EP4245708A1 - Apparatus for lubricating a running yarn - Google Patents

Abstract

The present invention relates to a device for oiling a running yarn (1) and has a control (17) and a housing (2). An oil connection (3), a metering pump (4) and a yarn guide device (6) with an oil transfer element (7) mounted in the yarn guide device (6) are provided in the housing (2), the oil transfer element (7) passing through an oil delivery channel via the dosing pump (4) is connected to the oil connection (3). A closure element (11) and a flow sensor (13) are provided in the oil delivery channel, the oil delivery channel having a first section (8) from the oil connection (3) to the metering pump (4), a second section (9) from the metering pump (4) to the closure element (11) and a third section (10) from the closure element (11) to the oil transfer element (7) and wherein the flow sensor (13) is provided in the second section (9).

Description

The present invention relates to a device for oiling a running yarn with a housing, with a metering pump arranged in the housing and with a yarn guide device with an oil transfer element mounted in the yarn guide device, the oil transfer element being connected to the oil connection through an oil delivery channel via the metering pump.

Devices of this type are known from the prior art, for example disclosed in CN 208 545 538 U a device for oiling a running yarn with a metering pump which is designed as a gear pump and is driven by an electric motor. The oil is transferred via a supply line from the metering pump to a sponge inserted in a yarn guide groove, through which the oil is applied to the yarn. In addition, a heater is provided to warm the oil. Next is from the CN 209 636 478 U the use of a heating plate to heat the oil is known. A disadvantage of the known designs is that due to the pressure conditions in the oil distribution, an overflow of oil from the metering pump to the yarn guide device occurs when the device is at a standstill. This leads to contamination of the device and must be removed before a restart in order to avoid contamination of the yarn. The CN 207 452 340 U tried to remedy this disadvantage by a device for oiling a running yarn with an inserted yarn guide device which has a protective cover. This can prevent oil from escaping from the device, but it does not prevent oil from running into the yarn guide device. Another disadvantage is that the amount of oil absorbed by the yarn is determined by empirical adjustments of the oil pump and cannot be adapted to circumstances such as slowed yarn running.

The object of the present invention is therefore to propose a device for oiling a running yarn or thread, which prevents unwanted oil leakage and enables precise metering of the amount of oil.

The task is solved by a device and a method with the features of the independent patent claim.

What is proposed is a device for oiling a running yarn with a control and with a housing and with an oil connection provided in the housing and with a metering pump arranged in the housing and with a yarn guide device with an oil transfer element mounted in the yarn guide device, the oil transfer element passing through an oil delivery channel via the Dosing pump is connected to the oil connection. A closure element and a flow sensor are provided in the oil delivery channel. The oil delivery channel has a first section from the oil connection to the metering pump, a second section from the metering pump to the closure element and a third section from the closure element to the oil transfer element, the flow sensor being provided in the second section. The device is supplied with oil from a storage container which is connected to the oil connection via a line. A hose connection has proven to be useful, making it easy to change the type of oil. A cleaning agent for maintenance and cleaning of the device can also be introduced via the oil connection.

The yarn is usually wetted with an oil quantity of 0.4 ml/kilometer to 10 ml/kilometer. The amount of oil depends on the type of yarn and the intended use of the yarn. When using the device in common winding machines or spinning systems, taking the yarn speeds into account, the metering pump output is between 0.1 ml/min and 30 ml/min. The metering pump delivers the oil in the required amount to the oil transfer element which is embedded in the yarn guide device. The yarn running in the yarn guide device comes into contact with the oil transfer element, which results in a transfer of oil to the yarn. The oil delivery channel built into the housing from the oil connection to the yarn transfer element is designed in three sections. The individual sections can be designed as bores or channels in the housing or as pipes. Bores and channels, which Completely surrounded by the housing are preferable to screwed or otherwise connected pipes, as there is no possibility of leakage.

The first section of the oil delivery channel leads from the oil connection to the metering pump. The oil connection is advantageously designed as an internal thread or a commercially available coupling for hose lines. The metering pump can be integrated into the housing of the device, so that a housing of the metering pump is an integral part of the housing of the device. The second section of the oil delivery channel leads from the metering pump to the closure element. The flow sensor is installed in this section. The flow sensor detects the amount of oil delivered by the metering pump to the oil transfer element. The design of the flow sensor is, for example, an ultrasonic or Coriolis mass flow meter. A calorimetric flow meter has proven to be the preferred version, as it can be used to measure even the smallest amounts of oil pumped. With the help of the flow sensor, it is possible to evenly wet the yarn with oil, and the control can also react to a change in yarn speed with a corresponding reduction in the oil supply. The closure element following the second section has the advantage that no oil can reach the oil transfer element if, for example, no yarn is guided through the yarn guide device or the yarn does not need to be oiled. The closure element prevents oil from dripping through the oil transfer element when it is at a standstill and contaminating the yarn guide device or its surroundings. In addition, cleaning of the yarn guide device or the oil transfer element before restarting the device can be avoided.

The third section of the oil delivery channel leads from the closure element to the oil transfer element. The oil transfer element is embedded in the yarn guide device and is designed, for example, as a sponge or other type of porous element. The oil delivered to the oil transfer element through the third section of the oil delivery channel penetrates the oil transfer element and is passed through the Touching the oil transfer element with the yarn running past it transfers it to the yarn.

The metering pump is advantageously designed as a gear pump with a controlled electric motor. Gear pumps are known from the prior art and have proven themselves for pumping very small quantities under low pressure. The controlled electric motor allows the control system to easily access the dosage of a delivery quantity. In the embodiment, the regulated electric motor can be designed, for example, as a servo motor or as a motor with frequency control.

Preferably, the closure element is a shut-off valve with an electromagnetic drive. Shut-off valves have the advantage that they are of simple construction and can be installed in the housing of the device in order to completely close the oil delivery channel. The electromagnetic drive can be used to switch the shut-off valve in such a way that it is closed in the de-energized state. This means that when the system is at a standstill, there is no energy requirement to keep the shut-off valve closed and the shut-off valve closes automatically even in the event of a power failure.

It is advantageous if the third section of the oil delivery channel is at least partially designed as a heating coil. In the third section, the oil is passed through a heating coil, which can be designed as a single turn or as multiple turns in the form of a spiral. In the heating coil, the oil is heated to a higher temperature than when stored. A certain amount of heating energy is introduced into the heating coil. The amount of energy is kept constant by the control system, which is tailored to the type of oil used and the yarn to be oiled. The heating coil is preferably provided with a temperature difference measurement. An input temperature measurement is provided at the entrance of the heating coil and an output temperature measurement is provided at the output of the heating coil. With the help of the measured temperatures, the supply of heating energy to the heating coil is regulated. This has the advantage that it is independent of the operating load of the device An ideal viscosity of the oil can always be set. This leads to an even and consistent wetting of the yarn over the entire length of the yarn.

Preferably, the yarn guide device is attached to an outside of the housing and open to the surroundings of the device. Attaching the yarn guide device to an outside of the housing leads to easy access and thus easy threading of the yarn into the yarn guide device. The yarn guiding device can consist of several components; for example, the yarn can be guided by separate guide plates at the upper and lower ends of the housing. Such guide plates are characterized by a guide slot which has a side opening, which means that the yarn, once threaded, cannot jump out of the guide on its own. The two guide plates can be connected to a middle part of the yarn guide device which is arranged between them and contains a guide groove.

For easy replacement for maintenance and repair purposes, it is advantageous if the yarn guide device is held in the housing so that it can be moved linearly. This means that even if the yarn guide device is replaced, for example due to a change in the material of the yarn, easy disassembly can be carried out. To hold the yarn guide device in the housing, a longitudinal groove corresponding to the yarn guide device is provided. The yarn guide device can be inserted within this longitudinal groove and held by pins, screws or clips. In order to ensure precise guidance of the yarn, the yarn guiding device is preferably connected to the housing via a dovetail guide. This makes it possible to achieve a precise alignment of the yarn guide to an exit of the oil from the third section of the oil delivery channel. Alternatively, a clamping guide is also conceivable, in which the yarn guide device is held in a defined position in the housing, for example by elastic plastic elements. An oil transfer element is embedded in the yarn guide device, which is usually made as a sponge or made of a porous material, so that the oil passes through the oil transfer element the yarn can reach. The oil transfer element is advantageously detachably connected to the yarn guide device. The oil transfer element is a wearing part and must therefore be replaced at specified intervals. Due to the detachable connection between the oil transfer element and the yarn guide device, only the oil transfer element can be replaced and the yarn guide device remains unaffected.

The control is advantageously attached to the housing or integrated into the housing. The control or the housing is preferably provided with a visualization for displaying operating states, measured values such as temperature, flow, consumption, etc. and a keypad for operating the device and entering control parameters. Direct visualization can be implemented with a touchscreen, whereby the keypad can be integrated into this touchscreen and does not have to be present separately. However, simple visualization using simple colored light displays and a separate keypad can also be provided. By designing the control in this way, it is possible to operate the device for oiling a running yarn as an autonomous element that is independent of a higher-level control.

The data of the measurements and operating states of the device can also be transmitted to a higher-level controller via wired or wireless communication. A corresponding interface between the control of the device and a higher-level control makes it possible to remotely control the device for oiling a running yarn.

Preferably, the visualization provides a display of at least one of the following information: an amount of oil; an oil temperature; oil consumption; an operating state; an operating mode; an operating period; an operating manual. Operating instructions can, for example, contain information about necessary maintenance or the replacement of wearing parts. Static values can also be output via the visualization.

Furthermore, a method for oiling a running yarn is proposed using a device according to the previous description. The device has a control and a housing and an oil connection provided in the housing and a metering pump arranged in the housing with a drive motor and a yarn guide device with an oil transfer element mounted in the yarn guide device, the oil transfer element being connected to the oil connection through an oil delivery channel via the metering pump. Oil is fed from an oil connection to the metering pump via a first section of the oil delivery channel. The oil is then pumped via a second section of the oil delivery channel through a flow sensor to a closure element and via a third section of the oil delivery channel to the yarn guide device, with the control closing the oil delivery channel by actuating the closure element when the metering pump is at a standstill. By closing the oil delivery channel, it is ensured that when the machine is at a standstill or when the device for oiling a running yarn is not in use, no oil drips out of the oil transfer element and contaminates the yarn guide device. Depending on the viscosity of the oil used, a large amount of oil can flow out of the oil transfer element even after the metering pump is switched off and contaminate machine elements or yarn packages arranged below the device.

Advantageously, the control regulates the amount of oil reaching the yarn guide device via the drive motor of the metering pump. Thanks to the built-in flow sensor, the controller can carry out a target/actual comparison of the oil quantity and regulate the delivery rate of the metering pump accordingly. The target values for the control can be entered on the control via the keypad or are stored, for example, in a database in the control itself, so that when the yarn to be processed is entered, the control automatically sets the necessary oil delivery rate.

Preferably, a heating coil with an input temperature measurement and an output temperature measurement is provided and the control regulates a temperature of the oil at an output of the heating coil. The one to be regulated The temperature must be determined depending on the oil used and specified to the control system.

The control is advantageously designed in such a way that the device is operated autonomously, with communication being carried out via the visualization and the keypad. This means that the device can be used for oiling a running yarn in a standalone operation and can be used in a variety of different locations since there is no dependence on a higher-level control system.

Figur 1

eine schematische Ansicht einer ersten Ausführungsform einer Vorrichtung nach der Erfindung;

Figur 2

eine schematische Schnittdarstellung an der Stelle A - A nach Figur 1 ;

Figur 3

eine schematische Ansicht einer zweiten Ausführungsform einer Vorrichtung nach der Erfindung;

Figur 4

eine schematische Schnittdarstellung an der Stelle B - B nach Figur 3 und

Figur 5

eine vergrösserte Schnittdarstellung an der Stelle C nach Figur 4.

The control is preferably connected to a higher-level machine control and regulation of an oil dosage quantity and/or an oil temperature is determined by the higher-level machine control. Through two-way communication between the control of the device and a higher-level control, the wetting of the running yarn can be coordinated with the operation of the machine. This has the advantage, for example, that when the winding machine in which the device is used is stopped, an amount of oil can be reduced correspondingly synchronously with a slowing down of a yarn speed, thereby preventing an excess of oil being applied to the running yarn. Further advantages of the invention are in described in the following exemplary embodiments. Show it:

Figure 1

a schematic view of a first embodiment of a device according to the invention;

Figure 2

a schematic sectional view at point A - A Figure 1 ;

Figure 3

a schematic view of a second embodiment of a device according to the invention;

Figure 4

a schematic sectional view at point B - B Figure 3 and

Figure 5

an enlarged sectional view at point C Figure 4 .

Figure 1 shows a schematic view of a first embodiment of a device according to the invention and Figure 2 a schematic sectional view at point A - A Figure 1 . A housing 2 has a yarn guide device 6, along which a yarn 1 is guided along the housing 2. The yarn guide device 6 is included open to the environment, so that the yarn 1 can be easily introduced into the yarn guide device 6. The entire course of the yarn 1 in the yarn guide device 6 can also be seen from the outside. An oil transfer element 7 is embedded in the yarn guide device 6. As the yarn 1 slides past the oil transfer element 7, oil is mechanically transferred to the yarn 1. The oil is brought to the device from a storage container (not shown) and introduced into the housing 2 via an oil connection 3. From the oil connection 3, the oil reaches the oil transfer element 7 via an oil delivery channel. The oil delivery channel is completely integrated in the housing 2 in the embodiment shown. A first section 8 of the oil delivery channel connects the oil connection 3 with a metering pump 4. The metering pump 4 is designed as a gear pump and is driven by a drive motor 5. The drive motor 4 is attached to the housing 2. In a second section 9 of the oil delivery channel, the oil is guided by the metering pump 4 to a closure element 11. The closure element 11 has an electromagnetic drive 12, the closure element 11 is installed in the housing 2 and the electromagnetic drive 12 is attached to the housing 2. The oil delivery channel between the second section 9 and a third section 10 can be closed by the closure element 11, so that no oil can reach the oil transfer element 7 when the device is at a standstill. In this second section 9, a flow sensor 13 is additionally provided; this serves to measure the amount of oil flowing through the second section 9. The third section 10 connects the closure element 11 with the oil transfer element 7.

Figure 3 shows a schematic view of a second embodiment of a device according to the invention and Figure 4 a schematic sectional view at point B - B Figure 3 . The basic structure of the second embodiment corresponds to the structure of the first embodiment, only the differences will be discussed below and the basic description will be given Figures 1 and 2 referred. The oil delivery channel is not completely integrated into the housing 2 in the embodiment shown. In the third section 10 of the oil delivery channel, a heating coil 14 is provided between the closure element 11 and the oil transfer element 7. The heating coil 13 has one at its end facing the closure element 11 Input temperature measurement 15 and an output temperature measurement 16 at an opposite end. With the help of the temperature measurements 15 and 16, a necessary heating energy to achieve a predetermined starting temperature of the oil at the end of the heating coil 14 can be determined. The viscosity of the oil is regulated via the oil connection 3 via the temperature of the oil when it exits the oil transfer element 7, regardless of its temperature when it enters the device. A control 17 is also attached to the housing. The control contains all the elements necessary for operating the device and has a visualization 18 and a keypad 19. The visualization 18 is shown as an example as a display. With the help of visualization 18 and keypad 19, the device for oiling a running yarn 1 can be operated autonomously. Alternatively, a touchscreen can be used to visualize and enter data.

Figure 5 shows an enlarged sectional view at point C Figure 4 . Oil reaches the oil transfer element 7 via the third section 10 of the oil delivery channel guided in the housing 2. The oil transfer element 7 is held in a recess in the housing 2 by the yarn guide device 6. The yarn guide device 6 is, for example, designed as a two-part element at the location of the oil transfer element 7. The two elements of the yarn guide device 6 are clamped into the recess of the housing 2.

The present invention is not limited to the exemplary embodiments shown and described. Modifications within the scope of the patent claims are possible, as is a combination of the features, even if these are shown and described in different exemplary embodiments.

Reference symbol list

1

yarn

2

Housing

3

Oil connection

4

Dosing pump

5

drive motor

6

Yarn guide device

7

Oil transfer element

8th

First section of the oil production canal

9

Second section of the oil production canal

10

Third section of the oil production canal

11

Closure element

12

Electromagnetic drive

13

Flow sensor

14

heating coil

15

Input temperature measurement

16

Output temperature measurement

17

steering

18

Visualization

19

Keypad

Claims (15)

Device for oiling a running yarn (1) with a control (17) and with a housing (2) and with an oil connection (3) provided in the housing (2) and with a metering pump (4) arranged in the housing (2) and with a yarn guide device (6) with an oil transfer element (7) mounted in the yarn guide device (6), the oil transfer element (7) being connected to the oil connection (3) through an oil delivery channel via the metering pump (4), characterized in that in the oil delivery channel Closure element (11) and a flow sensor (13) are provided, the oil delivery channel having a first section (8) from the oil connection (3) to the metering pump (4), a second section (9) from the metering pump (4) to the closure element (11). and a third section (10) from the closure element (11) to the oil transfer element (7) and wherein the flow sensor (13) is provided in the second section (9). Device according to claim 1, characterized in that the metering pump (4) is designed as a gear pump with a controlled drive motor (5). Device according to claim 1 or 2, characterized in that the closure element (11) is a shut-off valve with an electromagnetic drive (12). Device according to at least one of the preceding claims, characterized in that the third section (10) of the oil delivery channel is at least partially designed as a heating coil (12). Device according to claim 4, characterized in that the heating coil (12) is provided with an input temperature measurement (13) and an output temperature measurement (14). Device according to at least one of the preceding claims, characterized in that the yarn guide device (6) is attached to an outside (15) of the housing (2) and open to the surroundings of the device. Device according to at least one of the preceding claims, characterized in that the yarn guide device (6) is held in the housing (2) in a linearly displaceable manner. Device according to at least one of the preceding claims, characterized in that the oil transfer element (7) is detachably connected to the yarn guide device (6). Device according to at least one of the preceding claims, characterized in that a visualization (18) and a keypad (19) are provided in the housing (2). Device according to claim 9, characterized in that the visualization provides a display of at least one of the following information: an amount of oil; an oil temperature; oil consumption; an operating state; an operating mode; an operating time; an operating manual. Method for oiling a running yarn with a device with a control (17) and with a housing (2) and with an oil connection (3) provided in the housing (2) and with a metering pump (4) arranged in the housing (2). Drive motor (5) and with a yarn guide device (6) with an oil transfer element (7) mounted in the yarn guide device (6), the oil transfer element (7) being connected to the oil connection (3) through an oil delivery channel via the metering pump (4), thereby characterized in that via a first section (8) of the oil delivery channel Oel from an oil connection (3) to the metering pump (4) and then via a second section (9) of the oil delivery channel Oel through a flow sensor (11) is pumped to a closure element (9) and via a third section of the oil delivery channel to the yarn guide device (7), the control (17) closing the oil delivery channel by actuating the closure element (9) when the metering pump (4) is at a standstill. Method according to claim 11, characterized in that the control (17) regulates an amount of oil reaching the yarn guide device (6) via the drive motor (5) of the metering pump (4). Method according to claim 11 or 12, characterized in that a heating coil (12) with an input temperature measurement (13) and an output temperature measurement (14) is provided and a temperature of the oil at an output of the heating coil (12) is regulated by the control (15). becomes. Method according to at least one of claims 11 to 13, characterized in that the control (17) is designed such that the device is operated autonomously, with communication being carried out via the visualization (18) and the keypad (19). Method according to at least one of claims 11 to 14, characterized in that the control (17) is connected to a higher-level machine control and regulation of an oil dosage quantity and/or an oil temperature is determined by the higher-level machine control.

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