanical structure main body is by driving shaft 1, end cap 2, seal ring 3, control oil distribution casing 4, piston 5, supporting disk 6, spring 7, housing 8, active friction plate 9, form from movable friction plate 10, passive drum 11, lubricated oil distribution casing 12, driven shaft 14, Sealing etc.Driving shaft 1 is rotated by driven by motor, link into an integrated entity by supporting disk 6 and passive drum 11, active friction plate group 9 is by external tooth and passive bulging internal tooth setting-in, axial arranged along passive drum, from the external tooth setting-in of movable friction plate group 10 by internal tooth and driven shaft 14, principal and subordinate's movable friction plate is arranged at interval, can be in axial sliding under responsive to axial force simultaneously; When driving shaft drives the active friction plate rotation, forming the oil film drive by the viscous fluid between the friction plate rotates from movable friction plate, thereby drive the driven shaft output torque, oil pressure size in the change control oil cylinder is regulated the oil slick thickness between the driving and driven friction plate, can change the rotating speed of active friction plate output and the size of moment of torsion.

The housing of liquid viscosity stepless speed-regulating device is middle split type, on housing, seal by the housing lower end structure by bearings for main driven shaft, and air hole is equipped with in the upper end, main frame and hydraulic station split, the oil that the self-hydraulic system enters in this basic machine flows back to the hydraulic station casing by return opening 15.

Lubricant oil in the system is flow in the friction plate group through the oil duct of driven shaft by lubricated oil distribution casing 12, following requirement will be satisfied in its aperture: lubricant oil be enough to by, between driving and driven friction plate, form the stable oil film of one deck, and this layer oil film can be taken away the heat that produces when maximum sliding wear state when Belt Conveyors starts under the most difficult operating mode.

Control oil channel in the system enters driving shaft from oil distribution casing 4, oil duct by driving shaft enters in the cylinder body of supporting disk 6, promoting piston moves to the right, promoting principal and subordinate's movable friction plate by piston moves vertically, thereby change the oil slick thickness between the driving and driven friction plate, make active friction plate pass to and increase gradually, realize stepless speed regulation, reach the 1:1 transmission at last from the moment of movable friction plate.When driving shaft and driven shaft rotation, the seal ring that is installed on the oil distribution casing throws ring away along with rotating the centrifugal force that produces, and plays seal action.

Claims

1, a kind of belt conveyor lipuid viscosity stepless speed regulator, it has a casing, be provided with the driving shaft and the driven shaft of coaxial setting in the casing, be articulated with the active friction plate group of forming by the multi-disc active friction plate on the driving shaft, be articulated with on the driven shaft by multi-disc from movable friction plate form from the movable friction plate group, active friction plate and arrange at interval vertically from movable friction plate is characterized in that: from the close-by examples to those far off be respectively graphite-based friction plate, copper-base friction plate, paper-base friction wafer from movable friction plate with respect to piston.