JP5976870B1 - Elevator rope cleaning jig - Google Patents

Abstract

An elevator rope cleaning jig capable of suppressing vibration of a wire rope is provided. An elevator rope cleaning jig according to this embodiment includes a pair of bases, a plurality of rotating members, and a pair of roller members. The pair of foundations are installed so as to sandwich the plurality of wire ropes from both sides of the plurality of wire ropes to be cleaned. The plurality of rotating members have holes through which the wire ropes can pass, and rotate in contact with the pair of bases when the wire ropes pass through the holes. The pair of roller members are attached to the pair of bases, sandwich the wire ropes so as to suppress vibration of the wire ropes that have passed through the holes of the rotating members, and contact the wire ropes. Rotate. [Selection] Figure 2

Description

  Embodiments described herein relate generally to an elevator rope cleaning jig used for cleaning a wire rope.

  Generally, in an elevator, for example, by driving a hoisting machine on which a main rope that connects a car and a counterweight is wound, the car and the counterweight are moved up and down in opposite directions.

  A wire rope is used as the main rope in such an elevator. The wire rope is a rope formed by twisting a plurality of strands formed by twisting thin steel wires called strands around the fiber core in the center.

  By the way, when a wire rope is used for a long period of time, the grease contained in the wire rope may be precipitated, and the deposited grease may be hardened or dust may adhere to the elevator operation.

  For this reason, in order to prevent hardening of grease or adhesion of dust, maintenance such as periodically cleaning the wire rope is required.

  The wire rope is often cleaned manually by a worker using a scraper or a brush. However, such a manual cleaning operation requires a great deal of labor and time. Further, it is difficult to manually remove the grease clogged in the valley portions (between the strands) of the wire rope.

  Therefore, a rope cleaning jig for automating the cleaning of the wire rope has been considered. For example, a rope cleaning jig has been developed in which a member having a hole cut in the outer peripheral shape of a wire rope is attached to the wire rope and the member is rotated around the axis of the wire rope to scrape off the grease.

Japanese Patent No. 5427918

  A main rope in an elevator is generally composed of a plurality of wire ropes. When cleaning such a main rope using the rope cleaning jig described above, the member is rotated around the axis of each wire rope constituting the main rope.

  However, when a member is rotated around the axis of each wire rope, the wire rope may cause abnormal vibration due to the rotation, and the wire ropes may be entangled with each other.

  Then, the subject which this invention tends to solve is providing the rope cleaning jig | tool of an elevator which can suppress a vibration of a wire rope.

The rope cleaning jig for an elevator according to the present embodiment includes a pair of bases, a plurality of rotating members, and a pair of roller members. The pair of foundations are installed so as to sandwich the plurality of wire ropes from both sides of the plurality of wire ropes to be cleaned. The plurality of rotating members have holes through which the wire ropes can pass, and rotate in contact with the pair of bases when the wire ropes pass through the holes. The pair of roller members are attached to the pair of bases so as to be positioned below the plurality of rotating members , and each of the pair of roller members is configured to suppress vibrations of the wire ropes that have passed through the holes of the rotating members. While sandwiching the wire rope, it rotates in contact with each wire rope.

The figure for demonstrating an example of the installation position of the rope cleaning jig | tool of the elevator which concerns on embodiment. The perspective view which shows an example of the structure of a rope cleaning jig. The figure for demonstrating an example of the structure of a rotation member. The figure which shows the relationship between a rotation member and a spatula member. Sectional drawing of a rope cleaning jig. The figure for demonstrating an example of the structure of a damping roller. The figure which shows the state which connected the front jig | tool and the rear jig | tool. The figure which shows the state in which the rope cleaning jig was installed in the machine beam. The figure showing the state which the wire rope which passed the rope cleaning jig vibrated. The figure showing the state by which the vibration of the wire rope was suppressed by the damping roller. The figure showing the state by which the diffusion prevention member was attached to the upper part of a spatula member. The figure for demonstrating a rope draw. The figure which represents notionally the state in which a wire rope does not fit into the hole formed by connecting a foundation. The figure which shows the installation position of the rope cleaning jig in the case of cleaning a main rope between a winding machine and a counterweight.

Hereinafter, embodiments will be described with reference to the drawings.
An elevator rope cleaning jig (hereinafter simply referred to as a rope cleaning jig) according to the present embodiment is a jig used for cleaning a main rope composed of a plurality of wire ropes, for example. Each wire rope constituting the main rope is a rope formed by twisting a plurality of strands formed by twisting thin steel wires called strands around the fiber core at the center. .

  First, with reference to FIG. 1, the installation position of the rope cleaning jig of the elevator which concerns on this embodiment is demonstrated easily.

  In the elevator, the elevator control device 11 is installed in a machine room (not shown), for example, and performs operation control of the entire elevator including drive control of the hoisting machine 12. The hoisting machine 12 is supported on the machine beam 13 and is provided together with the elevator control device 11 in the machine room. A main sheave (traction sheave) 14 is attached to the drive shaft of the hoisting machine 12, and a main rope 15 is wound around the outer periphery of the main sheave 14. One end of the main rope 15 is connected to the car 16 and the other end is connected to a counterweight (C / W) 17.

  In FIG. 1, the main rope 15 is shown as a single rope for convenience, but the main rope 15 is composed of a plurality of wire ropes as described above. The plurality of wire ropes are coated with grease for lubrication or rust prevention.

  When the hoisting machine 12 is driven based on the control of the elevator controller 11, the main sheave 14 around which the main rope 15 is wound rotates, and the car 16 and the counterweight connected to the main rope 15. 17 moves up and down like a vine.

  A compen- sion rope 18 is connected to the bottoms of the car 16 and the counterweight 17 via a compensator 19. The compensation rope 18 is a rope for eliminating unbalance due to the weight of the main rope 15.

  As shown in FIG. 1, the rope cleaning jig 20 according to the present embodiment is used by being installed on a machine beam 13 directly under the hoisting machine 12. In the example shown in FIG. 1, the rope cleaning jig 20 is installed between the hoisting machine 12 and the car 16. For example, when the elevator is operated so that the car 16 descends, the rope cleaning jig 20 is moved upward. The main rope 15 passing from the bottom to the bottom is cleaned.

  Next, the structure of the rope cleaning jig 20 will be described with reference to FIGS. FIG. 2 is a perspective view showing the structure of the rope cleaning jig 20.

  As shown in FIG. 2, the rope cleaning jig 20 collects the plurality of wire ropes 15 a to 15 g from both sides of the plurality of wire ropes 15 a to 15 g (main rope 15 configured from). A pair of bases 201a and 201b are arranged so as to be sandwiched. The bases 201 a and 201 b are connected to each other to form a hole for allowing each of the wire ropes 15 a to 15 g to pass from the upper side to the lower side of the rope cleaning jig 20. The bases 201a and 201b are connected by a fastener 202 provided on the bases 201a and 201b.

  A plurality of rotating members 203a to 203g attached to the wire ropes 15a to 15g are arranged on the bases 201a and 201b. The rotating members 203a to 203g are used as grease removing members for removing the above-described grease from the wire ropes 15a to 15g.

  Here, the structure of the rotating members 203a to 203g will be described with reference to FIG. In FIG. 3, the structure of the rotating member 203a will be described for the sake of convenience, but the other rotating members 203b to 203g have the same structure.

  As shown in FIG. 3, the rotating member 203 a has a cylindrical shape, and has an engagement hole (hole portion) 301 that is punched in accordance with the uneven shape on the outer periphery of the wire rope 15 a at the center.

  The rotating member 203a is made of, for example, an elastic body such as urethane resin, and a notch 302 is formed between the engagement hole 301 and the outer periphery of the rotating member 203a. By opening the notch 302, the rotating member 203a is rotatably attached to the wire rope 15a.

  When the hoisting machine 12 is driven as described above with the rotating member 203a attached to the wire rope 15a, the wire rope 15a can pass through the engagement hole 301 of the rotating member 203a. After the rotating member 203a is attached to the wire rope 15a, in order to prevent the notch 302 from opening and the rotating member 203a from coming off the wire rope 15a, the notch 302 is fixed with a bolt (not shown) or the like. You may make it leave.

  The diameter d of the engagement hole 301 is substantially the same as the diameter of the wire rope 15a, and the engagement hole 301 is designed to be in close contact with the outer periphery of the wire rope 15a when the rotating member 203a is attached to the wire rope 15a. ing. According to such a structure, the rotating member 203a rotates along the twist of the wire rope 15a when the wire rope 15a passes through the engagement hole 301, and scrapes off the grease adhering to the wire rope 15a. (Can be removed).

  As shown in FIG. 2, the rotating members 203a to 203g are arranged side by side according to the arrangement of the wire ropes 15a to 15g. For this reason, the diameter D of the rotation member 203a shown in FIG. 3 shall be designed according to the space | interval between wire ropes 15a-15g. Specifically, the diameter D of the rotating member 203a is such that it does not come into contact with the adjacent rotating member 203b (that is, the rotating member 203b attached to the wire rope 15b adjacent to the wire rope 15a to which the rotating member 203a is attached). It is designed to be mounted with a gap (for example, several millimeters).

  Returning to FIG. 2 again, the grease scraped off by the rotating members 203a to 203g is removed (removed) from the rotating members 203a to 203g in the vicinity of the rotating members 203a to 203g on the upper surface of the base 201a. Spatula members (scrapers) 204a to 204g are attached using, for example, fixing bolts.

  A grease collecting member 205 having a U-shaped cross section, for example, is attached to the side surface of the base 201a using a fixing bolt or the like, and the spatula members 204a to 204g are formed between the rotating members 203a to 203g and the grease collecting member 205. Installed between. Thereby, the spatula members 204a to 204g remove grease from the rotation members 203a to 203g (the upper surface thereof) according to the rotation of the rotation members 203a to 203g, and flow the grease into the grease collection member 205.

  FIG. 4 shows the relationship between the rotating members 203a to 203g and the spatula members 204a to 204g in the rope cleaning jig 20. In FIG. 4, the relationship between the rotating member 203a and the spatula member 204a will be described for the sake of convenience, but the same applies to the relationship between each of the other rotating members 203b to 203g and each of the other spatula members 204b to 204g. .

  As shown in FIG. 4, the spatula member 204 a is interposed between the rotating member 203 a and the grease collecting member 205, removes the grease accumulated in the rotating member 203 a, and sends it to the grease collecting member 205. The spatula member 204a is attached so as to leave a slight gap (several millimeters) from the rotating member 203a so as not to disturb the rotation of the rotating member 203a.

  Returning to FIG. 2 again, in order to prevent the grease scraped off by the rotating members 203a to 203g from scattering near the rope cleaning jig 20, the rope cleaning jig 20 includes, for example, the rotating members 203a to 203g. A surrounding plate 206 is attached to the base 202b so as to enclose.

  FIG. 5 is a cross-sectional view taken along line VV of the rope cleaning jig 20 shown in FIG. As shown in FIG. 5, in the rope cleaning jig 20, vibration control rollers (roller members) 207 a and 207 b are positioned directly below the rotating members 203 a to 203 g (holes formed by the bases 201 a and 201 b). Are attached to the bases 201a and 201b. The damping rollers 207a and 207b sandwich the wire ropes 15a to 15g so as to suppress the vibrations of the wire ropes 15a to 15g that have passed through the engagement holes 301 included in the rotating members 203a to 203g. It rotates in contact with the ropes 15a to 15g. The vibration control rollers 207a and 207b are made of, for example, urethane resin. Further, the damping rollers 207a and 207b are attached to the bases 201a and 201b at different heights as shown in FIG.

  Moreover, as shown in FIG. 6, the damping rollers 207a and 207b have a plurality of grooves 208 for stably sandwiching the wire ropes 15a to 15g, respectively.

  Since FIG. 6 is used for explaining the damping rollers 207a and 207b, in FIG. 6, a part of the structure of the rope cleaning jig 20 described above is omitted for convenience.

  In the following description, the base 201a, the spatula members 204a to 204g, the grease collecting member 205, and the like are referred to as a front jig of the rope cleaning jig 20. On the other hand, the base 201b and the surrounding plate 206 are referred to as a rear jig of the rope cleaning jig 20.

  Next, an operation when the main rope 15 is cleaned using the rope cleaning jig 20 according to the present embodiment will be described.

  When cleaning the main rope 15 (a plurality of wire ropes 15 a to 15 g constituting the main rope 15), the car 16 is moved to the top floor, and the rope cleaning jig 20 is installed on the machine beam 13.

  In this case, for example, as shown in FIG. 7, the front jig is arranged so that the wire ropes 15 a to 15 g are positioned in the holes formed by the front jig and the rear jig (bases 201 a and 201 b). Then, the rear jig is placed on the machine beam 13 so as to be sandwiched from both sides of the wire ropes 15a to 15g, and the front jig and the rear jig are connected by the fasteners 202. Further, rotating members 203a to 203g are attached to the wire ropes 15a to 15g, respectively. For example, when it is difficult to attach the rotating members 203a to 203g to the wire ropes 15a to 15g with the spatula members 204a to 204g, the rotating members 203a to 203g are attached before connecting the front jig and the rear jig. You may do it. Thereby, the rope cleaning jig 20 is in the state shown in FIG. 2 described above, and the installation of the rope cleaning jig 20 is completed. FIG. 8 is a view showing a state in which the rope cleaning jig 20 is installed on the machine beam 13.

  After the rope cleaning jig 20 is thus installed, the elevator car 16 is operated. Specifically, the car 16 in the direction in which the rotating members 203a to 203g attached to the wire ropes 15a to 15g are pressed against the bases 201a and 201b of the rope cleaning jig 20 (that is, the direction from the top floor to the bottom floor). Move.

  Since the rope cleaning jig 20 is installed (placed) on the machine beam 13 as shown in FIG. 8, each of the wire ropes 15a to 15g is moved in accordance with the movement of the car 16 from the top floor to the bottom floor. Passes through the engagement hole 301 of each of the rotating members 203a to 203g attached to the wire ropes 15a to 15g. At this time, the rotating members 203a to 203g rotate in a state of being in contact (pressed) with the bases 201a and 201b of the rope cleaning jig 20. Since each of the rotating members 203a to 203g rotates in a state of being in close contact with the outer circumferences of the wire ropes 15a to 15g as described above, the grease attached to the wire ropes 15a to 15g is scraped off (scraped) while rotating. Can do.

  The grease scraped by the rotating members 203a to 203g accumulates on the upper surfaces of the rotating members 203a to 203g. As described above, since the spatula members 204a to 204g are attached in the vicinity of the rotating members 203a to 203g, the grease deposited on the upper surfaces of the rotating members 203a to 203g corresponds to the rotation of the rotating members 203a to 203g. The spatula members 204a to 204g are removed. The grease removed by the spatula members 204a to 204g is collected by the grease collecting member 205.

  Here, as shown in FIG. 9, the wire ropes 15 a to 15 g that have passed through the rope cleaning jig 20 (the engagement holes 301 included in the rotation members 203 a to 203 g) are rotated by the rotation members 203 a to 203 g during the passage. Abnormal vibration is caused depending on Such abnormal vibrations of the wire ropes 15a to 15g cause entanglement of the wire ropes 15a to 15g particularly in a portion where the deflection amount is large.

  On the other hand, in the present embodiment, the damping rollers 207a and 207b located immediately below the rotating members 203a to 203g sandwich the wire ropes 15a to 15g that have passed through the engagement holes 301 of the rotating members 203a to 203g. Rotate in contact with the wire ropes 15a to 15g.

  According to this, as shown in FIG. 10, the wire ropes 15 a to 15 g immediately after passing through the engagement holes 301 of the rotating members 203 a to 203 g vibrate, but the wire ropes 15 a to 15 g It is sent out from the damping rollers 207a and 207b in a state where the vibration is suppressed by the rollers 207a and 207b.

  After the car 16 moves from the top floor to the bottom floor with the rope cleaning jig 20 operating as described above, the rotating members 203a to 203g are removed from the wire ropes 15a to 15g, and the front part is cured. The rope cleaning jig 20 is removed from the machine beam 13 by releasing the connection between the tool and the rear jig. Thereby, cleaning of the main rope 15 is completed. In addition, what is necessary is just to discard the grease collect | recovered in the grease collection | recovery member 205. FIG.

  As described above, the rope cleaning jig 20 according to the present embodiment includes a pair of bases 201a disposed so as to sandwich the wire ropes 15a to 15g from both sides of the plurality of wire ropes 15a to 15g to be cleaned. 201b and an engagement hole (hole) 301 through which each of the wire ropes 15a to 15g can pass. When the wire ropes 15a to 15g pass through the engagement hole 301, they contact the bases 201a and 201b. A plurality of rotating members 203a to 203g that rotate in rotation, and the respective wire ropes 15a to 15g that are attached to the bases 201a and 201b and that have passed through the engagement holes 301 of the rotating members 203a to 203g. The wire ropes 15a to 15g are sandwiched and rotated in contact with the wire ropes 15a to 15g. Damping rollers and a (roller member) 207a and 207b. In this embodiment, with such a configuration, the vibration of the wire ropes 15a to 15g accompanying the rotation of the rotating members 203a to 203g is suppressed, and the vibration is applied to the wire ropes 15a to 15g below the damping rollers 207a and 207b. It is possible to prevent transmission. Therefore, in this embodiment, it is possible to prevent the wire ropes 15a to 15g from being entangled with each other when the rope cleaning jig 20 is used.

  In the present embodiment, the damping rollers 207a and 207b have a plurality of groove portions 208 for sandwiching the wire ropes 15a to 15g, so that the wire ropes 15a to 15g can be stably sandwiched. It becomes possible to suppress the vibration of the wire ropes 15a to 15g. Furthermore, the vibration control rollers 207a and 207b are attached to the bases 201a and 201b at different heights, respectively, so that the regions where the wire ropes 15a to 15g are in contact with the vibration control rollers 207a and 207b are increased. Therefore, it becomes possible to suppress vibration of the wire ropes 15a to 15g.

  In the present embodiment, when the wire ropes 15a to 15g pass through the engagement holes 301, the rotating members 203a to 203g rotate to remove (shave off) the grease attached to the wire ropes 15a to 15g. According to the configuration, it is possible to easily clean the plurality of wire ropes 15a to 15g only by moving the car 16 from the top floor to the bottom floor, for example, and the burden on the worker is greatly reduced. It enables cleaning in a short time of 15a to 15g.

  Further, in the present embodiment, the spatula members 204a to 204g for removing the grease removed by the rotating members 203a to 203g from the rotating members 203a to 203g and the grease removed by the spatula members 204a to 204g are collected. A grease collecting member 205. In the present embodiment, with such a configuration, after the main rope 15 (the plurality of wire ropes 15a to 15g constituting the main rope 15) is cleaned, it is only necessary to discard the grease collected in the grease collecting member 205. It is also possible to reduce the work load after cleaning the main rope 15.

  In the present embodiment, it is possible to remove the grease from the rotating members 203a to 203g by the above-described spatula members 204a to 204g, but when the amount of grease removed by the rotating members 203a to 203g is large. There is a possibility that the grease accumulated on the upper surfaces of the rotating members 203a to 203g diffuses beyond the spatula members 203a to 203g and adheres to other wire ropes. For this reason, as shown in FIG. 11, it is also possible to prevent the grease removed by the rotating members 203a to 203g from diffusing by attaching a diffusion preventing member 209 to the upper parts of the spatula members 204a to 204g. .

  Here, the arrangement direction (direction) of the plurality of wire ropes 15 a to 15 g in the portion wound around the main sheave 14 is a first direction, and the plurality of wire ropes 15 a in the portion connected to the car 16 is used. When the direction of arrangement of ˜15 g is the second direction, the second direction may be perpendicular to the first direction depending on the elevator. In this case, the wire ropes 15a to 15g from the main sheave 14 to the car 16 are in a twisted state as shown in FIG. When the car 16 is on the lowermost floor, the twist (tilt angle) of the wire ropes 15a to 15g is small, but as the car 16 moves to the uppermost floor, the twist (tilt angle) of the wire ropes 15a to 15g increases. . The phenomenon in which the wire ropes 15a to 15g shown in FIG. 12 are twisted is referred to as rope draw.

  As described above, when the main rope 15 is cleaned, the car 16 is moved to the uppermost floor, so that the wire ropes 15a to 15g are twisted most by the rope draw.

  In such a case, for example, if a rope cleaning jig that does not include the vibration damping rollers 207a and 207b is used, the wire ropes 15a to 15g are displaced (horizontal movement) by rope draw (twist) as shown in FIG. Therefore, the wire ropes 15a to 15g do not fit into the holes formed by connecting the bases 201a and 201b, and the rope cleaning jig cannot be installed. FIG. 13 is a diagram conceptually showing a state in which the wire ropes 15a to 15g are not adapted to the holes formed by the bases 201a and 201b. In this case, for example, if the position of the car 16 is lowered to a floor lower than the top floor and the twists of the wire ropes 15a to 15g are not loosened, the rope cleaning jig cannot be used and can be cleaned. The section of the main rope 15 is restricted.

  On the other hand, according to the rope cleaning jig 20 according to the present embodiment, the wire ropes 15a to 15g are sandwiched by the vibration control rollers 207a and 207b located immediately below the hole formed by the bases 201a and 201b. Therefore, the displacement of the wire ropes 15a to 15g due to the rope draw at the position of the hole formed by connecting the bases 201a and 201b can be eliminated. That is, in the present embodiment, it is possible to reduce the influence of the rope draw at the installation position of the rope cleaning jig 20 and achieve the effect of eliminating the restriction of the cleaning section.

  In the present embodiment, the rope cleaning jig 20 is described as cleaning the main rope 15 between the hoist 12 and the car 16 as shown in FIG. As shown in FIG. 14, the main rope 15 may be installed between the hoisting machine 12 and the counterweight 17. In this case, the main rope 15 can be similarly cleaned by moving the car 16 from the lowermost floor to the uppermost floor.

  Furthermore, in this embodiment, although demonstrated as what cleans the main rope 15 using the rope cleaning jig 20, you may clean the compensation rope 18 using the said rope cleaning jig 20. FIG.

  In addition, in the rope cleaning jig 20 according to the present embodiment, a rotation assist mechanism for assisting the rotation of the plurality of rotating members 203a to 203g may be provided. The rotation assist mechanism includes, for example, a ball and a support member that rotatably supports the ball. By providing such a rotation assist mechanism on the bases 201a and 201b so as to support each of the rotation members 203a to 203g mounted on the wire ropes 15a to 15g, the rotation members 203a to 203g are connected to the rotation assist mechanism. It can be smoothly rotated on the ball.

  In addition, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 11 ... Elevator control apparatus, 12 ... Hoisting machine, 13 ... Machine beam, 14 ... Main sheave, 15 ... Main rope, 15a-15g ... Wire rope, 16 ... Ride car, 17 ... Counterweight, 18 ... Compen rope, 19 ... Compensation, 20 ... Rope cleaning jig, 201a, 201b ... Base, 202 ... Fastener, 203a to 203g ... Rotating member, 204a to 204g ... Spatula member, 205 ... Grease recovery member, 206 ... Enclosure plate, 207a, 207b ... Damping roller, 208 ... Groove, 209 ... Diffusion prevention member, 301 ... Engagement hole, 302 ... Cut.

Claims (6)

A pair of foundations arranged to sandwich the plurality of wire ropes from both sides of the plurality of wire ropes to be cleaned;
A plurality of rotating members each having a hole through which each wire rope can pass and rotating in contact with the pair of bases when the wire rope passes through the hole;
The wire ropes are attached to the pair of bases so as to be positioned below the plurality of rotating members , sandwich the wire ropes so as to suppress vibration of the wire ropes that have passed through the holes of the rotating members, and An elevator rope cleaning jig, comprising: a pair of roller members rotating in contact with each wire rope.   The elevator rope cleaning jig according to claim 1, wherein the pair of roller members have a plurality of grooves for sandwiching the wire ropes.   The elevator rope cleaning jig according to claim 2, wherein the pair of roller members are attached to the pair of bases at different heights. The hole of each rotating member has a shape that is die-cut according to the concavo-convex shape on the outer periphery of each wire rope,
2. The elevator rope according to claim 1, wherein each rotating member removes grease adhered to the wire rope by rotating when each wire rope passes through a hole of the rotating member. Cleaning jig. A spatula member for removing the grease removed by each rotating member from the rotating member;
The elevator rope cleaning jig according to claim 4, further comprising: a grease collecting member that collects the grease removed by the spatula member.   The elevator rope cleaning jig according to claim 5, further comprising a diffusion preventing member attached to the spatula member and preventing diffusion of grease removed by each rotating member.

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