Hydro-viscous speed regulating device for heavy-load start of belt conveyor

Patent metadata

Field	Value
Publication number	US-10935084-B2
Application number	US-201716095242-A
Country	US
Kind code	B2
Filing date	Dec 12, 2017
Priority date	Apr 27, 2017
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

A hydro-viscous speed regulating device for heavy-load start of a belt conveyor is provided. An input shaft and an output shaft are connected through a spline tube, an inner friction plate set, and an outer friction plate set. The inner and outer friction plate sets are controlled by an inner oil cylinder and an outer oil cylinder respectively. Oil inlet and oil return of the inner oil cylinder and the outer oil cylinder are controlled by an oil inlet valve core and an oil return valve core automatically. During starting process, pressure oil enters into the outer oil cylinder, and pushes the outer friction plate set to be engaged to provide torque required by the output shaft. After the starting process is completed, the revolving speed of the output shaft rises; the oil inlet valve core and the oil return valve core move outward under the effect of a centrifugal force; the pressure oil enters into the inner oil cylinder and pushes the inner friction plate set to be engaged to provide torque required by the output shaft, and at the same time, oil returns to the outer oil cylinder. That is, during starting process, the outer friction plate set provides large torque required for start, and the inner friction plate set provides small torque during normal operation. The present invention achieves automatic switching between different torque required for start and normal operation. Moreover, the present invention has a compact structure, reliable performance, and low costs, and is applicable in a wide range.

First claim

What is claimed is:

1. A hydro-viscous speed regulating device for heavy-load start of a belt conveyor, comprising:
an input shaft;
an inner friction plate set;
an outer friction plate set;
an inner piston;
an outer piston;
an oil inlet valve core;
an oil return valve core; and
an output shaft;
wherein an input shaft end disc is fixedly connected with a circular boss at a middle of the input shaft, and is fixedly connected with an input shaft spline tube;
wherein inner splines of the input shaft spline tube form a flexible connection with an outer friction plate in the inner friction plate set through splines, and outer splines of the input shaft spline tube form a flexible connection with an inner friction plate in the outer friction plate set through splines;
wherein an inner friction plate in the inner friction plate set forms a flexible connection with outer splines of a large-diameter barrel at an end of the output shaft through splines, and an outer friction plate in the outer friction plate set forms a flexible connection with inner splines of an output shaft spline tube through splines;
wherein an outer baffle is fixedly connected with a first end face of the output shaft spline tube;
wherein an output shaft end disc is fixedly connected with a barrel at the end of the output shaft;
wherein the output shaft spline tube is fixedly connected with an output shaft control board;
wherein an end face of the output shaft control board is provided with an outer annular groove in a region near an outer cylindrical surface of the outer shaft control board and an inner annular groove in a region near an inner hole, and the outer piston and the inner piston are mounted in the outer annular groove and the inner annular groove respectively;
wherein a second end face of the output shaft spline tube opposite to the first end face of the output shaft spline tube is provided with a first round hole, an outer piston spring is mounted in the first round hole, and an end face of the outer piston spring acts on an end face of the outer piston;
wherein an end face of the large-diameter barrel at the end of the output shaft is provided with a second round hole near an outer cylindrical surface of the large-diameter barrel, an inner piston spring is mounted in the second round hole, and an end face of the inner piston spring acts on an end face of the inner piston;
wherein the output shaft control board is fixedly connected with the large-diameter barrel at the end of the output shaft;
wherein an inner cylindrical surface of the output shaft control board is provided with a radial oil hole, the outer cylindrical surface of the output shaft control board is provided with a first radial hole at a position parallel to the radial oil hole, and the oil inlet valve core is mounted in the first radial hole;
wherein the inner and outer annular grooves of the output shaft control board are each provided with a lateral oil hole, so that the radial oil hole traverses the first radial hole to be in communication with the inner and outer annular grooves;
wherein an oil inlet valve core spring is mounted at a top of the oil inlet valve core, and a first spring bearer plate is fixedly connected with the output shaft control board to press the oil inlet valve core spring at the top of the oil inlet valve core;
wherein a diameter of the top of the oil inlet valve core is less than a diameter of the first radial hole, so that the radial oil hole is in communication with the outer annular groove of the output shaft control board;
wherein the bottom of the oil inlet valve core seals up the lateral oil hole through which the radial oil hole is communicated with the inner annular groove of the output shaft control board;
wherein the output shaft control board is provided with a second radial hole, which is of the same size as the first radial hole, at a position axially symmetric to the first radial hole about the output shaft, and the oil return valve core is mounted in the second radial hole;
wherein an oil return valve core spring is mounted at the top of the oil return valve core, and a second spring bearer plate is fixedly connected with the output shaft control board to press the oil return valve core spring at the top of the oil return valve core;
wherein the output shaft control board is provided with a first oil return hole of an inner oil cylinder and a second oil return hole of an outer oil cylinder, the first oil return hole of the inner oil cylinder and the second oil return hole of the outer oil cylinder traverse the inner and outer annular grooves as well as the second radial hole;
wherein the oil return valve core is provided with an upper annular groove and a lower annular groove;
wherein the lower annular groove of the oil return valve core enables the inner annular groove of the output shaft control board to be communicated with an outer side of the output shaft control board through the first oil return hole of the inner oil cylinder; and
wherein the upper annular groove of the oil return valve core is slightly lower than the second oil return hole of the outer oil cylinder, and a cylinder at an upper end of the upper annular groove of the oil return valve core prevents the outer annular groove of the output shaft control board from being communicated with the outer side of the output shaft control board through the second oil return hole of the outer oil cylinder.

2. The hydro-viscous speed regulating device for heavy-load start according to claim 1 wherein:
the output shaft is supported by a first bearing and a second bearing;
the first bearing and the second bearing are mounted in a bearing block;
the output shaft is provided with a pressure oil inlet hole that is in communication with the radial oil hole of the output shaft control board; and
the input shaft is provided with a lubricating oil inlet hole of the inner friction plate set and a lubricating oil inlet hole-s of the outer friction plate set.

3. The hydro-viscous speed regulating device for heavy-load start according to claim 1 wherein:
the hydro-viscous speed regulating device further comprises a housing;
the housing is mounted between a first bearing block and a second bearing block; and
the inner friction plate set and components thereof; and the outer friction plate set and components thereof are mounted in the housing.

4. The hydro-viscous speed regulating device for heavy-load start according to claim 1 wherein the input shaft is supported by a first bearing and a second bearing, the first bearing is mounted in a bearing block, and the second bearing is mounted in an inner hole of the output shaft end disc.

Assignees

• Univ China Mining
• Xuzhou Zhirun Mining Equipment Science And Tech Co Ltd

Inventors

• Meng Qingrui
• Jiang Fan
• Tian Zuzhi
• Zhao Chenghao
• Zhang Xin

Classifications

• F16D43/30

  Systems of a plurality of automatic clutches · CPC title

• F16D43/284

  controlled by angular speed · CPC title

• F16D25/12

  Details not specific to one of the before-mentioned types · CPC title

• F16D25/10 Primary

  Clutch systems with a plurality of fluid-actuated clutches (arrangements or mounting of clutches in vehicles B60K17/00) · CPC title

• B65G23/26

  Applications of clutches or brakes · CPC title