GB2181172A - Driven equipment capable of transmitting loads - Google Patents
Driven equipment capable of transmitting loads Download PDFInfo
- Publication number
- GB2181172A GB2181172A GB08524519A GB8524519A GB2181172A GB 2181172 A GB2181172 A GB 2181172A GB 08524519 A GB08524519 A GB 08524519A GB 8524519 A GB8524519 A GB 8524519A GB 2181172 A GB2181172 A GB 2181172A
- Authority
- GB
- United Kingdom
- Prior art keywords
- driven
- drive
- gearing
- mining machine
- sensor means
- 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.)
- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C31/00—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam
Abstract
Driven equipment comprises two sets of gearing (2,3) for driving two operational functions, respectively, e.g., a rotary cutter head (5) and a haulage arrangement provided on a mining machine (1,2). Sensor means (9,10,14) are provided for sensing load parameters including the load parameter associated with at least one of the two sets of driven gearing, the sensor means deriving signal means indicative of the sensed load parameters to determine what proportion of an available supply load parameter is taken by at least one of the two sets of driven gearing. <IMAGE>
Description
SPECIFICATION
Driven equipment capable of transmitting loads
This invention relates two driven equipmentcomprising at least two drive arrangements capable oftransmitting a plurality of loads, at least one ofthe driven arrangements including a set of driven gearing.
In particular, although not exclusively, the present invention relates to underground mining machines comprising at least two drive arrangements for driving two operational functions, respectively.
Two fundamental problems that are frequently en- countered in the original design and design appraisal workon underground mining machines are associa- ted with the lack of definitive information on the pattern and magnitude oftransmission loadingsto which machines are subjected in service. They are, firstly, the actual level of dynamic and shock loads in all underground powertransmissions, and secondly, the proportion oftotal availablemotortorquethatis transmitted through each of two or more drives that share the same prime mover.
Increasing emphasis on reliability has highlighted the necessity for more accurate assessment of design criteria.
At present, accurate measurement of load/torque parameters may be acquired by the use of torque transducers with slip ring devices which are essentially laboratory instruments. Furthermore, the li mi- tations of underground recording equipment in the past prohibited the acquisition of useful data. Measurement of electrical power input to an underground mining machine is presently restricted to the total electrical power to the motor, the power shared and transmitted to each gear train can only be estimated as an arbitrary proportion.
It is one object of the present invention to provide improved driven equipment comprising simple, ac curateandreliablemeansformonitoring load parameters transmitted bytheequipment.
According to the present invention driven equipment comprises two drive arrangements at least one of which includes a set of driven gearing, the two drive arrangements being arranged to drive two operational functions, respectively, and sensor means for sensing load parameters including the load parameter associated with said at least one set of driven gearing and for deriving signal means indicative of the sensed load parameters to determine what proportion of an available supply load parameteristaken by at least one of the two drive arrangements.
Conveniently, the sensor means comprises means for sensing the load parameters associated with both the drive arrangements.
Conveniently, the driven equipment comprises common drive meansfordriving thetwo drive arrangements, the sensor means sensing power supplied to the drive means.
The present invention also provides a mining machine comprising two driven arrangements at least one of which includes a set of driven gearing, the two drive arrangements being arranged to drive two operational functions, respectively, and sensor means for sensing load parameters including the
load parameter associated with said at least one set
of driven gearing and for deriving signal means indi cative of the sensed load parameters to determine what proportion of an available supply load parameter is taken by at least one of the two drive arrangements.
Conveniently, the sensor means comprises means for sensing the load parameters associated with both the drive arrangements.
Conveniently, the mining machine comprises common drive means for driving the drive arrange
ments, the sensor means sensing power supplied to the drive means.
With mining machines comprising two driven rotary cutter heads each driven by a drive arrangement including a set ofdriven gearing,thetwo sets of driven gearing may be associated with the cutter heads, respectively, the sensor means sensing the load parameters associated with the two cutter heads.
With mining machines comprising a driven haulage and at least one driven rotary cutter head the two sets of driven gearing may be associated with the driven haulage and cutter head, respectively, the sensormeanssensing the load parameterassociated with at least one set ofthe driven gearing.
Conveniently, the sensor means senses the power supplied to the drive means.
Preferably, the sensor means comprises strain gauge means sensing a load parameter associated with a gear carrying idler pin constituting a part of one set ofdriven gearing.
Preferably, the strain gauge means comprises a
Wheatstone bridge arrangement.
Byway of example,two embodiments of the pre- sent invention will be described with reference to the accompanying drawings, in which Figure 1 is an incomplete diagrammatic perspect iveviewofone end of a mining machine provided with driven equipment constructed in accordance with one embodiment of the present invention,the
Figure including an enlarged side scrap view of a detail ofthe mining machine; Figure2 is a block electrical circuit diagram of a part of sensor means provided by the driven equip- ment of Figure 1; and
Figure 3 is an incomplete diagrammatic perspect ive view of a mining machine provided with driven equipment constructed in accordance with a second embodiment of the present invention.
Figure 1 shows a cutting end of a shearertype mining machine which in operation traverses repeatedly to and fro along a longwall coal face winning coal in a well known manner. The machine comprises a body including a drive motor 1 and a cutting end gearbox 2 rigidly connected to the drive motor. A ranging arm or boom 3 is mounted on the cutting end gearbox for pivotal movement about a horizontal axis 4 such that the cutting horizon of the rotary cutter head 5 carried by the arm 3 can be vertically adjusted. Pivotal movement ofthe arm is controlled by a double acting hydraulic ram (not shown).
The drive arrangementforthe rotary cutter head comprises a set of gearing extending from the drive motor 1, via the cutting end gearbox 2 and along the arm 3 to the cutter head which, thereby, is rotated about an axis 6. The gearing along the arm 3 includes a gearwheel 7 (see scrap view in Figure 1) mounted on an idler pin 8 which is provided with two pairs of strain gauge devices 9 and 10 arranged to sense the load parameter on the set of gearing when the cutter head is being rotated and winning coal. The strain gauge devices are mounted substantially in planes parallel to the load forcesxand yonthe gearteeth of the gearwheel 7 and to the reaction supportforcesA and B exerted on the pin 8 by its support (notshown).
The strain gauge devices are mounted on annular grooves 11 and 12 formed in the idler pin.
Thefunction of the strain gauge deviceswill be explained later in the specification with particular referenceto Figure 2.
The mining machine also comprises a haulage (not shown) drivably connected to the drive motor 1 via a drive arrangement including a second set of driven gearing (not shown). The haulage comprises a driven sprocket arranged to drivably engage a chain or a haulage rack providing a series of abutments.
The drive motor lisa common motorfor driving the drive arrangementsforthe cutter head and forthe haulage. Electrical power is supplied to the drive motor 1 via a cable 13 which is provided with sensor means 14forsensing the available powersuppliedto the machine during its coal winning operations.
Figure 2 is a block electrical circuit diagram ofthe aforementioned sensor means comprising the strain gauge devices 9 and 10 mounted on the idler pin 8.
The strain gauge devices constituteWheatstone bridge arrangements which is fed with a power supplyfrom signal source and conditioning apparatus 15 mounted on the body ofthe machine, the power supply being fed to the Wheatstone bridge arrangementcables 16 and 17. Signals arising from theWheatstone bridge arrangement during coal winning operations and due to load parameters exerted on the pin and sensed by the strain gauge device are fed backtothe apparatus 1 5via cables 18 and 19.
The conditioned received signals are fed from the apparatus 15to monitoring equipment 20 via a cable 21.
From the signal means received bythe monitoring equipment 15 a processing system (not shown) is able to determine the load parameter sensed by the sensor means 9, 10 and associated with the set of gearing transmitting the cutter head drive and by comparing the determined load parameter with the total available load parameter determined by the processing system from the signal means derived by the sensor means 14 sensing the available power supplied to the common drivemotorl,thepropor- tion ofthe available supply load parametertaken by the cutter head drive gearing is determined. The difference between the total available load parameter and thattaken by the cutter head drive is the load parameter taken by the machine's haulage drive.
Figure 3 shows details of a second embodiment of the present invention in which the load parameters associated with the sets of gearing to both cutter head drives of a double ended winning machine 100 is sensed. As seen in Figure 3 the machine is provided with a rotary cutter head 105 and 105' carried on ranging arms 103,103' provided on end ofthe machine's body respectively.In the embodiment il lustrated in Figure 3 an idler pin 108. 108' is provided with sensor means comprising Wheatstone bridge arrangements (notshown in Figure3butsimilarto those arrangements disclosed with reference to the first described embodiment). Signal means from the
Wheatstone bridge arrangements provided on pins 108,108' arefed along cables 116,1 16' to signal source and conditioning apparatus 115 and then on to monitoring equipment 120 via cable 121. A processing system (not shown) compares the two received signal means which are indicative of the sensed load parameters transmitted by the two sets of gearing to the two cutter heads and determines the proportion ofthe load parameters taken by each cutter head drive.
lfthehaulageofthemachine 100 is driven bya drive motor common to the two cutter head drives then in some embodiments additional sensor means might be provided to sense the total available power supplied to the machine drive motor. This sensed load parameter could then be used to determine the load parametertaken by the haulage drive gearing.
The present invention has the particulatadvantage that the sensor mounted on the pin senses the actual mechanical load in the transmission which is inclusive of all dynamic and inertia effects.
Claims (13)
1. Driven equipment comprising two drivearrangements at least one of which includes a set of driven gea ring, the two drive arrangements being arranged to drive two operational functions, respectively, and sensor means for sensing load parameters including the load parameter associated with said at least one set of driven gearing and for deriving signal means indicative of the sensed load parameters to determine what proportion of an available supply load parameter is taken by at least one of the two drive arrangements.
2. Driven equipment as claimed in claim 1,in which the sensor means comprises meansforsensing the load parameters associated with both the drive arrangements.
3. Driven equipment as claimed in claim 1 or2, in which the driven equipment comprises common drive means for driving the two drive arrangements, the sensor means sensing power supplied to the drive means.
4. A mining machine comprising two drive arrangements including at least one set of driven gearing, the two drive arrangements being arranged to drive two operational functions, respectively, and sensor means for sensing load parameters including the load parameter associated with said at least one set of driven gearing and for deriving signal means indicative of the sensed load parameters to determine what proportion of an available supply load parameter is taken by at least one ofthe two drive arrangements.
5. Amining machine as claimed in claim 4, in which the sensor means comprises means for sensing the load parameters associated with both the drive arrangements.
6. A mining machine as claimed in claim 4 or 5, in which the mining machine comprises common drive means for driving the two drive arrangements, the sensor means sensing power supplied to the drive means.
7. A mining machine as claimed in claim 4, comprising two driven rotary cutter heads each driven by a drive arrangement including a set of driven gearing, the two sets of driven gearing being associated with the cutter heads, respectively, the sensor means senses the load parameters associated with the two cutter heads.
8. A mining machine as claimed in claim 4, comprising a driven haulage and at least one driven rotary cutter head, each driven by a drive arrangement including a set of driven gearing, the two sets of driven gearing being associated with the driven haulage and cutter head, respectively, the sensor means senses the load parameter associated with the at least one set ofthe driven gearing.
9. A mining machine as claimed in any one ofthe preceding claims 6 to 8, in which the sensor means senses the power supplied to the drive means.
10. A mining machine as claimed in any one of the preceding claims 6to 9 in whichthesensor means comprises strain gauge means sensing a load parameter associated with a gear carrying idler pin constituting a part of one set of driven gearing.
11. A mining machine as claimed in claim 10, in which the strain gauge means comprises a Wheatstone bridge arrangement.
12. Driven equipmentsubstantiallyas described herein and substantially as shown in Figures 1 and 2 or Figure 3 ofthe accompanying drawings.
13. A mining machine substantially as described herein and substantially as shown in Figures 1 and 2 or Figure 3 ofthe accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08524519A GB2181172A (en) | 1985-10-04 | 1985-10-04 | Driven equipment capable of transmitting loads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08524519A GB2181172A (en) | 1985-10-04 | 1985-10-04 | Driven equipment capable of transmitting loads |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8524519D0 GB8524519D0 (en) | 1985-11-06 |
| GB2181172A true GB2181172A (en) | 1987-04-15 |
Family
ID=10586190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08524519A Withdrawn GB2181172A (en) | 1985-10-04 | 1985-10-04 | Driven equipment capable of transmitting loads |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2181172A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1587294A (en) * | 1977-06-02 | 1981-04-01 | Dresser Europe Sa | Mining machine haulage transmission |
| GB1592354A (en) * | 1976-11-11 | 1981-07-08 | Anderson Strathclyde Ltd | Mineral mining machine cutter driving mechanism having a load sensing device to regulate the haulage speed of the machine when the cutter driving mechanism is overloaded |
-
1985
- 1985-10-04 GB GB08524519A patent/GB2181172A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1592354A (en) * | 1976-11-11 | 1981-07-08 | Anderson Strathclyde Ltd | Mineral mining machine cutter driving mechanism having a load sensing device to regulate the haulage speed of the machine when the cutter driving mechanism is overloaded |
| GB1587294A (en) * | 1977-06-02 | 1981-04-01 | Dresser Europe Sa | Mining machine haulage transmission |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8524519D0 (en) | 1985-11-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |