RU2008594C1 - Rotary drum support - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: support has a common frame, housings with bearing rollers, thrust rollers, adjusting links, a hydraulic cylinder, adjusting stops and removable straps. When a housing moves down a bandage engages with the thrust roller, its stop acts on a switch. The fluid enters the hydraulic cylinder which rod begins to press on the axles. The housing rotated by hinges, adjusting links with a clutch rotates a second housing. When the bearing rollers reach the necessary angle of misalignment the stop presses the switch roller which generates a command to shut a pump off to exclude fluid flow from the hydraulic cylinder. The rollers remain in a misaligned position. EFFECT: improved structure. 4 cl, 6 dwg

Description

 The invention relates to industries that use rotary drums, for example, rotary kilns and drying drums in the cement industry.

 Known support of a rotary kiln, containing a frame with rails, support rollers movably mounted on rails by means of a pair of bearings placed in housings connected in pairs perpendicular to the axis of the furnace by rods of adjustable length, rods are made in the form of rods with threaded ends interconnected by a threaded sleeve and the opposite ends of the rods are connected to the bearing housings by means of flat joints, the axis of rotation of which are perpendicular to the plane of the guide frames [1].

 The disadvantage of this support is the inability to control the movement of the rotary kiln body in the axial direction.

 A support device of a rotary kiln is known, comprising support rollers with bearings housed in housings mounted on a common frame using guides and hydraulic cylinders, the working chambers of which are connected to a hydraulic accumulator, hydraulic cylinders are connected at opposite ends to opposite bearing housings [2].

 The disadvantage of this support is also the inability to control the movement of the rotary kiln body in the axial direction.

 Closest to the technical nature of the proposed support is a device for axial movement of the body of a rotary kiln, containing support and thrust rollers placed on a common support frame [3].

 The disadvantage of this device is the need to overcome significant effort thrust rollers during axial movement of the furnace.

 The aim of the invention is to increase the reliability of the support by reducing the load on the thrust rollers and ensuring self-regulation of the axial movement of the rotating drum by means of self-adjusting skew of the support rollers.

 The goal is achieved in that the support rollers are installed in the housings, in the center of each housing there is a hole in which an axis is inserted, and the thrust rollers are spring loaded and placed on a common frame with the possibility of axial movement, while the casters of the support rollers are pivotally interconnected by adjustable rods with a coupling , a hydraulic cylinder is mounted on a common frame, interacting with one of the casters of the support rollers and connected to the control station.

 To ensure the movement of the support rollers in the transverse direction relative to the axis of the rotating drum, intermediate plates are installed on the common frame, in each of which an axis is fixed that passes through the hole in the housing of the support roller.

 To increase the durability of the support, the holes in the casters of the support rollers are equipped with removable bushings through which the axes pass, and the housings are equipped with interchangeable overlays interacting with the plates of the intermediate plate or common frame.

 To reduce the load on the hydraulic cylinder, it interacts with the housing of the support roller through a pushing mechanism.

 In FIG. 1 shows a support, a top view (option 1); in FIG. 2 is a view A in FIG. 1; in FIG. 3 is a view B in FIG. 1; in FIG. 4 - node T in FIG. 1; in FIG. 5 - support, top view (option 2); in FIG. 6 - the same, option 3.

 The support of the rotating drum contains a common frame 1 (Figs. 1-3, 5-6), on which housings 2 with support rollers are mounted 3. The common frame 1 is provided with axles 4, on which housings 2 are mounted with their central holes 5. Between the support rollers 3, a frame 6 is installed with guides 7 on which thrust rollers 8 and 9 are installed with springs 10 and 11 (Fig. 3).

The housing 2 of the support rollers 3 through the hinges 12 are interconnected by adjustable rods 13 with clutches 14,
On the common frame 1 (Fig. 1), a hydraulic cylinder 15 is fixed with a pipe 16 connected to a control station (not shown).

 Regulating stops 17 are also attached to the common frame 1, provided with bolts 18, which interact with the casings 2 of the support rollers 3.

 Between the common frame 1 and the housings 2 can be installed intermediate plates 19 (Fig. 2). In this case, the axles 4 are mounted directly on the intermediate plates 19. In the housings 2, removable sleeves 20 are installed through which the axles 4 pass. In addition, the housings 2 have removable linings 21 interacting with the plates 22 of the intermediate plate 19. In this case, the stops 17 s bolts 18 are mounted directly on the intermediate plates 19, and on the common frame 1 fixed stops 23 with screws 24.

 In the common frame, bolts 25 are installed, passing through the grooves 26 of the intermediate plates 19. At the free ends of the bolts 25 washers 27 and nuts 28 are installed.

 In the intermediate plates 19, studs 29 are installed, at the free ends of which nuts 30 are screwed.

 Thrust rollers 8 and 9 are equipped with stops 31 and 32, next to which switches 33 and 34 are installed, and one of the casings 2 has a stop 35, opposite which a switch 36 is installed.

 The hydraulic cylinder 15 is equipped with a rod 37, on which, if necessary, U-shaped plates 38 are installed.

 The axis 4 in the housing 2 fits the hole 39.

 On the support rollers 3 rests the band 40 of the housing 41 of the rotating drum.

 The emphasis 35 (Fig. 4) has a bolt 42 interacting with the roller 43 of the switch 36.

 When performing the support of the rotating drum according to option 2 (Fig. 5), a hinge 44 is fixed on the common frame 1, the pin 45 of which is connected to the hydraulic cylinder 15. The rod 37 of the hydraulic cylinder 15 is connected through the finger 46 to the unequal lever 47 mounted on the axis 48 in the common frame 1 The short arm 49 of the unequal arm 47 interacts with the housing 2. On the unequal arm 47 there is also a stop 50, opposite which the switch 36 is mounted.

 When performing the support of the rotating drum according to option 3 (Fig. 6), a stop 51 is fixed on the common frame 1. There are eyes 52 on the body 2, between which the roller 54 is mounted on the axis 53. A wedge 55 is placed between the roller 54 and the stop 51, which interacts with the roller 54, and with its rollers 56 on the axles 57, it interacts with the stop 51.

 The wedge 55 has a rolling pin 58 passing through the guides 59, rigidly fixed to a common frame 1, and is connected at one end by a hinge 60 to the rod 37 of the hydraulic cylinder 15.

 The rod 37 has a stop 61, opposite which is placed the switch 36.

 The support of the rotating drum operates as follows.

 During rotation of the housing 41 (Fig. 1), the bandage 40 rotates on the support rollers 3 fixed in the housings 2. Previously, the housing 2, resting on a common frame or on an intermediate plate 19 (Fig. 2), is slightly rotated relative to the axis of rotation of the housing 41 β. Such a rotation of the support rollers 3 is possible due to the presence of central holes 5 and axis 4. The angle of the preliminary rotation β must be such that when the rotating drum is in operation, its housing 41 can slowly lower along the axis of rotation. When moving the housing 41 downward, the bandage 40 comes into contact with the thrust roller 9, moving it on the guides 7 of the frame 6 and overcoming the resistance of the spring 11 (Fig. 3).

 When the thrust roller 9 (Fig. 1) passes a predetermined path, its stop 31 acts on the switch 33, when triggered, a signal is received to turn on the hydraulic pump of the control station. From the control station, the liquid under pressure through the pipeline 16 enters the hydraulic cylinder 15, the rod 37 of which begins to press on the axis 4, thereby increasing the angle β.

 Turning, the housing 2 by means of hinges 12, adjustable rods 13 with the clutch 14 simultaneously rotates the second housing 2. At the same time, the support rollers 3 are rotated together with the housings 2.

 When the support rollers 3 reach the required skew angle (greater than β), the stop 35 (Fig. 1 and 4) with a bolt 42 (Fig. 4) presses on the roller 43 of the switch 36 (Fig. 1 and 4), which, when triggered, sends a command to the control station to stop the pump and shut off the pipe 16 (Fig. 1) in order to prevent leakage of fluid from the hydraulic cylinder 15. Thus, the rollers 3 remain in a skewed position. Moreover, the angle of this skew can be changed with a bolt 42 (Fig. 4), increasing or decreasing the distance between it and the roller 43 of the switch 36.

 With an increased angle β, the bandage 40 (Fig. 1) together with the housing 41 will move up. Gradually, he comes out of contact with the thrust roller 9, which under the influence of the spring 11 (Fig. 3) returns to its original position.

 With further lifting of the housing 41, the bandage 40 (FIGS. 1 and 3) comes into contact with the thrust roller 8, which moves overcoming the action of the spring 10 (FIG. 3). In this case, the stop 32 (Fig. 1) acts on the switch 34, when triggered, a signal is sent to the control station to slowly drain the liquid from the hydraulic cylinder 15. In this case, under the influence of the mass of the housing with the material, the band 40 will move down, while reducing the skew of the support rollers 3 to angle β, and the stop roller 8 will return to its original position. Then the working cycle will be repeated.

 Stops 17 using screws 18 set the initial angle β. The stop 17 is safety and limits the maximum amount of skew of the support rollers 3.

 Through the lubricating holes 39, the joint of the axis 4 with the hole 5 is lubricated.

 The initial angle β (Fig. 1) is set by a set of U-shaped plates 38.

 The clutch 14 serves to ensure the parallelism of the axes of the support rollers 3.

 During installation, as well as during repair work, often the movement of the support rollers 3 (Fig. 2) to the axis of the rotating drum or from it is required. This is done as follows.

 The support rollers 3 (Fig. 1) using the clutch 14 are set in parallel, turning on the axes 4 (Fig. 1 and 2). Then, with loose nuts 28 (Fig. 2), the screws 24 in the stops 23 move the intermediate plates 19 to the axis or from the axis of the housing 41 (Fig. 1). This movement is facilitated by the grooves 26 (Fig. 2) through which the bolts 25 of the common frame 1 pass. After setting the axis of the support rollers 3 to the required position using the nuts 28 and the washer 27, the intermediate plates are tightly pressed against the common frame 1. For normal operation of the nut support 30 on the studs 29 should be slightly loosened to prevent the bodies 2 from biting when turning.

 Replaceable sleeve 20 extends the life of the housing 2. Replaceable linings 21, interacting with the plates 22, also extend the life of the housing 2, and the plates 22 increase the service life of the intermediate plates 19.

 The support of the rotating drum according to option 2 (Fig. 5) works as follows.

 When the housing 41 with the bandage 40 rotates, the latter rotates the support rollers 3 mounted at an angle β. When moving the housing 41 downward, the bandage 40 comes into contact with the thrust roller 9, moving it, and the stop 31 acts on the switch 33. The fluid is supplied to the hydraulic cylinder 15. In it, the rod 37 begins to move and through the finger 46 turns the unequal lever 47 on the axis 48, which with its short shoulder 49 presses on the housing 2, turning it. In this case, the hinge 44 with the finger 45 and the finger 46 protect the hydraulic cylinder 15 from breaking, allowing it to swing. When you turn the unequal lever 47, he presses on the switch 36, giving the command to stop the flow of fluid into the hydraulic cylinder 15.

 Further work proceeds as described above.

 The support of the rotating drum according to option 3 (Fig. 6) works as follows.

 When you turn on the switch 33 (Fig. 1 and 5) and supply fluid to the hydraulic cylinder 15 (Fig. 6), the rod 37 through the hinge 60 moves the wedge 55 on the rolling pins 58 in the guides 59. In this case, the wedge 55, moving on rollers 56 along the stop 51, presses on the roller 54 and through the axis 53 and the eyes 52 on the housing 2 of the support roller 3, turning it.

 The rollers 56 in this case rotate on the axes 57. When the stop 61 is pressed on the switch 36, the fluid supply to the hydraulic cylinder 15 is stopped.

 In the considered options 2 and 3, the unequal arm 47 (Fig. 5) and the wedge 55 (Fig. 6) are embodiments of the pushing mechanism and can reduce the load on the hydraulic cylinder 15, and therefore its dimensions. In addition, the use of a pushing mechanism can reduce the force required for the skew of the support rollers 3, and increase the stroke length of the rod 37, especially with the wedge version. This allows you to increase the rotation time of the support rollers 3 and ensures smooth rotation, which favorably affects the reliability of the support as a whole.

 Thus, the use of this invention allows to reduce the load on the thrust rollers and provides self-regulation of the axial movement of the rotating drum by self-adjusting the skew of the support rollers. (56) 1. USSR author's certificate N 976249, cl. F 27 B 7/22, 1981.

 2. USSR author's certificate N 1035381, cl. F 27 B 7/22, 1982.

 3. Copyright certificate of the USSR N 1551949, cl. F 27 B 7/22, 1988.

Claims (4)

 1. ROTARY DRUM SUPPORT, comprising a common support frame and support and support rollers placed on it and a hydraulic cylinder connected to the control station, characterized in that the support rollers are provided with housings with central holes in which the axes are installed, the housings are pivotally connected to each other by adjustable rods with the coupling and one of them is installed with the possibility of interaction with the hydraulic cylinder, and the thrust rollers are spring-loaded and placed with the possibility of axial movement.  2. A support according to claim 1, characterized in that it is provided with intermediate plates located between the common frame and the bodies, on which the axles are fixed.  3. The support according to claim 1, characterized in that it is equipped with removable bushings installed in the openings of the housings and interchangeable plates located in the housings, interacting with the plates of the intermediate plate or common frame.  4. Support according to paragraphs. 1 to 3, characterized in that it is equipped with a pushing mechanism connected to the rod of the hydraulic cylinder.

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