KR970003254B1 - Control mechanism of bearing system - Google Patents

Abstract

None.

Description

Feeding amount control device of bearing part

1 is a longitudinal side view showing an embodiment of a feed amount control apparatus of a bearing unit of the present invention.

Figure 2 is a longitudinal side view showing a conventional concrete pump.

3 is a longitudinal sectional front view taken along the line A-A of FIG.

4 is an enlarged longitudinal sectional side view of the arrow C portion of FIG.

FIG. 5 is an enlarged vertical sectional side view of the arrow D in FIG. 2. FIG.

* Explanation of symbols for main parts of the drawings

5: stirring shaft 11: bearing

12: seal box 13: seal

14: bearing bush 15: feed hole

16: feeding pulp 17: feeding tank

18: relief valve 19: detector

20: controller 21: feed point (grease seal)

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a feed amount control device applied to a bearing portion of a high viscosity fluid pressure pump, for example, a concrete pump or a mortar pump.

The conventional concrete pump is explained with reference to FIGS. 2 to 5, in FIGS. 2 and 3, where (1) is a concrete hopper, (2) is a pair of concrete cylinders, and (3) is the same angle. The concrete piston of the concrete cylinder (2), (4) rocking pipe oscillating in the direction of the arrow of Fig. 3 around the axis BB, (5) to agitate the fresh concrete (high viscosity fluid) in the concrete hopper (1) Stirring shaft.

4 is an enlarged view of the C portion (the swing tube 4 is one bearing portion) of FIG. 2, and the bearing bush (7) rotatably supports the discharge end of the swing tube 4, Seals (8) and (9) in contact with the outer circumferential surface of the discharging end of the copper oscillation pipe (4), (6) a bearing housing for supporting these bearing bushes (7), seals (8), (9), (10) is a paper feed port formed in the bearing housing (6). In addition, C 'part (the bearing part of the other side of the oscillation pipe 4) of FIG. 2 is comprised similarly.

5 shows an enlarged view of the D portion (one bearing portion of the stirring shaft 5) of FIG. 3, wherein (11) is a bearing for rotatably supporting one end of the stirring shaft 5, (14) Bearing bushing attached to the stirring shaft 5, seal 13 attaching to the copper bearing bush 14, seal box 12 supporting the seal 13, box 15 simultaneously. It is a paper feed hole formed in). Moreover, D 'part (the bearing part of the other side of the stirring shaft 5) of FIG. 3 is comprised similarly.

In the conventional concrete pumps shown in Figs. 2 to 5, when the lip faces of the seals 8, 9, and 13 are worn out by cement paste, the cement paste is caused by the bearing bush 7 and the swing pipe. It penetrates into and adheres to (4) and adheres to the bearing 11, and the life of the bearing bush 7 and the bearing 11 is reduced rapidly. For this reason, the grid is forcibly supplied from the paper feed ports 10 and 15 into the bearing housing 6 and into the seal box 12, and is sealed therein, so that the seals 8, 9 and the bearing bush ( 7), 14, and bearing 15 are prevented from being worn.

In the conventional concrete pump shown in Figs. 2 to 5, grease is forcibly supplied from the paper feed ports 10 and 15 into the bearing housing 6 and into the seal box 12, and sealed therein. In order to prevent wear of the seals 8, 9, 13, bearing bushes 7, 14, and bearing 11, the seals 8, 9, 13, When the lip surface wears out by the cement paste and the cement paste penetrates into the bearing housing 6 and into the seal box 12, the concentration of the cement paste becomes higher than that of the grease, so that the seals 8, 9, ( 13) insufficient supply of grease to the lip face, wear of seals (8), (9), (13), wear of bearing bushes (7), (14), bearing (11), fixation of cement paste, There has been a problem that it is necessary to frequently change the swing tube 4, the stirring shaft 5, the bearing bushes 7, 14, the bearing 11, and the like, by advancing the resistance of the soccer power.

SUMMARY OF THE INVENTION The present invention is proposed in view of the above problems, and its object is to extend the life of the seal and the bearing portion, to reduce the frequency of exchange, and to increase the soccer power by fixing the high-viscosity fluid. It is an object of the present invention to provide a feed amount control device for a bearing unit capable of preventing the occurrence of oil.

In order to achieve the above object, the feeding amount control device of the bearing portion of the present invention is in contact with the high-viscosity fluid, the axis for rotating, swinging, reciprocating motion, the bearing for supporting the coaxial, and the bearing of the high-viscosity fluid A seal which prevents the intrusion of water, a feeding pump for lubricating the bearings and seals by feeding them to the bearings and seal feeding points, a detector for detecting the ingress of high-viscosity fluids into the feeding points, and a copper detector And a controller for controlling at least one of the discharge amount and the discharge pressure of the paper feed pump in accordance with the amount of the high viscosity fluid.

The feeding amount control device of the bearing part of the present invention is configured as described above, and detects the high viscosity fluid concentration at the feeding point by a detector, sends a detection signal obtained at that time to the controller, and sends the control signal obtained to the feeding pump. have. In this state, if the intrusion amount from the seal lip surface of the highly viscous fluid to the feed point is small, the feed amount of grease from the feed pump to the feed point is reduced, and the seal face and bearing of the highly viscous fluid are reduced. If the amount of intrusion into the feed point from the bush is large, increase the grease feed amount from the feed pump to the feed point to suppress the invasion of high viscosity fluid into the feed point, and keep the grease at the feed point always at the proper concentration. This prevents wear of seals, bearing bushes, and bearings caused by highly viscous fluids.

Next, according to the embodiment shown in FIG. 1 in which the feeding amount control device of the bearing portion is applied to the concrete pump in the present invention, (5) is capable of rotating the stirring shaft and (11) is capable of rotating the stirring shaft 5. Bearings (14) mounted on the stirring shaft (5), seals (13) contacting the copper bearing bushes (14), seal boxes (12) supporting the seals (13), ( A paper feed port formed by 15 at the same time box 12 and 21 are grease encapsulation portions of the seal box 12.

16 is a variable capacity feeding pump, 17 is a feeding tank of the same variable capacity feeding pump 16, 18 is a relief valve and 19 is a pH detector mounted on the seal box 12. The tip of the pH probe 19 is located in the grease encapsulation 21. 20 is a controller connected to the same pH detector 19, and the controller 20 is the discharge amount (or the discharge capacity of the variable displacement pump 16 according to the amount of cement paste detected by the pH detector 19). Discharge pressure).

Next, the operation of the feeding amount control device of the bearing portion shown in FIG. 1 will be described in detail.

The pH detector 19 detects the cement paste concentration of the grease seal portion 21 of the seal box 12, sends the obtained detection signal to the controller 20, and sends the control signal obtained here to the variable displacement pump 16. To control the discharge amount (or discharge pressure) of the variable displacement pump 16.

In this state, if the amount of intrusion into the grease encapsulation 21 from the seal 13 lip surface of the cement paste and the bearing bush 14 is small, the grease feed from the variable capacity feed pump 16 to the grease encapsulation 21 is performed. If the amount is small and the amount of penetration of the cement paste from the seal 13 lip surface and the bearing bush 14 to the grease encapsulation part 21 is large, the grease from the variable capacity feed pump 16 to the grease encapsulation part 21 is reduced. Increasing the amount of feed of the paste prevents the penetration of the cement paste into the grease encapsulation 21, maintains the grease of the grease encapsulation 21 at an appropriate concentration at all times, and seals the seal 13 and the bearing bush 14 with the cement paste. ), To prevent wear of the bearing (11) and the like.

The feeding amount control device of the bearing portion of the present invention detects the high viscosity fluid concentration at the feeding point by the detector as described above, sends the detection signal obtained at that time to the controller, and sends the control signal obtained here to the feeding pump. In this state, if the intrusion amount from the seal lip surface of the highly viscous fluid to the feed point is small, the discharge amount or discharge pressure of the grease from the feed pump to the feed point is reduced, and the seal face and bearing of the high viscosity fluid are reduced. If the amount of intrusion into the feed point from the bush is large, the discharge amount or discharge pressure of the grease from the feed pump to the feed point is increased to suppress the invasion amount of the high-viscosity fluid to the feed point, and always the grease at the feed point is always appropriate. It maintains its concentration to prevent wear of seals, bearing bushes, and bearings caused by highly viscous fluids. As a result, the service life of the seal and the bearing portion can be extended, the exchange frequency can be reduced, and the increase in soccer power due to the sticking of the highly viscous fluid can be prevented.

Claims (1)

A shaft which rotates, oscillates or reciprocates in contact with the highly viscous fluid, a bearing that supports the coaxial shaft, a seal that prevents the ingress of the highly viscous fluid into the bearing, and feeds the bearing and the seal feeding point to the shaft At least one of the discharge amount and discharge pressure of the feed pump according to a feeding pump for lubricating bearings and seals, a detector for detecting a high viscosity fluid invading the feed location, and a high viscosity fluid detected by the copper detector. Feeding amount control device of the bearing portion, characterized in that it comprises a controller for controlling the.