SU1333722A1 - Method and apparatus for monitoring operation of cotton-processing machine - Google Patents

Abstract

The invention relates to textile industry, to equipment for processing raw cotton, such as roller gins, linters. The aim of the invention is the expansion of technological capabilities by ensuring the control of the state of replaceable working bodies, which is defined as the ratio of the load on the drive of the working bodies to the rotational speed of the feed rollers in a steady state. The device contains a sensor 1 load on the drive of the working OP. gan and sensor 6 of rotation frequency of pi-, thawing rollers, divider 7, delay unit 8, null-organ 9, switch 2, adder 3, transmitter 4 of the working life of replaceable operating elements, indicator 5 and block 10 cs. The transition of the machine to the established mode is determined by the practical absence of a change in the output signal of the divider 7, which arrives with a delay through block 8 at the first input and without delay at the second input of the zero organ 9. Record the value of the output signal of the algebraic adder, which characterizes the degree of approximation of the working bodies by the time they need to be changed, the memory block 10 is carried out when a signal is sent from the zero-organ 9 to open the switch 2. 2 cff-ly, 1 sludge. (L CA CO 00 e N5

Description

The invention relates to textile industry, to equipment for the processing of raw cotton, for example, cash gins, linters.

The aim of the invention is the expansion of technological capabilities. by ensuring control of the state of replaceable working bodies.

The drawing shows a block diagram of a device that implements the method.

The device dp for carrying out the proposed method of controlling the work of the cotton processing machine comprises a load sensor 1 on the drive of the working parts of the cotton processing machine, a switch 2, the input of which is connected to the output of the adder 3, a setting device 4 of the service life of replaceable working bodies of the machine connected to the First input of the adder 3 indicator 5, the sensor 6 of the frequency of rotation of the supply rollers, the divider 7, the block 8 time delay. The null organ 9 and the memory block 10 connected with its output to the indicator 5, and the input with the output of the switch 2, the control input of which is connected to the output of the null organ 9, the first input of the zero organ 9 is connected to the output of the divider 1 a the second one - with the same output, but through the time delay unit 8; in addition, the output of the divider 7 is connected to the second input of the adder 3, and the inputs respectively to the load sensor 1 on the machine drive and to the 6 Frequency of rotation of the feed rollers.

The method of controlling the operation of the cotton processing machine is carried out as follows.

All the main cotton processing machines (cleaning, ginning, lining and fiber cleaning) carry out mechanical, separation processes and have quite often interchangeable working bodies (in gins and linters, for example, the saw-cylinder package is used). The frequency of changing the working bodies depends on the type of machine and the type of cotton material being processed. At the same time, if the working bodies are changed before their permissible wear, the processing speed and product quality will increase, but equipment downtime will increase due to an increase in the number of unproductive organ replacement and machine changeover, as well as the consumption of materials used for manufacturing or repair. replaceable working bodies. When changing the working bodies after their permissible wear, the processing speed decreases and the quality of the output material decreases. Thus, the efficiency of the work of the cotton copier () of the attacking machine and the quality of the output of the material depend on the control of the state of the replaceable working bodies of the machine and the timely detection of wear.

5 to a state acceptable for the process, processing and grade of cotton material to be processed.

Their bodies, which are directly connected to the cotton entering the processing, are closely related to the quality and quantity of the cotton produced: the result of this.

5 Therefore, if the cotton processing machine is presented as a dynamic link, then the state of shifts is. working bodies can be represented as a transfer function

0 of this link. Moreover, meaning: if this function does not drift in time: and in accordance with the process of wear of the working bodies

Replaceable state

rather, the state of their slave (

0 interactions

is output ratio

parameter

35 of the dynamic link to its input parameter in the established quasistationary mode, i.e. stationary for small (relative to the wear cycle of working bodies) time intervals. In this case, the state of the interchangeable working parts of the machine as a transfer function of the dynamic link is expressed by the ratio of the load on the main drive of the cotton recycling machine.

five

UH tires

P where P

to the frequency of rotation of the feed

and „c.

 -Ul ..

and,

ne

I

ilHE

(one)

0

five

and „ne

expressed by a voltage directly proportional to the numerical value of the ratio: I U and; expressed as a voltage directly proportional to the load current on the drive of the machine; expressed by a voltage proportional to the puffs of the feed rollers feeding the cotton to the processing machine.

Direct to the frequency

The value of the state of the working bodies P must be determined in the established mode over a short time interval, commensurate with the transient perturbation time for this type of machine, but incommensurately small for the time interval during which the full wear of the working bodies occurs. The steady state is needed in order to eliminate errors associated with deviations in the material balance of the cotton processing process caused by random disturbances both at the entrance to the process and the local change of cotton density or moisture) products due to compaction or loosening cotton in the working area of the machine.

The Permissible value of the degree of wear of replaceable working bodies of the machine P,

/

set by unit 4 is determined experimentally for each type of machine and grade of cotton being processed. For this, when processing cotton of a certain grade, at fairly frequent intervals, the quality of the product obtained is checked by known methods and, with a gradual decrease as the working bodies wear out, a point in time is revealed when it reaches the maximum allowable value for the cotton. At this moment, the numerical value of the degree of wear allowed for the given grade is determined by measuring U ,, and Una and calculating the ratio of Uf to Opv. The magnitude of the voltage, proportional to P, is set by the setting device 4 as the degree of wear of the working bodies during the processing of a certain sort of cotton. The time constant C, the value of which is calculated by the time delay unit 8, is determined once for a certain type of cotton harvesting machine. To do this, a lump of cotton tinted with any dye is fed to the input of a machine operating in normal mode and time is recorded, then the time it takes for tinted cotton to pass during processing is measured upon leaving the tinted product. The resulting numeric time is the estimated transport time for this type of vehicle.

33722

tires as well as basic and constant

parameter block 8 delay time.

Automatic control of the condition

 Replaceable working bodies of the machine in statics are carried out by continuous measurement in steady state by sensors 1 and 6 of the load on the drive of the machine and the frequency of rotation of the feed faces and calculation in divider 7 of their ratio n (1) i.e. The slow drift in time of the transfer function of the processing machine is continuously determined, and its drift of 15 MW is proportional to the change in the state of the working bodies as they wear out during processing (for example, dull saw teeth in cylinder blades and 2 Q pax lint). The value of the ratio P determines the state of the working bodies at each time point, and by comparing its value in the adder 3 with the allowance for the given process and grade

25 of the material being processed, the value specified by the resource setter 4, by their difference indicated by the indicator 5, automatically controls the availability of the resource Pp P - P,. When the current value is equal to 30. P and a given P in the adder 3, a signal is generated that terminates the life of the machine's working parts, i.e.

35

RR P - PJ Oh,

In this case, warning indicator is turned on in indicator b.

Dp ensure the correct determination of the current state of the replaceable working bodies of the working machine from

4Q, the wearing of n (1) is calculated when setting the values of the parameters and from the control, automatically using switch 2 excludes time intervals in which

45 there is a start, stop or transition process associated with the transition to a new mode or regulation by disturbances. The established mode of operation of the machine is determined from the condition

cQ is the equality of the current value of the state P to the previous value of its P, measured previously for the time T, equal to the transit time of the processed material in the machine from the entrance to the exit of it, i.e. Р Р. The time S. is sufficient to establish the fact of the steady state operation of the machine, but does not affect the change in P, since it is incommensurably small (1-20 s)

in comparison with the period of time required for wear of the working bodies (wear of saws for gin and linters occurs in a time of 50 to 300 hours of continuous machine operation). The existence of equality, P P is determined by using a zero-body 9 and a time delay block 8, dot: what the value of the current state of the working bodies P from the output of the divider 7 calculations and through block 8 simultaneously feeds into the input of the zero-body 9 time delay value, measured and previously calculated at time T, the state of the working bodies. With the existence of equality P, P-null-organ 9 generates a control signal at the output, which, including

The switch 2 permits the constant load relation to the drive of the workers in the memory block 10 from the adder 8 organs as the rotation of the feed rollers in the established mode of operation of the cotton processing machine.

RR. With

thirty

3S

value of a resource of R. of working bodies of the car. An indicator 5 is connected to the memory block 10, showing the contents of the memory block at this time, i.e. the current value of the violation of the equality Р Р-, (i.e. P RL) then indicates that the device goes into a dynamic mode of operation (i.e., when starting, reconfiguring, stopping or automatically adjusting by random perturbation), zero - organ 9 generates a signal that switches off memory 10 from the adder 3 using switch 2. In this case, indicator 5 shows the current value recorded last in memory 10 until the current mode failed, until the transition passes process and not again. the steady state is established, i.e. until the equality P of the P is restored. Each time this equality is restored again, switch 2 automatically connects memory block 10 to the output of adder 3 in order to regularly rewrite the current change in the life of the working bodies P. When the adder reaches 3 values of the resource P. O- indicator 5 will generate a warning signal about

2. A device for counter work of the cotton processing machine, containing a load sensor on the working device, an adder connected by an output to the input of the switch, and an indicator that — in order to expand these possibilities by monitoring the status of interchangeable bodies, it is equipped with sensors rotational hub feed shaft

those nologicheskie-sintering working iKOM watch, de40

unit, time delay unit, zero-organ, unit for life of replaceable organs and memory); and the load sensor on the drive of working bodies and the frequency of rotation of the feed rollers are connected to the corresponding inputs of the divider, the output of which is connected to the flea input of the time delay and to the first inputs of the zero-organ and the adder, the second output connected to the unit of the service life of the interchangeable organs, with the etra the zero-organ is connected to the second input with the output of the time delay unit, and the output out through which a memory unit connected to indikatoru.I,

50

the end of a given task | som 4 resource work interchangeable working | with organs

cotton processing.

Claims (2)

Formula images e e n i . 1. A method of controlling the operation of a cotton processing machine, which consists in controlling the load on the drive of the working bodies, which is to ensure that, in order to expand technological capabilities by providing a counterweight of replaceable working bodies , additionally, controlling the i1-: intensity of the fiber supply to the hopper processing machine, and the state of the replaceable working bodies is defined as 2. A device for counter work of the cotton processing machine, containing a load sensor on the device, and a drive of working bodies, an adder, connected by an output to the input of the switch and an indicator torus, which is different, in order to expand those possibilities by both controlling the states of interchangeable organs, it is equipped with a rotation sensor for the shaft supply the topics of nologic-sintering of working iKOM watch, unit, time delay unit, zero-organ, unit for life of replaceable organs and memory); and the load sensor on the drive of working bodies and the frequency of rotation of the feed rollers are connected to the corresponding inputs of the divider, the output of which is connected to the flea input of the time delay and to the first inputs of the zero-organ and the adder, the second output connected to the unit of the life of the interchangeable organs, with the etra the zero-organ is connected by the second input to the output of the time delay unit, and the output to the control inputwhich is connected to the indicator through the memory block.