Method of torque control operation of the safety clutch of the drive circuit of the machine

 

(57) Abstract:

The inventive when torque control actuation of the safety coupling measure the angles of rotation of the shaft of the working body with structurally uneven resistance, which determines the amendments to this resistance, and the time of actuation of the clutch is determined taking into account torque rotating one of the shafts of the drive circuit of the machine when locked shaft couplings M1and upon release from locking Mxwith regard to gear ratio and efficiency part of the path between the coupling and the shaft of the scroll. 1 C.p. f-crystals, 3 ill.

The invention relates to load technique and can be used for controlling the time of actuation of the safety coupling, working as part of the drive circuits of the machines.

There is a method of torque control actuation of a safety clutch according to the length of the compressed spring acting on the drive (clutch) (see self-Propelled harvester "Niva". The user guide. Rostov-on-don, 1973, S. 114).

However, this method is inaccurate due to the fact that it is not direct, but indirect because of the magnitude of torque is judged only by the length of the compressed and operation of the safety clutch of the drive circuit of the machine, described in and.with. N 1571439 G 01 L 3/00, 14.06.90.

The essence of this method lies in the fact that the trigger point of the coupling is found from the expression Mc=i(M1-Mx), where M1and Mxtorques of rotating one of the shafts of the drive circuit of the machine, which measure, respectively, when locked shaft couplings, and upon release from the stopper; i gear ratio part of the drive path between the coupler and the shaft rotational path; the efficiency of this part of the circuit.

However, when applying this method to control the setting of the safety clutches with machines having operating parts with structurally uneven resistance to rotation, reduces the accuracy of the control due to the fact that structurally uneven resistance to scroll through these bodies affects the values of M1and Mx.

The aim of the invention is to improve the accuracy of torque control operation of the safety clutch for machine having a working body with structurally uneven resistance to spinning at idle.

This goal is achieved by the fact that in the method of torque control operation safety clutch prednamerennoe coupling via the drive circuit of the machine with one of its shafts, on which measure the time scroll M1upon actuation of the clutch and which determine the moment Mwithactuation of the clutch, which further define before or after the above-mentioned rotating when removing the stopper from the shaft for check clutch moment resistance Mxthe spinning of the drive circuit with the same shaft of the scroll, and the time of actuation of the coupling are given i final part of the drive path between the coupler and the shaft of the scroll and h efficiency of this part of the drive circuit, when the torque control actuation of the clutch for a machine having a working body, rotating with structurally uneven resistance to spinning, at idle measure the angles of rotation of the shaft of the working body with structurally uneven resistance, which determines the amendments DMtoand Mpin structurally non-uniform resistance to the replay of this working body when defining respectively M1and Mxgiven to the shaft of the scroll, and the time of actuation of the clutch is found from the expression

Mc=i[(M1-Mto)-(Mx-Mp)]

In order to reduce time to identify amendments Mtousausausa together with this shaft, on which the amendments Mtoand Mp.

As a specific example of the method used to verify the configuration of a safety clutch unloading auger grain combines "Niva".

This harvester has a working body with a structurally unequal resistance to spinning provenancial. The uneven resistance to spinning the working body lies in the construction of polemoniales, since the so-called "comb", its location and mounting on the shaft create it.

Resistance to the spinning shaft of polemoniales changes depending on the angle of rotation of this shaft, and it can be defined escenografia by or based on mass measurements.

Plot moments rotating the shaft of polemoniales depending on the angle of rotation of the shaft shown in Fig.1.

In Fig.2 shows the device adapter on the shaft of the threshing drum combine harvester "field", through which is possible with a torque wrench to scroll through the drive circuits of the combine harvester when the control setting of the safety clutch.

The adapter 1 vypolneknija 3. The adapter 1 is mounted on the shaft 4 threshing drum bolt 5 and nut 6 (on the shaft of the threshing drum has holes to scroll to the left along the harvester side).

Control the setting of the safety coupling as follows.

Scroll with the shaft 4 threshing drum described above device adapter 1 with a torque wrench 3 and is measured by a torque wrench torque scroll Mx. Measured with the protractor the angle of rotation of the shaft of polemoniales, and this angle value on the graph (Fig.1) (and can be done at the table or special chart) determine a correction Mpin structurally non-uniform resistance to the spinning shaft of polemoniales.

Then separat shaft for check clutch unloading auger crowbar and again scroll drive circuits combine with a drum shaft with a torque wrench 3. When the trigger coupling determines the torque resistance to the replay of M1and according to the schedule (Fig.1) determine the amendment Mtoin structurally non-uniform resistance of polemoniales, pre-determined angle of rotation of the shaft of polemoniales.

c=i[(M1-Mto)-(Mx-Mp)]

For example, the test method were obtained the following values: Mx=97 nm; Mp=2 nm;; M1=210 nm; Mto=4 nm.

Its final drive ratio of the drive circuit between the safety clutch unloading auger and the shaft is admittedly known from the technical characteristics of the harvester, and the efficiency of this part of the contour of the technical literature. Work is equal to 1.45.

We substitute these values in the formula, get a torque actuation of a safety clutch.

Mc1,45[(210 4) (97 2)] 161 nm.

In order to reduce time to identify amendments Mtoand Mpon the shaft of the working body (polemoniales) with structurally uneven resistance set the chart, rotating with the shaft.

The chart is made in the form of a circle (Fig.3), for example, from a sheet of cardboard or heavy paper, which is divided marks 1 on the corner conveniently through the 15o. These tags specify 2 values of angles from 0 to 360o. Also include 3, the resistance values of the scroll (in N. M. the shaft of polemoniales at different angles of rotation (through the 15o) shaft provided to the shaft of the air traffic management of the shaft of the drum).

The chart attached at the end of the shaft of polemoniales coaxially with him, based on the position of the knee of the shaft on the label 4.

When determining the torque triggering clutch determined according to the chart, not the angles of rotation of the shaft of polemoniales, and immediately listed in these corners amendments Mtoand Mpnot reading angle values and not using the graph (Fig.1).

1. Method of torque control operation of the safety clutch of the drive circuit of the machine, namely, that separat shaft check for clutch, and then scroll overload coupling via the drive circuit of the machine with one of the shafts on which measure the time scroll M1upon actuation of the clutch, which determine the moment Mwithactuation of the clutch, which further define before or after the above-mentioned rotating when removing the stopper from the shaft for check clutch moment resistance Mxthe spinning of the drive circuit with the same shaft of the scroll, and the time of actuation of the clutch are considering the i-th final part of the drive path between the coupler and the shaft of the scroll and the efficiency of this part of the drive circuit, characterized in that when on uneven resistance to spinning at idle, measure the angles of rotation of the shaft of the working body with structurally uneven resistance, which determines the amendments Mtoand Mpstructurally non-uniform resistance to the replay of this working body, when defining respectively M1and Mxrefer to the shaft of the scroll, and the time of actuation of the clutch is found from the expression

Mwith= i[(M1-Mto)-(Mx-Mp)].

2. The method according to p. 1, characterized in that mounted on the shaft of the working body with structurally uneven resistance chart, rotating with the shaft, on which the amendments Mtoand Mp.

 

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