JPH01168923A - Operation control of fine spinning frame equipped with rotary ring and device therefor - Google Patents

Abstract

PURPOSE:To eliminate troubles such as end breakage in starting and stopping of spinning, by supporting a rotary ring by plain support system in starting and stopping of fine spinning frame and holding the rotary ring in a stationary state without specifically setting a brake. CONSTITUTION:A bearing housing 2 of static air pressure is fixed to a ring rail 1, a supporting member 3 is held through an O ring 4 inside and rotary ring 7 is rotatably immobilized to the top and inside of a rotor 5 in an integrated way with the rotor 5. In starting, compressed air is not sent to the bearing of static air pressure until number of revolutions of spindle reaches a given number of revolutions and a rotor is made to act in the same manner as that of a supporting member of plain support type. In suspension, at a point of time when number of revolutions of the spindle reaches a given number of revolutions, pressure of compressed air is reduced and the rotor 5 is made to act in the same manner as that of a rotor of plain support type.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a method for controlling the operation of a spinning frame equipped with a rotating ring and its equipment.

(Prior Art) In order to increase the speed of ring spinning machines, it has been proposed to rotatably support the ring relative to the ring rail in order to reduce the frictional resistance acting between the ring and the traveler. A plain support type and an air support type have been proposed as methods for rotatably supporting a ring with respect to a ring rail. As shown in FIG. 6, in the plain support type, a metal support 22 is fitted and fixed to a ring rail 21, and a rotating body 23 is loosely fitted inside the support 22 with a slight clearance. A ring 24 is fitted onto the rotating body 23 so as to be rotatable therewith. Also, the air bearing type was developed in 1986.
As disclosed in Japanese Patent No. 1-176271 and shown in FIG. 7, a housing 25 fixed to the upper surface of the ring rail 21
A porous bearing member 26 made of a sintered metal material is elastically supported within the bearing member 26 via an O-ring 27, and a D-shaped member 28 forming the rotating inner ring of the hydrostatic air bearing is attached to the flange of the bearing member 26. The portions 28a and 28b are loosely fitted with a slight gap between the upper and lower end surfaces of the bearing member 26, facing each other. The ring 24 is fitted to this rotor member 28 so as to be able to rotate integrally with it, and the compressed air supply section 29
The compressed air supplied from the porous bearing member 26 is supplied to the minute gap between the bearing member 26 and the rotor member 28.

(Problem to be solved by the invention) However, in the former plain support type, the support 2
2 and the rotating body 23 are in contact with each other, or when the ring causes irregular vibration during high-speed rotation, the Fjt movement cannot be sufficiently absorbed, and the bearing The frictional torque between the rotating body 22 and the rotating body 23 fluctuates, causing uneven rotation, which may result in problems such as deterioration of the quality of the spun yarn and yarn breakage. or,
There is also the problem that fluff enters the gap between the support body 22 and the rotary body 23 and interferes with the rotation of the ring 24.

On the other hand, in the air bearing type of #li, air is supplied from the porous bearing member 26 between the bearing member 26 and the rotor member 28, so that there is no intrusion of fluff, and the rotational resistance of the ring 24 is is very small, so even when the spindle rotation speed reaches high speeds such as 30,000 to 50,000 rpm, the relative speed between the traveler and the ring does not increase, resulting in the traveler being scattered or burnt out due to increased frictional resistance. It is possible to effectively avoid troubles such as frequent thread breakage caused by failure of the thread. However, the porous bearing member 26 is formed of sintered metal, and the rotor member 2
Since 8 is also made of metal, if the rotor member 28 rotates at high speed while the two are in contact, the holes on the surface of the porous bearing member 26 will be crushed due to seizure. The compressed air pressure supplied to 26 is 4.5k.
It is necessary to raise it to about o/cm2-, and the air is 8! f cost♀
The problem is that there are many.

In addition, since the rotor member 28 is always supported in a floating state, the ring 24 can be moved with a very small spinning force when starting the spinning machine.
The balloon begins to rotate and cannot form a normal balloon, resulting in thread breakage. While the spindle stops relatively quickly when the spinning machine stops, the ring 24 remains in a substantially non-braking state even after the spindle has stopped, and continues to rotate due to inertia. The spun yarn gets wrapped around the bobbin, leading to yarn breakage.

In order to avoid such inconveniences, the ring starts rotating after the spindle rotation speed rises to the set rotation speed when the spinning machine is started, and the ring starts rotating when the spindle rotation speed drops to the set rotation speed when the spinning machine is stopped. It is necessary to stop the inertia rotation. Although a rotary ring braking device has been proposed, conventional braking devices generally have a complicated structure and are disadvantageous in that braking force and braking time tend to vary between each weight.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, in the first invention, an orifice f-s type hydrostatic air bearing that supports the rotating inner ring in the radial direction and the thrust direction is mounted on a ring rail. A rotary ring is attached to the rotary inner ring marked 11α so as to be able to rotate integrally therewith, and compressed air is not supplied to the hydrostatic air bearing until the rotational speed of the spindle reaches a predetermined rotational speed after the machine is started. The operation is performed in a stopped state, and then the supply of compressed air to the hydrostatic air bearing is started, and the rotation speed of the spindle is increased to a predetermined high speed rotation, and the rotation speed of the spindle reaches the predetermined high speed rotation. After that, the compressed air pressure supplied to the hydrostatic air bearing is reduced to a predetermined pressure and operation is continued, and when the spindle rotation speed has decreased to the predetermined rotation speed when the machine is stopped, the hydrostatic air bearing is After the rotational speed of the spindle has decreased to a predetermined value by reducing the compressed air pressure supplied to the traveler, the rotating inner ring is prevented from rotating together with the traveler.

Further, in the second invention, as a device for carrying out the method of the first invention, it is applied to a rotating inner ring of an orifice type hydrostatic air bearing that is mounted on a ring rail and supports the rotating inner ring in the radial direction and the thrust direction. a rotating ring that is integrally rotatably attached; a compressed air supply source that supplies compressed air to the hydrostatic air bearing; A control means for controlling the display time and the like is provided.

(Function) In this invention, when starting up the sticky spinning machine, operation is performed with the supply of compressed air to the hydrostatic air bearing being stopped until the spindle rotational speed reaches a predetermined rotational speed. , the hydrostatic air bearing acts in the same way as a conventional plain bearing type support, and the spun yarn that connects from the draft part to the traveler via the Snell wire forms a normal balloon when the spindle starts rotating, so the spinning starts. It is done smoothly. When the rotational speed of the spindle reaches a predetermined rotational speed, compressed air is supplied to the hydrostatic air bearing to maintain the rotating inner ring in a floating state, and the rotational speed of the spindle reaches a predetermined high-speed rotational speed. The transparency is enhanced. After the rotational speed of the spindle reaches a predetermined high speed rotational speed, the supply compressed air pressure of the hydrostatic air bearing is reduced to a predetermined pressure, and the operation starts at II.
I will be continued. When the machine is stopped, the supply F to the static pressure air bearing is supplied to the static pressure air bearing when the rotational speed of the spindle has decreased to a predetermined rotational speed. In this case, the rotating inner ring again acts in the same way as the plain bearing type, preventing the ring from rotating with the traveler. Therefore, thread breakage is prevented from occurring when the machine is stopped.

(Example 1) A first example embodying the present invention will be described below with reference to FIGS. 1 to 4. As shown in FIG. 1, a housing 2 of a static pressure air bearing is fixed to a ring rail 1, and an orifice type bearing member 3 is elastically supported inside the housing 2 via an O-ring 4. A rotor 5 as a rotating inner ring is loosely fitted inside the bearing member 3, and
Flange members 5a and 5b are provided with screws 3a on both upper and lower end surfaces of the rotor 5 in a state corresponding to both upper and lower ends of the bearing member 3.
, 5b. A rotary ring 7 is fixed to the inner side of the upper part 3 of the rotor 5 so as to be rotatable together with the upper part 5 of the rotor 5. The bearing member 3 is made of a metal material that is highly hard and stable against the humid atmosphere of a spinning factory, such as hardened stainless steel, and is formed of a metal material that has high hardness and is stable against the humid atmosphere of a spinning factory. A large number of holes 3a extending in the horizontal direction are formed. Compressed air supplied from an air supply section 8 provided on the outside of the housing 2 is injected from the hole 3a, thereby bearing the rotor 5 in the radial and thrust directions. Rotor 5 and 7 lunge BfS'N5a,
5b is made of metal, and in order to make the surface facing the bearing member 3 extremely low in friction coefficient and highly wear resistant, each of its surfaces is coated with fluororesin. If the rotor 5 and the flange parts U5a and 5b are entirely made of resin, it is difficult to achieve roundness, but by forming them as described above, the roundness becomes high and the weight balance when acting as a plain support type. It also gets better.

As shown in FIG. 2, compressed air is supplied to each air supply unit 8 via a distribution pipe 11- branched from a compressed air supply pipe 10 connected to a compressor 9 as a compressed air supply source. It is now possible to do so.

A pressure regulating valve 12 is disposed in the middle of the pipe line 10, and the pressure regulating valve 12 is connected to a belt transmission mechanism 13 and a gear transmission mechanism 14.
It is actuated by a motor 15 as a drive device via a motor. The motor 15 receives a detection signal from a rotation speed detector 16 that detects the rotation speed of a spindle (not shown), and is driven and controlled by a control device 17 that issues a drive signal based on the signal. There is. A detection signal from a pressure detector 18 that detects the pressure in the pipe line 10 on the downstream side of the pressure regulating valve 12 is input to the control device 17 . The pressure regulating valve 12, the belt transmission mechanism 13, the gear transmission mechanism 14, the motor 15, the rotation speed detector 16, and the control device 17 constitute a control means.

Next, the operation of the apparatus configured as described above will be explained. The control device 17 controls the compressed air supply pressure to the static air bearing according to the air pressure control program shown in FIG. 3, which is preset in correspondence with the spinning program shown in FIG. 4. When the spinning machine starts operating, the pressure regulating valve 12 is held in a completely closed state, and the operation is started in a state where compressed air is not supplied from the air supply section 8 to the bearing member 3. 5 is supported with the flange member 5a in contact with the bearing member 3, and acts as a brane support type bearing.Therefore, it is ensured that the rotating ring 7 does not rotate during startup and interfere with normal balloon formation. The rotation speed of the spindle is determined by the detection signal from the rotation speed detector 16, and the rotation ring 7 of the plane support type is detected by the traveler 1.
When the control device 1 reaches a predetermined value, for example 1200 Orpm, at least before starting rotation due to frictional resistance with the control device 1
7 issues a forward rotation drive signal to the motor 15.

As a result, the motor 15 is rotated in the normal direction, the pressure regulating valve 12 is opened, and compressed air is supplied from the air supply section 8 to the bearing member 3 via the pipe line 10 and the distribution pipe 11. Compressed air (pressure 4,5 k (1/cm)) supplied to the bearing member 3
is from the hole 3a to the circumferential surface of the rotor 5 (7) and the flange member 5a.
, 5b, and the rotor 5 is supported and held in a floating state with a small gap from the bearing member 3. In this state, as the rotational speed of the spindle increases, the speed of the traveler running on the rotating ring 7 also increases, but since the rotor 5 is supported in a floating state, the resistance to the rotation of the rotating ring 7 is small and the rotating ring 7 By easily rotating with the traveler 19, the relative speed between the traveler 19 and the rotating ring 7 is reduced, and the 1-labeler 19 runs smoothly on the rotating ring 7, preventing the traveler 19 from being scattered or burned out.
Alternatively, thread breakage caused by these obstacles is avoided.

The rotation speed of the spindle is at a predetermined maximum speed (for example, 300
After reaching 00 rpm, spinning is performed while the rotational speed of the spindle is kept constant.

When the rotational speed of the spindle reaches 30000 rpm+, the control device 17 is activated by the detection signal from the rotational speed detector 16.
issues a reverse drive signal to the motor 15 to reduce the compressed air pressure supplied to the hydrostatic air bearing. As a result, the motor 15 is driven in reverse, the pressure regulating valve 12 is operated, and the supplied compressed air pressure is reduced to 1 kg/cm 2 . When that value is reached, the driving of the motor 15 is stopped and the pressure regulating valve 12 is maintained at the same pressure. Retained. When the rotation speed of the spindle is held constant, fluctuations in the centrifugal force of the traveler, thread tension, etc. are reduced, so the static load capacity is lower than the conventional 4.5k.
1,0 k(1
/Cm" does not affect the rotational performance of the rotor 5, so there is no adverse effect on the traveling of the traveler.Also, even if the rotor 5 and the bearing member 3 come into contact, the bearing member 3 is made of sintered metal, unlike conventional devices. Since it is not made of aluminum, there is no risk that 7L 3 a will be blocked due to seizure. Spinning was continued for a predetermined period of time with the compressed air pressure supplied to the static air bearing being maintained at 1.0 k (1/Cl1 l"). After that, the spindle rotation speed decreases from 30,000 rpm due to the operation being stopped, and when the spindle rotation speed decreases to a predetermined rotation speed, for example, 12,000 rpm, the control device 17 again sends a reverse drive signal to the motor 15 based on the detection signal from the rotation speed detector 16. The pressure regulating valve 12 is closed by the reverse drive of the motor 15,
The flange member 5a of the rotor 5 comes into contact with the bearing member 3 before the spindle stops, resulting in a brane support system. Therefore, since the rotating ring 7 stops rotating before the spindle comes to a complete stop when the spindle stops, there is no possibility of thread breakage.

The compressed air pressure supplied to the static air bearing is 1゜0 kg.
The time during which spinning is carried out while the spindle is held at '/clll' is the time until the spindle rotational speed reaches a predetermined high speed rotational speed, that is, the compressed air pressure supplied to the static air bearing is 4.5kg/cn+L. and 10 to 20 times the period of high pressure. The compressed air pressure supplied to the static air bearing is 4.5k.
g/cm” air consumption is 8.5 NI/mi
n, and the supply compressed air pressure is 1.0 ka/cm", it is 1.2 Nl/min. Therefore, the air consumption is significantly reduced compared to when using a conventional hydrostatic air bearing.

i15, the compressed air pressure supplied to the hydrostatic air bearing may be reduced to a predetermined pressure before the rotational speed of the spindle reaches a predetermined maximum rotational speed.

(Example 2) Next, a second embodiment will be described with reference to FIG.

In this embodiment, a solenoid-operated valve is used as the pressure regulating valve 12 that regulates the compressed air pressure supplied to the air supply section 8 of the hydrostatic air bearing, and the pressure regulating valve 12 is directly driven by a control signal from the control device 17. It is designed to be manipulated. Therefore, the configuration of the pressure control means becomes simple. Further, the distribution pipe 11 that guides compressed air to the air supply section 8 of each static pressure air bearing is divided into a plurality of groups, and each group has a pressure regulating valve 1.
2 is provided. With this configuration, even if the number of distribution pipes 11 increases due to the multiple weight distribution of the spinning machine, variations in the responsiveness of pressure changes between each hoop when the pressure is changed by the operation of the pressure regulating valve 12 can be prevented. It becomes less.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, instead of detecting the rotation speed of the spindle, a detection signal of a puncture meter that detects the rotation speed of the front roller is inputted to the control device 17, and the value thereof is input to the control device 17. According to the motor 15
Instead of directly detecting the rotational speed of the spindle and controlling the motor 15 based on the rotational speed to operate the pressure regulating valve 12, the motor 15 is activated in response to the elapsed time from the start of spinning. 15 is programmed and the motor 15 is driven and controlled according to the program to operate the pressure regulating valve 12, or instead of automatically controlling the pressure regulating valve 12 with the control device 17, the operator manually controls the pressure regulating valve 12. or compressor 9
The compression capacity of the body may be controlled. Further, as the structure of the rotor 5, a resin rotor may be used instead of coating the surface of the metal body with resin.

In this case, a weight may be required from the viewpoint of weight balance. Further, since the bearing member 3 is not made of sintered metal but has an orifice type structure, the rotor 5 may be made of a highly wear-resistant metal with a small coefficient of friction.

Furthermore, the supply compressed air pressure is changed to an optimum value depending on the materials of the rotating ring 7, rotor 5, etc. used or the spinning conditions.

Effects of the Invention As detailed above, according to the present invention, the rotating ring is supported as a plain support type when starting and stopping the spinning machine, so that the rotating ring can be kept stationary without providing a special brake Q5. Since the yarn is retained, troubles such as yarn breakage at the start and stop of spinning are eliminated. In addition, after the spindle rotational speed reaches a predetermined rotational speed, the compressed air necessary to reliably maintain the rotating inner ring in a floating state with respect to the hydrostatic air bearing is applied while the spindle speed is further increased to a predetermined high rotational speed. As a result, the rotation speed of the rotating ring is smoothly increased in response to the increase in the traveling speed of the traveler, so the relative speed between the traveler and the rotating ring is reduced, and the speed of the traveler due to increased frictional resistance is reduced. This ensures that scattering, burnout, and thread breakage caused by these obstacles are avoided. Furthermore, after reaching a predetermined spinning speed, the compressed air pressure supplied to the hydrostatic air bearing is maintained at a reduced pressure, significantly reducing air consumption compared to conventional systems. During start-up, the air on the circumferential surface of the bearing member is in an overpressure state, which prevents the intrusion and accumulation of fluff and the like.

[Brief explanation of the drawing]

1 to 4 show a first embodiment embodying the present invention, in which FIG. 1 is a sectional view showing the supporting state of the rotating ring, FIG. 2 is a schematic diagram of the compressed air supply system, and FIG. Figure 3 is a diagram showing the change in the supporting air pressure of the hydrostatic air bearing as the spinning time elapses, Figure 4 is a diagram showing the change in spindle rotation speed during spinning 11.1, and Figure 5 is a diagram showing the change in the spindle rotation speed during spinning 11.1. A schematic diagram of a compressed air supply system according to the second embodiment, FIG. 6 is a sectional view showing a conventional plane bearing type device, and FIG. 7 is a sectional view showing a conventional air bearing type device. Ring rail 1, housing 2, bearing member 3, hole 3a,
A rotor 5 as a rotating inner ring, a rotating ring 7, a conduit 10,
Pressure regulating valve 12 and belt transmission mechanism 1 constituting control means
3. Gear transmission mechanism 14° motor 15. Control device 17, Traveler 19゜Patent applicant: Japan Cotton Industry Technology and Economic Research Institute Representative: Patent attorney On 1) Hironobu Figure 6 Figure 7

Claims (1)

[Claims] 1. An orifice type hydrostatic air bearing that supports the rotating inner ring in the radial direction and the thrust direction is mounted on a ring rail, and a rotating ring is attached to the rotating inner ring so that it can rotate integrally with the rotating inner ring. After starting the machine, the machine is operated with the supply of compressed air to the hydrostatic air bearing stopped until the rotational speed of the spindle reaches a predetermined rotational speed, and then the supply of compressed air to the hydrostatic air bearing is stopped. At the same time as starting, the rotation speed of the spindle is increased to a predetermined high speed rotation speed, and after the rotation speed of the spindle reaches the predetermined high speed rotation speed, the compressed air pressure supplied to the hydrostatic air bearing is reduced to a predetermined pressure. When the spindle rotation speed drops to a predetermined rotation speed when the machine is stopped, the compressed air pressure supplied to the hydrostatic air bearing is reduced, and the spindle rotation speed drops to a predetermined value. The following is a method for controlling the operation of a spinning machine equipped with a rotating ring, which prevents the rotating inner ring from rotating along with the traveler. 2. A rotary ring that is attached to a ring rail and is integrally rotatable with respect to the rotating inner ring of an orifice type hydrostatic air bearing that supports the rotating inner ring in the radial and thrust directions; and the hydrostatic air bearing. a rotating ring having a compressed air supply source that supplies compressed air to the rotary ring; and a control means that controls compressed air pressure supplied from the compressed air supply source to the static air bearing in accordance with spindle rotation speed, spinning time, etc. A spinning machine operation control device equipped with