JPS5927791B2 - Refueling composition and wick material therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wick material for use in various lubricating devices, particularly a wick material in the form of expanded granules.

Various oiling compositions containing wick materials are known in the art and are commercially useful for lubricating various devices, such as electric motors.

Well-known wick-type refueling compositions are made from a variety of fibrous materials such as cellulose and synthetic fibers, including, for example, wood fibers, cotton fibers, nylon fibers, rayon fibers, and the like.

One type of oiling composition, such as a useful commercially available oil-filled fibrous wick material, is "PARMAWICK J" from Permavik Company.

U.S. Pat. No. 2,966,459, entitled "Oil Retaining Materials," describes an oiling composition comprising cellulose fibers and lubricating oil.

The cellulose fibers that form the oil-absorbing portion of the wick material are made from a mixture of wood fibers and paper-containing fibers such as wood and cotton.

U.S. Pat. No. 3,214,375, entitled "King Material for Refueling," shows an oil-filled wick material in which the wick material is a mixture of cellulose and synthetic fibers, such as nylon or rayon fibers.

It is stated that the cellulose fibers are at least partially coated with a coating of polyvinyl alcohol.

U.S. Patent No. 3,466,244 “Oil-filled wick material”
describes a lubricating composition, i.e., a wick material filled with lubricating oil, formed from linter fibers.

The above three patents are each assigned to the Permavik Company, and these patents cover useful commercially available "Permavik" extruded refueling materials, i.e. in each case where the wick material has a distinct fibrous structure. states.

Although the oiling compositions of these patents offer some advantages, one of their disadvantages is that such oiling compositions can release only a small portion of their liquid lubricant.

U.S. Patent No. 2,960,371 [Bearing Lubricating Mechanism] and U.S. Patent No. 2,979,779, ``Improved Method for Manufacturing a Bearing Lubricant Mechanism,'' both disclose that epoxy or phenolic material is directly foamed in the bearing housing, An oil-filled refueling mechanism made from a porous foam is described.

After this foam is formed within the bearing housing,
It is filled with suitable lubricating oil.

The use of glass, asbestos, and other fibers as fillers in refueling compositions is also known in the art.

U.S. Pat. No. 2,303,068, ``Lubricants and Process for Preparing Same'', describes the use of asbestos fibers as a filler to form viscous oiling compositions.

U.S. Pat. No. 3,113,105 describes a liquid silicone lubricant incorporating short pieces of fibrous glass to form a refueling composition for high temperature use.

A known type of wick type oiling composition in the art, which has been used in many bearing mechanisms, employs a felt oiling wick.

For example, there are US Pat. No. 3,434,765 entitled "Bearing Lubrication Apparatus and Method for Producing the Same" and US Pat. No. 3,184,272 "Method for Lubricating Rotating Devices."

In such a structure, the lubricant-filled or wick material
It is desirable to discharge the lubricating oil contained therein to the rotating structure to be lubricated at a constant rate sufficient to maintain a uniform flow of the lubricant through the felt wick.

The major problems facing this technology are the following disadvantages.

That is, many conventional lubricating compositions or extruded lubricating oil-filled wick materials contain only a relatively small or small portion of the total lubricating oil volume while being extruded or filled into the bearing structure. The purpose is to emit.

The smaller the proportion of oil that can be released, the shorter the life of the lubricant (and thus the life of the bearing structure itself).

Moreover, the non-releasing portion of lubricant clearly does not serve to perform the intended lubrication function.

It is an object of the present invention to provide a novel wick material, and an incidental object thereof is to provide a refueling composition using this wick material and a method for producing the same, and also to provide a refueling composition using this wick material, and a method for producing the same, which overcomes the shortcomings or disadvantages of the prior art methods as described above. Providing a method of refueling using a refueling composition; Providing a wick material formed from a foamed polymeric material; Collection of expanded particles generally having discontinuous, multi-branched, non-fibrous and elastic physical properties providing a wick material comprising: providing a refueling composition comprising said wick material having liquid lubricant release and transmission properties similar to those of conventional wool storage wick materials; having improved moisture resistance; Moist,
Providing a refueling composition comprising the above-described wick material that is resistant to leaching of the liquid lubricant contained therein even in damp, wet environments; a simple and economical method of forming the above-described refueling composition. To provide a lubricating method that has a long service life in both dry and humid atmospheres with a minimum amount of lubricant; A lubricating composition utilized as a storage wick method which absorbs at least a large portion of the liquid lubricant it contains; SUMMARY OF THE INVENTION There is a provision for a method of refueling a bearing device in a machine having the ability to discharge into a wick means.

Other objects of the invention will be partly obvious, and partly will be pointed out hereafter.

Generally, the wick material of the present invention contains from about 5 meshes to about 200 meshes.
It is a collection of discontinuous, non-fibrous, inhomogeneous elastic foam particles with sizes between meshes.

Additionally, the wick material may be a synthetic polymeric material, such as a polyester or polyether polyurethane foam, cut or otherwise formed into particles within a preferred range of sizes.

Additionally, the oiling compositions of the present invention generally consist of a liquid lubricant and a collection of non-fibrous, heterogeneous, foamed particles that releasably retain the liquid lubricant.

In particular, the expanded particles are milled or otherwise formed from synthetic polymeric materials that are insoluble and inert in the liquid lubricant.

The liquid lubricant and foam particles are liquid lubricant 70 to 80%.
% by weight and foamed particles at a ratio of 20 to 30% by weight.

Additionally, in general, the method of the present invention for making oiling compositions comprises a mass of discontinuous, non-fibrous, heterogeneous elastic particles.
In order to produce elastomeric polymer foam, an aggregate of particles is mixed with a lubricating liquid at a ratio of about 20 to 30% by weight of the particles to about 70 to 80% by weight of the liquid lubricant. Become.

Additionally, the particles are between about 5 meshes and about 200 meshes in size, and the liquid composition thus formed is filled into the bearing group by hand or using commercially available equipment. .

Generally, but additionally, the method of lubricating a bearing portion in a refueling chamber includes a lubricant storage wick means disposed in moving relationship of the lubricant in an intermediate portion between the lubricant storage means and the bearing portion. a lubricant-feeding wick means, comprising a collection of discontinuous, non-fibrous, multi-branched, elastic foam particles filled with a liquid lubricant and capable of discharging at least a major portion of the liquid lubricant into the lubricant-feeding wick means; It consists of lubricant storage wick means containing.

Next, the drawings will be explained.

FIG. 1 is a sectional view of a bearing chamber illustrating the lubricating method of the present invention using the lubricating composition formed according to the present invention.

FIG. 2 is a 40x photomicrograph of expanded polymeric particles of the present invention having a size between about 20 and 35 meshes.

FIG. 3 is a 40x photomicrograph of foamed polymer particles similar to the particles in FIG. 2 but mixed with a liquid lubricant.

Figure 4 and Figure 4A are approximately 20 meshes and 30 meshes, respectively.
FIG. 2 is a 20x microscopic photograph of mesh-sized foamed polymer particles.

Figures 5 and 5A are approximately 60 meshes and 10 meshes, respectively.
It is a micrograph of a size 0 mesh magnified 20 times.

FIG. 6 is an overview of the reaction dynamometer test machine.

FIG. 7 is an overview of the oil release tester.

FIG. 8 is a graph comparing the oil release properties of oil-impregnated wool felt and the oil release properties of the oil supply composition of the present invention.

FIG. 9 is a graph comparing the oil release performance of oil impregnated felt with that of the oiling composition of the present invention.

FIG. 10 is a graph comparing the oil release performance of the oiling composition of the present invention to that of commercially available useful oiling compositions.

Corresponding reference numerals indicate the same parts throughout the drawings.

Next, the present invention will be explained with specific examples, but this invention is not intended to be limited in any way.

Now, generally speaking according to the drawings, the wick material of the present invention, which retains the liquid lubricant 3 for release, is designated 1 and, as will be explained below, this wick material is discontinuous, non-fibrous, multi-branched. It is an aggregate of elastic, foamed particles 5.

Furthermore, the oiling composition 7 of the present invention is a mixture of such an aggregate of foamed particles 5 and a liquid lubricant 3.

The wick material 1 and the refueling composition 1 are particularly useful in a variety of devices, including, but not limited to, bearing means for power machines and the like.

In the oil supply system of the present invention, generally indicated at 9 in FIG.
A bearing mechanism or device, such as a tin Babbitt alloy sleeve bearing 10 (not shown)
It is supported in a structure such as an end shield 11 of a device such as a power machine, in which a rotating part such as a shaft 12 is rotatably supported and incorporated within bearing means.

The end shield 11, together with the end cap 14 and oil hole cover 15, has a refueling chamber or cavity 16 for receiving and holding a lubricating oil storage wick means, such as refueling composition 1.
It outlines.

A wool felt wick 1 is used to deliver liquid lubricant or lubricant from the oiling composition 7 to the bearings 10 and shaft 12.
A refueling wick means, known in the industry such as No. 9, includes an interface between a refueling composition and a surface integrated around a rotary shaft 120 extending through an opening or window 20 in a bearing 10. and are commonly arranged in lubricant transporting relationship.

A return means, such as an oil input or slinger 21, is then installed on the shaft 12 in a manner well known in the art for returning or inputting oil.

The oil flows from the refueling wick means back to the reservoir of refueling composition 7 between the bearing and the shaft.

Although there are several applications where the refueling composition 7 is used in a direct lubricant transfer relationship, i.e., in relation to a shaft, a preferred example is to apply the liquid composition as described above (relatively lubricating the lubricant with the refueling wick means 19). The oiling composition is used in connection with the transport of the agent.

Furthermore, the structure of the oiling system 9 is merely illustrative, and it is similar to the oiling composition 7 as well as the sleeve bearing 1 shown.
It is not limited to 0 in any way.

Also, for example, US Patent Nos. 2,966,459 and 343
No. 4765, No. 3184272 and No. 29600
The bearing structure shown in the '371 patent should also be referred to in connection with the above.

Further, with particular reference to Figures 2-4, the wick material 1 is a discontinuous, multi-branched, non-fibrous elastic material that is substantially inert and insoluble in the liquid lubricant 3 carried by the wick material. This is a certain synthetic polymer foam particle 5.

Such a polymeric foam wick material 1 is first formed by manufacturing a polymeric foam with an elastic porous structure, such as the widely known polyurethane foam.

The foamed elastomeric polymer is then ground or otherwise comminuted.

A particle size of about 8 mesh or less is preferred, particularly a particle size such that a majority, e.g. 65 to 85%, of the particles pass through a 20 mesh screen and only about 2 to 10% of the particles pass through an 80 mesh screen. It is more preferable.

The polymeric foam particles 5 used are produced by crushing a spongy structure.

That is, both the cell bones and the cell walls of the foamed polymer are crushed or ruptured to produce discontinuous, highly irregular, branched or multi-branched, elastic, non-fibrous foam particles 5.

The foam particles 5 not only have a large irregular surface area with many corners, but also physically hold a high volume of liquid lubricant 3, such as lubricating oil, compared to the weight and volume of the wick material itself. Urugo is generally a multi-angular, multi-branched particle.

In FIGS. 2 and 3, the structure of the characteristic polymeric, non-fibrous wick material 1 is shown substantially enlarged for clarity.

The highly irregular, multi-branched, non-fibrous, angular nature of the foam particles 5 is evident in the micrographs shown in FIGS. 2 and 3.

Furthermore, the foamed particles 5, together with each other, form a high-capacity, elastic, low-density wick material capable of absorbing large amounts of liquid lubricant 3, as seen in FIGS. 4 and 5.

The refueling composition 7 comprises a particular non-fibrous polymeric material, e.g. a collection of discontinuous, non-fibrous, multi-branched, elastic foam particles 5 of the wick material 1 described above, and a suitable liquid lubricant, e.g. Oil 3 is formed by mixing or otherwise combining with oil 3.

Although comminution of the polymeric foam may be done in a single step, the foamed polymer is flaked, cut or otherwise reduced into smaller pieces or particles and mixed with a lubricating fluid;
Furthermore, it may be finely pulverized to the desired size as described above using a suitable pulverizer or the like.

Polymeric materials useful in connection with the present invention include the well-known ester and ether type elastomeric polyurethane foams.

These foams are well known in the art;
Widely available from many commercial products under the generic name of "polyurethane" foam.

The fundamental property of a polymeric foam such as the polyurethane foam forming the wick material 1 is that the foam is block-shaped and can be distinguished as "elastic" rather than "hard". .

As used herein, the term refers to foams that give or produce the above-mentioned feel and which fully recover to their original shape when compressed by hand, and foams which, when compressed by hand, are crushed and pulverized and return to their original shape after compression. l' is what distinguishes it from relatively hard foams.

Desirably elastic, sponge foams retain their characteristic elasticity after being crushed and atomized, whereas rigid foams become brittle and inelastic after being crushed and atomized.

Other polymeric foams having the desirable characteristics of the foamed particles 5 of the wick material 1 include, for example, silicone foams available from Dow Corning and polypropylene foams available from Heibig Industries, Inc. , or polyethylene foam commercially available from Dow Corning.

The lubricating fluid may be of any type depending on the context and atmospheric conditions in which the lubricant is used.

For example, a motor device with a small horsepower number (frac
tionalhorsepower motor ap
U.S. Pat. No. 346 for
A lubricant such as that described in the 6244 specification as "280-oil" may be used.

The selected oil is mixed with a wick material 18 made from a particular polymeric material, such as pulverized polyurethane foam.

The wick material 18 is substantially saturated with lubricating fluid and is formed such that the refueling composition comprises about 20% by weight wick material and about 80% by weight lubricating oil.

This lubricating composition is then filled, as is well known in the art, by hand or with a suitable extruder commercially available, into the bearing chamber, e.g., in the particular end shield, to lubricate the shaft and sleeve bearing or other bearing mechanism. This lubricating liquid is applied either directly or through a felt wick.

Refueling Composition 7 will be described in more detail in the Examples below.

Examples 1 and 2 compare the oil release properties of the refueling compositions to those of a conventional wool felt wick used in a bearing mechanism.

It should be noted that the examples are for illustrative purposes only and do not limit the present invention in any way.

Example 1 An ester polyurethane foam having approximately 60 micropores per 2,54 cfIL (1 inch) was passed through a 5-mesh screen of American standard sieves, all of the deformed particles thereof.
The particles were ground until most of them passed through a 20 mesh screen.

Next, the obtained aggregate of the above polyurethane polymer was
28o'' type lubricating oil, the polyurethane accounts for about 30% by weight in the oil supply composition or mixture, and the lubricating oil accounts for about 70% by weight.
Mixed completely to account for.

The lubricant-filled wick material thus prepared was filled into the end shield of a General Electric Company 39-frame motor of the type shown in FIG.

However, the device has been modified to prohibit recirculation of oil into the bearing chamber.

The endshield to be tested was placed in a test rig of the type shown in Figure 6, and a bearing load of approximately 20 ky (45 lbs) was applied to the shaft outside the bearing structure.

Bearing temperature was maintained at 70°C.

An on-off cycle of 0.25 minutes off to 4.75 minutes on was applied.

The test results are shown in FIG. 8 as a solid line. This result, shown in Figure 8, was compared to the oil release rate of wool felt in a similar test using the wool felt storage wick material shown in dotted lines in Figure 8.

FIG. 8 shows that during the first few hours, the oil-filled wick material of the present invention releases oil at a rate high enough to achieve true bearing oiling; It can be seen that it does not overflow the wick material or overly stress the reabsorption rate capacity of the wick material.

It can be seen that after 37 hours, 53% of the oil has been released from the refueling composition 7 using this new wick material 1.

The open circles along this curve indicate the actual test measurements on which the curve was based.

The test machine is a dynamometer test machine, as illustrated in FIG.

In this device, the end shield 11 of a General Electric 39-7 Ram motor of the type shown in FIG. installed within.

The shaft 12 is driven by a motor 32 and is supported at one adjacent end by the end frame 11 and its bearing 10, and is connected to the swing bearing 30 and the drive motor 3.
2 is supported by a rear support bearing 34.

A shaft 12 extends through the test hair ring 10 and supports a load bearing bearing 35 and a weight 36 at its outer end.

As shown in FIG. 1, the oil supply top 19 is positioned above the shaft 12, so that the weight 36 is positioned approximately 180 degrees from the oil supply top, as shown in FIG.

However, depending on special test conditions, the weight 36 may be
It may be positioned at any other angle with respect to 9.

Example 2 An ethereal elastomeric polyurethane foam was milled as described in Example 1 and the specification above.

The resulting aggregate of expanded particles of polyurethane material was then thoroughly mixed with a 280 type bearing lubricating oil to create an oiling composition containing 20% by weight polyurethane particles and 80% by weight lubricating oil.

This lubricating oil-filled wick material or refueling composition was then tested in a copycat tester using such wick material when lubricating the end seal bearings of a General Electric Company 39-frame motor. .

A drawing of the tester used is shown in Figure 1.

In FIG. 1, the tester is approximately 1.4 crrL with an outer ring approximately 2.5 CIrL (1 inch) wide.

(5+in) steel wheels 40 are provided.

The wheels 40 are rotatably installed on the frame 41.

A pair of oil scrapers 42 are installed on the frame 41 to remove oil picked up by the outer race of the wheels 40.

A felt wiper 45 is mounted on the frame 41 and positioned towards the outer ring of the wheel 40 to remove any oil left behind by the skimmer.

A specimen of wick material filled with lubricating oil was placed in a test unit generally designated as 44.

Test unit 44 has a container or tube 46 having a capacity approximating that of the lubricant reservoir in a 39-frame motor endshield of the type shown in FIG.

A refueling felt core 48 extends to the outer ring of wheel 40 and through the end cap of the container.

The other end of tube 46 is capped with an end cap attached to reduce the pressure within tube 46 to be equal to the surrounding atmospheric pressure.

Aluminum heater coils 49 wrap around the circumference of tube 46, and thermocouples (not shown) are attached to control the temperature of the sample.

The temperature of the specimen was maintained at 75° C., and the wheel 40 was mounted on a 1+ in. shaft rotating at 175 Orpm in the end shield bearing of a 39-frame motor, while the wheel 40 was in contact with the end face on the oil supply. It was rotated at a simulated speed.

Oil consumption over time was determined by periodically weighing the sample container, tube 46.

The test results are shown in FIG. 9, with the results of the main test shown by the solid line and the comparative example of the all-felt system shown by the dotted line.

All-felt system results were obtained in the test apparatus of FIG. 7 using oil-filled wool felt as the test filler material.

Example 3 Polyether type polyurethane foam was obtained from United Foam Company.

This foam was used as approximately 3.8 cfrL (1+in) slices.

The manufacturing composition of the foam consists essentially of 60% by weight polypropylene glycol having a molecular weight of about 3000 and 40% by weight toluene diisocyanate, with additional amounts of suitable catalysts, lubricants, and foam stabilizers.

The foam was crushed or otherwise deformed in an Atsube rotary granulator, a cutting chamber consisting of two rotating blades and two fixed blades.

The crushed foam is sieved through a number of screens and subjected to two separate crushing or deforming processes.
A particle size distribution as shown in is obtained.

Each measurement listed in Table ■ is the average of at least three measurements.

In the table above, the residual amount of 69% means that 69% of the particles are 0.07%.
Less than 6 crfL (30 mils), meaning it passes through a 20 mesh sieve, but greater than 0.018 CIrL (7 mils), meaning it remains on an 80 mesh sieve.

The oil used in the oiling composition was a 280 type oil, specifically Sun 280 oil, Mobil 280 oil, and Sun 2 oil.
It is an oil contained in 80-NW (Spermless) oil.

The refueling compositions in the tests described hereinafter were manufactured in the following manner.

1. 200 parts by weight of polyurethane having the particle size shown in Table 1 was placed in a Hobart planetary mixer.

2 800 parts by weight of the selected 280 type oil was added to the mixer.

3 This mixture of oil and polyurethane particles was mixed for 20 minutes.

The polymer wick material filled with lubricating oil thus produced in Example 3 was used in 1. Hereinafter referred to as the oiling composition of Example 3, it was then used as a bearing lubricant and tested for various important properties.

The properties tested were; oil release properties; Extrudability and oil retention Dispersibility of oil in water.

For each of the above tests, the test results for the refueling composition of Example 3 were compared with a commercially available refueling composition, i.e., a wick filled with a lubricating oil such as "Permavik FHHJ" manufactured in accordance with the Permavik Company's patents. Comparisons were made with test results similarly conducted on the material.

The same lubricating oil, Sunoil 280-NW, was used as the lubricating oil contained in each wick material.

The commercially available wick material "Permavic FHHJ" was a cellulosic fibrous wick material consisting of 14 to 17% by weight of fibrous wick filling material and 83 to 86% by weight of sun oil.

In addition to the above properties, the oiling composition of Example 3 and the Permapic FHH commercial product were also compared for other properties considered to be less important than those listed above.

This product was found to be comparable to Permavic FHH on all sides.

The oil release properties of the oil supply composition of Example 3 were measured using an oil release tester shown in FIG.

The test chamber or tube 46 containing the wick material components was maintained at 75°C.

Then, the amount of oil transferred to the rotating wheel 40 was periodically weighed and measured.

The apparent oil loss was then displayed over time (
Figure 10).

The results of measuring the oil release properties of the oil supply composition of Example 3 using an oil release tester are further shown in FIG. 10 in comparison with the similarly measured oil release properties of Permavic FHH.

Both samples were filled by hand.

Test tubes or containers 46 also contain the same amount of material.

The oiling composition of Example 3 delivers 77% of the available oil, while Permavic FHH delivers only 23%.

Oil release data was also obtained from an endshield 11 installed as shown in FIG. 1 and having a bearing chamber filled with the oiling composition of Example 3.

For comparison, a similar end shield 11 was used with Permavik F.
Filled with HH refueling material.

In both cases, the bearing chamber 16 was filled using a commonly available lubricant extruder.

Next, this filled end shield 11 is attached to the shaft 12 outside the bearing 10 of the filled end shield.
It was installed in the reaction dynamometer shown in Figure 6 with a load attached above.

The bearing temperature was maintained at 70°C.

The shaft 12 is rotated at a speed of 120 Orpm,
．． It was cycled with 0.25 minutes "off" for 75 minutes "on".

All loads are felt wick 19 for refueling and bearing 1
It was installed at a position of 180° from the 0 window.

The bearing 10 was initially loaded to about 20.4 kg (45 lbs) and the load was changed to simply "skim" the oil well from the bearing.

Rotation direction (clockwise rcWI or counterclockwise rccWJ)
) was also changed to better take oil from the bearing 10.

Is the Permavic FHH filled in the end shield 11 21.4 when it is first filled? lubricant (17,1'
oil).

On the other hand, the end shield filled with the oiling composition of Example 3 contained 20.1 lubricant (16,4 S' oil).

Comparative data of measured oil release are shown in Tables ■ and ■.

The lubricant produced in this invention releases about 50% effective oil, whereas the Permavik-lubricated bearing releases about 34% effective oil.
% released effective oil.

The extrudability and oil retention of the oiling composition of Example 3 were evaluated by determining whether oil release or spillage occurred after the oiling composition of Example 3 was extruded.

In this test, the refueling composition of Example 3 was extruded onto a screen and the screen was placed on an aluminum pan.

The amount of oil spilled at 75° C. and room temperature was recorded.

The extrusion tester consists of two cylinders, and the longer one is about 0.
It has a pore diameter of 95CrIL (-i inches) and a length of about 17.
8CIrL (Finch).

The head of this cylinder is located at the bottom and is approximately 1.9 CrIL (+
It has a bore diameter of 3 inches and projects into a cylinder approximately 7.6 CIrL (3 inches) in length.

Extrusion tests are conducted measuring flow from such large diameter to small diameter to mimic commercially available extruders for useful refueling wick materials.

The condition was simply observed, and the oil supply composition of Example 3 remained in good condition, with uniform wettability and oil distribution ratio.

Screening tests showed no oil in the aluminum pan when the extruder was placed at 75°C and room temperature.

Similarly, the end shield filled with the oiling composition of Example 3 under normal extrusion conditions did not lose oil even when placed in a dryer at 75° C. with the bubble lowered for two weeks.

The displacement of lubricating oil by water from the oiling composition of Example 3 was evaluated in a water immersion test and a wash test.

A simple water immersion test was devised to determine the effect of water in the refueling composition of Example 3.

The comparison test was Permavic FHH.

In both cases, Sunoil 28-NW lubricating oil was used.

Water Displacement Tests Both machines filled with a 39-frame endshield 11 of the type shown in FIG. 1 and wick material not filled into the machine were tested.

In each test, the amount of oil contained in the lubricant was measured after immersing it in distilled water for a certain period of time.

After soaking in water, the lubricant was heated at 75° C. until all water was removed.

The difference between the original weight and the subsequent weight was taken as the measurement of the replaced oil.

In one type of water immersion test, the free lubricant charged to the wick material was weighed into a beaker at approximately 201.250C.

In each case, approximately at the bottom center of the beaker, a porous polyurethane plug was inserted to prevent the refueling wick material from floating.

After inserting the plug, distilled water was added to the 200 CC mark.

The beaker was kept at room temperature; 50° C. for 1 to 5 hours.

The results of a comparative test between the oiling composition of Example 3 and the Permavic FHH oiling composition are shown in Table 3.

Oil displacement comparisons were also made with 39-Frame Endshield 11 as a machine filled with refueling wick material.

The filled end shield was immersed in water at 20°C and the results are shown in Table 3.

The water flowability of the oil supply composition of Example 3 was determined by dropping distilled water onto the top of the bearing during operation and collecting the oil and/or water overflowing from the oil-filled cover.

For this purpose, a 39-frame bearing 10, shown in FIG. Opposed to the thrust collar pressed onto the shaft extension.

Bearing 10 was run at 1600 rpm and maintained at 2°C above 50°C with a 10 lb. round dowel attached to the opposite side of the fuel wick.

Distilled water was injected into the bearing 10 with a hypodermic needle by pressing it down on the side and along the shaft 12 as closely as possible to the bearing on the external oil drain 21.

I had a 30CC B&C syringe.

Sage syringe pump
p) was used to control the water flow rate.

A plastic tent was placed over the test chamber and a dish of water was placed to increase the humidity.

The relative humidity was kept between 60-76%. The test bearings and motors were tilted slightly and any overflowing oil or water fell onto one side of the oil cover, from where it was funneled into the measuring mold.

The flow rate of water was 4.5 cc per hour, and the total amount was 18 cc.

The test was conducted for a period of 4 hours and the effluents collected were as follows:

Oiling Composition of Example 3 - Oil 4. Q cc water 8.5
cc permavic oiling composition - oil 7.5 cc
The oil obtained from the oiling composition of Example 3 with 6 cc of water was a more oil-water emulsion than that from the Permavic-filled bearing.

In repeated tests, the relationship between the above differences is always the same, but
It wasn't always significant.

Increasing the temperature resulted in decreasing the difference in oil extraction amount.

Further research has revealed that the water-oil displacement rate of bearings is highly influenced by the ease with which water can pass through the channel banking.

Once such a path is created, water will pass through it quickly, but oil displacement in the vicinity will be slow.

Tests in glass tubes can be conducted much more quickly in the case of the crushed foam of the oiling composition of Example 3 in which the water channel is used than in fibrous permabic oiling, in which water tends to spread.

As mentioned above, the oiling composition using the wick material of the present invention is particularly important for oiling bearings of small horsepower motors.
Can be used in a wide variety of devices.

The present refueling composition may be used alone or in combination with a felt refueling wick.

The present lubricating composition is capable of supplying a major portion of the lubricating oil or fluid onto the bearing to which it is applied.

Furthermore, the present refueling compositions are highly suitable for use in automated manufacturing processes.

In particular, it is suitable for use in commercially available types of extruders, such as those used to inject the refueling composition directly into the bearing chambers of low horsepower motors during the manufacturing process.

Thus, there is provided a novel wick material, oiling composition, method of making the same, and oiling system which satisfies all of the above objects and advantages, among others, and which may be suitably modified in the process of forming the same. It will be obvious that those skilled in the art may make similar changes in the composition, arrangement, shape and details thereof without departing from the spirit and scope of the invention.

[Brief explanation of drawings]

Figure 1 is a sectional view of the bearing chamber, Figure 2, Figure 4, Figure 4.
Figures A, 5 and 5A are micrographs of the wick material of the present invention, Figure 3 is a micrograph of the refueling composition of the present invention,
Figure 6 is an overview of the reaction dynamometer tester, Figure 7 is an overview of the oil release tester, and Figures 8, 9, and 10 are graphs showing the oil release properties of the oil supply composition. . 1. Wick material, 3. Lubricant, 5.
..... Foamed particles, 7..... Oil supply composition, 10
, 30, 34, 35...Bearing, 11...
...End shield, 12...Shaft,
14...End cap, 15...Cover, 16...Bearing chamber, 19...°°
- Wick, 20... Window, 21... Oil drainer, 31... Foundation, 32... Motor,
36... Weight, 40... Wheel, 41...
... Frame, 42 ... Oil scraper, 4
4... Test unit, 45... Wiper, 46... Tube, 48... Felt core,
49... Coil group.

Claims (1)

[Claims] 1 Most of the particles are approximately 20 to 80 mesh in size,
capable of releasing a liquid lubricant characterized by comprising a collection of discrete, non-fibrous, multi-branched, elastic polymeric foam particles, the remaining particles having a size of about 5 to 200 meshes. Lubricant-retaining wick material to hold it in place.