JPS5846574B2 - Lubricated spinning rotor bearing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In this invention, a shaft supporting a spinning rotor is disposed in a bearing housing provided with a lubrication hole, and is held by two rolling bearings that are lubricated with grease. A shaft-wrapping guide for lubricant is fixedly arranged, which guide relates to the spinning rotor bearing, which delivers the lubricant radially from its end face facing the rolling bearing to the rolling bearing.

West German Utility Model No. 6938 for such a spinning rotor bearing
No. 370 is publicly known.

In this known device, the guide body is in close contact with the inner circumference of the bearing nozzle, and the outer circumferential surface of the guide body has a vertical groove that stores grease as a lubricant. Guide to the end face.

A metal ring is applied to each end face, the metal ring having an opening smaller than the cross-section of the flute and aligned with the flute.

The metal ring contacts the bearing ring of the rolling bearing and is heated as the bearing rotates, which melts the grease at both ends of the longitudinal groove and causes it to flow out from the opening in the ring and lubricate both rolling bearings. There is.

However, the grease in the center of the vertical groove is not heated, or even if it is heated, it is only heated to a small extent, so it is not lubricated and ages.

If grease is forced into the center of the vertical groove using the lubricating nipple of the bearing, the aged grease in the center can be pushed to the ends of the vertical groove.

However, at the ends of the vertical grooves, there are residual solids from the melted grease and aged grease that has been pushed away, so even if the rolling bearing is lubricated by heating, it will only result in poor quality lubricant. Can not.

This invention guarantees full utilization of the contained lubricant for spinning rotor bearings rotating at very high speeds, reduces maintenance effort, and eliminates the need for relubrication after long periods of operation. It is based on the challenge of not supplying poor quality lubricants to

This problem is solved by the configuration characterized in claim 1.

Through the holes in the outermost winding wall of the spiral guide for lubricant storage, if the holes are appropriately distributed on the wall surface, the lubricant can be drained from all of the stored lubricant into the guide. It enters the capillary gap formed between the winding walls, reaches the end face of the guide body by capillary action, and penetrates from the entire end face into the grease that is in contact with the rolling bearing.

This grease is therefore a lubricant coming from the reservoir, independent of the heating of the bearing, and the oil content is always kept at the saturation limit, ensuring high-quality lubrication without the risk of over-lubrication.

In this invention it is possible to use oil as a storage lubricant.

This oil can be re-lubricated easily and without compromising the quality of the lubricant subsequently supplied when the bearing is required for replenishment after long-term operation.

Advantageous embodiments of the invention are set out in the claims 2 et seq.

The embodiment according to claim 2.3 is advantageous if the storage lubricant is oil, in which storage and slow movement of the oil into the guide body is achieved and over-lubrication of the rolling bearings does not occur. do not have.

When filling the lubricant storage chamber between the outer peripheral surface of the guide body and the inner surface of the bearing nozzle with grease through the lubrication hole of the bearing nozzle, this is especially done for necessary relubrication after long-term operation of the bearing. In this case, there is a risk that the distribution of the newly added grease to the storage chamber and the grease already in the chamber will not be optimal.

In addition, when applying grease, the grease may be pushed in too little or too hard, causing the grease to enter the capillary cavity and block the flow of the lubricant there.
It passes by the guide and reaches directly to the rolling bearing.
As a result, excessive lubrication may occur.

As in the embodiment shown in Figures 4 to 8, when lubricating or relubricating from the lubricating hole on the No-Ujifugu side, the grease storage chamber can be evenly lubricated or refilled without the risk of over-lubricating the bearing. Ru.

Further, as in the embodiment shown in Figs. 4 to 8, holes for supplying grease and holes for discharging grease are provided in the bearing housing at intervals close to the circumferential direction, and vertical webs are arranged at intervals between both holes. By interrupting the grease reservoir, the newly pressed grease can fill the reservoir and then exit through the outlet hole, thereby indicating that the reservoir has been completely refueled.

In addition, if both holes maintain a gap in the axial direction, for example, if one is placed at one end of the grease storage chamber in the axial direction and the other at the other end, the grease can be injected into the chamber both circumferentially and axially. Move.

In particular, if the outlet hole is made larger than the inlet hole, optimum grease distribution can be achieved during the first lubrication, and during subsequent lubrication most of the grease remaining in the guide can be absorbed by the newly supplied grease. can be discharged from the exit hole.

Due to the outlet hole, only the force required for complete injection has to be generated when pushing the grease into the reservoir.

Furthermore, in the embodiment of FIGS. 4-8, the movement of grease within the storage chamber that occurs during greasing is adapted for distribution.

The longitudinal webs and tongues that serve to guide the grease can also be integrally provided on the inner wall of the bearing housing or on the outer circumferential surface of the guide body.

However, it is easier to form the inner wall surface of the 1-1 bearing housing and the outer peripheral surface of the guide body, so it is easier to form the inner wall surface of the bearing housing and the outer circumferential surface of the guide body, so the vertical web and the tongue piece are made as a distribution body separately from the housing and the guide body, and it is necessary to fit them into the grease storage chamber. You can also do this.

The present invention will be explained below with reference to the drawings.

In FIG. 1, 1 indicates a bearing housing and 2 a shaft, which is held in two rolling bearings 3, 4 located near each end of the bearing housing 1.

In this case, the raceway grooves for the rolling elements are formed on the shaft and the bearing housing, respectively, but the raceway grooves may also be formed on the inner circumference of the bearing, or on the ring fitted to the outer circumference of the shaft.

The rolling elements are held in cages 5 and 6.

The ends of the bearing 1 are closed by sealing discs 7, 8, and the end of the shaft 2 protruding through the sealing disc 7 supports the spinning rotor S of the open-end spinning machine, and the opposite side of the shaft 2 A tangential drive belt R acts on the end of the belt.

The spinning rotor bearing shown is suitable for very high rotational speeds (e.g. approximately s
oooRPM), the lubrication system described below providing the necessary lubricant during long-term operation.

On both sides of each rolling bearing 3, 40 there is also allocated a quantity of grease 9, 10, 11, 12 capable of lubricating it for a certain operating time.

In order to increase the amount of grease as much as possible, recesses 13 and 14 are formed on the inner periphery of the bearing housing 1 in the area between the end face and the rolling bearing to increase the amount of greases 9 and 12.

The bearing housing 1 is located in the area between the rolling bearings 3 and 40.
On the inner periphery of the bearing housing 1, a lubricant storage chamber 15 is created by another recess, and in the step of the stepped wall 17, 18 on the inner periphery of the bearing housing 1, which limits both ends of this chamber 15, a tubular lubricant storage chamber 15 is formed. A guide body 16 surrounds the shaft 2 with each end fitted.

As can be seen in FIG. 2, this guide body 16 is a part made of a strip material wound in a spiral shape at narrow intervals.

The strip material is preferably metal, but may also be plastic.

The spiral guide body 16 is rolled up using its radial elasticity to reduce its diameter, is pushed into the bearing Ujifugu 1, and is then expanded in diameter by restoring force, with both ends connected to stepped walls 17 and 18.
Support and fix it on the step.

In addition to being fixed axially by the steps, the guide body 16 is also held firmly in the bearing housing 1 in the radial direction by the restoring force that tends to expand further.

However, a capillary gap is maintained between the mutually outer and inner winding walls forming the vortex in the held state.

The guide body 16 is at least double-layered, and at least the outermost winding wall 16a facing the lubricant storage chamber 15 has a hole 19, which connects the outermost winding wall 16a and the second winding wall inside thereof. , the capillary gap 20 between the winding wall 16b without holes and the lubricant storage chamber 15 is communicated with each other.

In the developed view of the guide body 16 shown in FIG.
1 represents the boundary between the outermost winding wall 16a and the second inner winding wall 16b.

Both ends of the guide body 16 reach the greases 10 and 11 and isolate the greases 10 and 11 from the lubricant storage chamber 15 by being supported by steps of stepped walls 17 and 18 .

The oil coming out of grease 9, 10, 11, and 12 is absorbed by the rolling elements.
The raceway grooves and the rotation areas of the cages 5 and 6 are lubricated.

The lubricant reservoir 15 is filled with grease, suitably of the same type as the grease already applied to the rolling bearing, through a lubrication hole in the bearing housing 1, which can be closed with a plug 22.

The oil content of this packed grease enters the capillary gap between the outermost winding wall and the next inner winding wall through the holes in the outermost winding wall of the guide body, and is absorbed by capillary action at each end of the guide body. This oil then exits into greases 10 and 11 and from there to the rolling bearings.

Therefore, this replenishment continues for a long time until the grease packed in the chamber 15 is exhausted.

In this case, in order to fully utilize the packed grease, holes should be distributed throughout the entire axial direction in the outermost winding wall of the guide body, as shown on the left side, instead of the one shown on the right side of Figure 3. It is a good idea to open one.

The grease contained in the lubricant reservoir lubricates both rolling bearings during long operating periods without the need for replenishment.

In order to lubricate for a long time, as shown in the figure, guide body 1
6 can be tripled.

In this case, the innermost winding wall 16c facing the shaft 2 also has a hole 1.
9 are distributed over the entire surface as shown in FIG.

A dashed line 23 indicates a boundary between the second intermediate winding wall 16b and the innermost winding wall 16c.

This allows the annular space between the shaft 2 and the innermost wound wall 16c to be used as another lubricant storage chamber, into which the grease 24 can be placed.

The grease put in this is the same type of grease on both ends 10.1
1 and is in contact with the innermost winding wall 16c.

Then, the oil in the grease 24 enters the capillary gap 25 between the innermost winding wall and the middle winding wall through the hole 19 of the winding wall 16c.
reaches the end of the hole and enters the greases 10 and 11 through this hole, saturating the greases 10 and 11.

Since the holes 19 are distributed over the entire surface of the innermost wound wall 16c, oil can be extracted from the entire grease 24 as described above.

Particularly advantageous, as mentioned at the outset, is the lubricant storage compartment 1.
Instead of filling 5 with grease, the chamber 15 contains a liquid lubricant, preferably an oil corresponding to and at least matching in terms of oil slickness the base oil contained in the grease applied to the rolling bearing. That's true.

In this case, a liquid lubricant is stored in the lubricant storage chamber 15 in the form of an object, which is discharged into the guide body 16, for example, from a porous material fitted outside the guide body 16 as shown in FIG. Insert the hollow cylinder 26.

This hollow cylindrical body 26 is provided with an annular groove 27 in the center of its outer circumferential surface that is connected to an oiling hole in the bearing housing 1 that can be closed with a plug 22, and the oil injected from this oiling hole into the annular groove is evenly distributed into the hollow cylinder. Let 26 be the goldsmith.

After the hollow cylinder 26 has reached its storage limit, the oil still remaining in the annular groove 27 is absorbed into the hollow cylinder 26 as oil is released from the hollow cylinder 26 into the guide body 16.

Therefore, in this case, as shown in FIG. 3, the outermost winding wall 16a has the largest wall thickness at both ends of the hollow cylinder 26, and the holes 19 are formed in the outermost winding wall 16a corresponding to the portion where oil can be stored. Open.

As already mentioned, the oil released from the hollow cylinder 26 by capillary action in the gap 20 flows in a small amount to the grease 1.
0.11 and maintains a saturated state.

Even if the lubricant storage chamber 15 is completely filled with oil, the rolling bearings 3 and 4 will not be overfilled with oil.

This is because the oil kept in the hollow cylinder 26 is consumed and released into the rolling bearings 3 and 4. Outside the mounting plate, the end face of the capillary gap 20 is closed with grease 10° 11. This is because it cannot get into the greases 10 and 11.

This bearing thus provides a sufficient supply of lubricant during long operating periods.

If liquid lubricant is stored, it can be easily refilled and stored again after long operating hours.

Re-lubrication can also be done by leaving the bearing in place, possibly in the mounting of the spinning machine.

In this case, there is no risk of the capillary gap between the rolling bearings 3, 4 and the guide body 16 becoming contaminated.

This is because the hollow cylinder 26 acts as a filter and protects the guide body and the rolling bearing from dirt that tries to get inside through the oil fill hole of the bearing housing 1.

This re-lubrication alone constantly saturates the greases 10, 11 and each end of the stored grease 24 that is in contact with them.

Even if the grease 24 is completely depleted and exhausted after a long period of operation, end saturation is guaranteed.

A lubricant that can adjust the amount of lubricant can be used for initial lubricating and re-lubricating the lubricant storage chamber 15.

The flow of lubricant to the end face of the guide body 16 by capillary action in the gaps 20 and 25 is optionally assisted by a pumping effect caused by vibrations of the guide body when the shaft rotates.

The spinning rotor bearing shown in Figure 4 is basically the same as the bearing in Figure 1, with 1 being the bearing housing, 2 being the shaft, and 3 and 4 being the
7 and 8 are closed disks closing both end faces of the bearing housing 10, S is the spinning rotor of an open-end spinning machine, which is attached to one end of the shaft, and R is a tangential drive acting on the other end of the shaft. Belts 9 and 10.11 and 12 Grease on both sides of each rolling bearing 3 and 4, 15 is a lubricant reservoir provided in the bearing housing 1 in the area between both rolling bearings.

The stepped walls of the bearing housing delimiting the ends of this chamber 150 have steps 17 and 18 for a guide body 260 arranged around the shaft 2 .

This guide body 260 is also a part made of a spirally wound strip material as shown in FIG.
It is fixed at 8.

This guide body 260 differs from the guide body shown in FIGS. 1 to 3 in that it has holes 19 over the entire surface of both the outer winding wall 260a and the inner winding wall 260c.

There is no hole in the intermediate winding wall 260b, and there are capillary gaps 20 and 2 extending between the ends of the guide body 260 between the individual winding walls.
There are 5.

The capillary gaps 20 and 25 are exaggerated and drawn in a large size for ease of understanding in the figure.

When assembling the bearings, add greases 9 and 12, and use the oil that comes out to lubricate bearings 3 and 4.

In addition, the annular gap between the shaft 2 and the guide body 260 is also filled with grease 24, so that the oil in the areas near the bearings 3 and 4 goes to the bearings 3 and 4, and the oil in other areas goes to the inner winding. wall 2
Through the hole 19 of 60c, the inner winding wall and the middle winding wall 260b
The guide body 260 enters the capillary gap 25 between the
from each end to bearings 3 and 4.

Similarly, the oil content of the grease 31 in the storage chamber 15 passes through the hole 19 of the outer winding wall 260a and the intermediate winding wall 260.
It enters the capillary gap 20 between b and similarly reaches the bearings 3 and 4 from its end face.

In order to contain this grease 31, the bearing housing 1 has, in addition to a grease filling hole 32, an outlet hole 33 at a position close to this hole in the circumferential direction, and the outlet hole is larger (see FIG. 9).

Both holes have removable plug caps.

In FIG. 6, dash-dotted lines 32/ and 33' indicate the positions of these two holes 32 and 33, which are spaced apart in the axial direction of the bearing.

The dash-dotted lines indicate that the holes 32 and 33 are axially separated, one near one end of the storage chamber 15 and the other near the other end, and also indicate the location of the cross-section in FIG.

In the circumferential spacing between the two holes 32 and 33 in the storage chamber 15, an axially extending longitudinal web 34 is arranged.

Therefore, the grease pushed into the grease filling hole 32 cannot exit from the grease outlet hole 33 unless it circulates in the grease storage chamber 15 in the circumferential direction.

Since the two holes 32 and 33 are located at each end of the reservoir 15 and are axially spaced apart, the grease is also forced to move axially within the reservoir 15 so that the entire interior of the reservoir 15 is free of grease. is satisfied.

The movement of the grease in the storage chamber until it leaves the outlet hole 33 can be further improved by providing tongues 35 and 36 on each side of the longitudinal web 34, spaced apart from each side.

As can be seen in FIG. 8, the tongue piece 35 protrudes from one end of the vertical web 34 from the end of the vertical web 34 on the side where the oil filling hole 32 is located to near the other end so that the oil filling hole 32 is located deep inside, and Tongue piece 36
On the other hand, there is an exit hole 33 in the back from the other end of the vertical web to one end.
It is provided on the opposite side so that the

The tongues 35 have one side of the longitudinal web and an opposite guiding edge 35' to transfer the entered grease axially to the other end of the chamber 15 and then laterally from there in the circumferential direction. After filling the chamber 15 through the gap, it is finally moved into the gap between the guiding edge 36' of the tongue 36 and the other side of the longitudinal web 34 and reaches the outlet hole 33.

By moving the grease in this way, not only can the storage chamber 15 be completely filled with grease, but also when re-lubricating, the used grease remaining in the chamber is pushed out from the grease outlet hole 33 with newly supplied grease. By lubrication until new grease comes out of the outlet hole, the interior of the interior is almost filled with new grease, and if any old grease remains, it is only in the corners of the interior.

The longitudinal web 34 is fitted as a part into the grease reservoir 15 as shown.

When the tongues 35 and 36 are used, they may be molded integrally with the longitudinal web 34 and fitted, or may be molded separately from the longitudinal web, fitted, or fixed to the longitudinal web by gluing or the like.

These may be parts made of plasticag.

This longitudinal web is held firmly in the axial direction within the storage chamber 15 by filling it axially.

In order to fix this in the circumferential direction of the chamber 15, a fixing protrusion 37 that projects into the outlet hole 33 from the inside may be provided on the outer surface of the chamber 15 and engaged with the outlet hole 33.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of a spinning rotor bearing according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of a guide used in the same, FIG. 3 is a scaled developed view of the guide, and FIG. 5 is an enlarged cross-sectional view of the guide shown in FIG. 4, FIG. 6 is a scaled developed view of the guide shown in FIG. 4, and FIG. FIG. 8 is a cross-sectional view along the area of the grease supply hole and outlet hole of the bearing shown in the figure, and FIG. S is a spinning rotor, 3 and 4 are rolling bearings,
9 and 10, 11 and 12 are greases for lubricating each rolling bearing, 16 and 260 are guide bodies, 19 is a hole, and 20 and 25 are capillary gaps.

Claims (1)

[Claims] 1. A shaft that supports a spinning rotor is held by two rolling bearings that are arranged in a bearing housing with a lubrication hole and are lubricated with grease from the No-Ujifugu, and a shaft that supports a spinning rotor is held between the two rolling bearings. Guide 16.260 is a spinning rotor bearing in which a tubular guide enveloping the shaft for lubricant is fixedly arranged, the guide delivering the lubricant in the radial direction to the rolling bearing from its end face facing the rolling bearing. are at least double wrapped walls 16a and 16b, 260a and 26 separated by a narrow gap.
0b, its winding wall 1 facing the lubricant in a spiral shape
6a, 260a have a hole 19 which communicates with a capillary gap formed inside the guide body and extending to the end face, which capillary gap extends from one end face to the other end face of the guide beam 16°260. A lubricated spinning rotor bearing characterized by: 2. The bearing according to claim 1, wherein an impregnated body for storing liquid lubricant is fitted in the lubricant storage chamber 15 located between the outer winding wall 16a of the guide body and the bearing nozzle 1. 3 The impregnated body that stores liquid lubricant is the outer winding wall 1 of the guide body.
A bearing according to claim 2, which is a hollow cylinder 26 placed over the top of the bearing housing 1, and has an annular groove 27 in the center of its outer peripheral surface, and an oil hole formed in the bearing housing 1 communicates with the annular groove. .