Hydraulic device for roller press

Abstract

The utility model relates to the field of grinding roller presses for cement crushing, in particular to a hydraulic device for a roller press. The device specifically comprises a rack, a fixed roller bearing seat and a floating roller bearing seat are arranged on the rack, a double-acting hydraulic cylinder is further connected to one end of the rack, mounting cavities are formed in the two ends of the double-acting hydraulic cylinder respectively, radial spherical plain bearings are embedded in the mounting cavities respectively, one end of the hydraulic cylinder is connected to the floating roller bearing seat through a pin shaft A, and the other end of the hydraulic cylinder is connected to the floating roller bearing seat through a pin shaft B. And the other end of the hydraulic cylinder is connected with the rack through a pin shaft B. The hydraulic cylinder has the advantages that the mounting cavity is formed in the hydraulic cylinder, the radial spherical plain bearing is embedded in the mounting cavity, and the inclination angle can be adjusted to be 3-15 degrees in the radial direction of the hydraulic cylinder under the adjustment of the pin shaft, so that the load cannot be directly applied to the pin shaft or a piston of the hydraulic cylinder, the abrasion of movable parts can be reduced, and the service life of the hydraulic cylinder is prolonged. The service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of grinding roller presses for cement crushing, in particular to a hydraulic device for roller presses. Background Art

[0002] As a pre-grinding equipment for cement production, roller press can greatly increase the output of cement mill and become the preferred mechanical equipment in the modern dry cement grinding system. The roller press realizes the extrusion and crushing of large particles by the synchronous rotation of the fixed roller and the floating roller. The required extrusion and crushing force is provided by the hydraulic system, and the performance of the hydraulic system directly affects the quality of the extruded and crushed materials and the safety of equipment operation; the hydraulic system is mainly composed of double-acting hydraulic cylinders, hydraulic oil stations, accumulators and other related valve body components. In use, one end of the double-acting hydraulic cylinder is fixedly connected to the frame, and the other end is connected to the floating roller. When the material is uneven, the roller gap is offset. Under the driving action of the hydraulic cylinder, the floating roller can be restored to a state parallel to the fixed roller axis, so as to continue the roller pressing work.

[0003] Traditional double-acting hydraulic cylinders can only play an effective regulatory role in the axial direction of the hydraulic cylinder, and cannot effectively adjust the radial load or deflection. The connecting holes, pistons and pins at both ends of the hydraulic cylinder often wear or even damage, making them unusable.

[0004] Therefore, those skilled in the art are in urgent need of providing a hydraulic device that can adjust the radial direction of the hydraulic cylinder to avoid wear problems on the hydraulic cylinder and connecting parts. Utility Model Content

[0005] The purpose of the utility model is to provide a hydraulic device for a roller press, which can effectively solve the technical problems in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model discloses a hydraulic device for a roller press, comprising a frame, a fixed roller bearing seat and a floating roller bearing seat are arranged on the frame, a double-acting hydraulic cylinder is connected to one end of the frame, mounting cavities are arranged at both ends of the double-acting hydraulic cylinder, radial spherical bearings are respectively embedded in the mounting cavities, one end of the hydraulic cylinder is connected to the floating roller bearing seat through a pin shaft A, and the other end of the hydraulic cylinder is connected to the frame through a pin shaft B.

[0008] Furthermore, a hinged support is arranged on one side of the floating roller bearing seat, and the pin A is inserted into the radial spherical bearing and fixedly connected to the hinged support.

[0009] Furthermore, the radial spherical plain bearing can move in the radial direction of the hydraulic cylinder by an angle of 3° to 15°.

[0010] Furthermore, an end cover is provided on the outer side of the radial spherical plain bearing. The end cover is annular and has a plurality of fasteners evenly arranged on the end cover to fix the end cover on the hydraulic cylinder. The end cover limits the radial spherical plain bearing in the installation cavity.

[0011] Furthermore, the hydraulic device also includes a hydraulic oil station and an accumulator; wherein the hydraulic oil station, the accumulator and the hydraulic cylinder are all components of the hydraulic system: the hydraulic oil station provides a hydraulic source for the hydraulic system, the hydraulic cylinder is an actuator of the hydraulic system, the accumulator is located between the hydraulic oil station and the hydraulic cylinder, and is connected to the hydraulic oil station and the hydraulic cylinder respectively through solenoid valves. The accumulator absorbs stored energy when the pressure of the hydraulic system is high, and releases the stored energy when the hydraulic system needs it, thereby ensuring the stable operation of the hydraulic system.

[0012] The advantages of the utility model are as follows: the hydraulic device of the utility model, by arranging installation cavities at both ends of the hydraulic cylinder, and respectively embedding radial spherical bearings in the installation cavities, when the particle size of the material is large or other reasons cause the floating roller and the hydraulic cylinder to deviate in the axial direction at an angle, the radial spherical bearings can respond at the same time, and quickly play an adjusting role in the radial direction of the hydraulic cylinder, so that the floating roller can be restored to a parallel state with the fixed roller in the shortest time, and the quality of the crushed material is not affected under the condition of ensuring that sufficient pressure is provided for extrusion; moreover, in the case of the floating roller and the hydraulic cylinder deviating at an angle, under the adjustment of the radial spherical bearings, the inclination angle can be adjusted to 3° to 15°, and the load will not be directly applied to the pin shaft or the hydraulic cylinder piston, which can reduce the wear of the movable parts and extend the service life of the equipment.

[0013] The hydraulic device can make large materials pass smoothly while the accumulator is working. Under the premise of ensuring the output, it can effectively reduce the vibration of the equipment and slow down the wear of the grinding roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the hydraulic cylinder of the utility model;

[0016] Figure 3 This is a schematic diagram of a cross-section of a hydraulic cylinder of the utility model;

[0017] In the figure:

[0018] 1. Frame 2. Fixed roller bearing seat 3. Floating roller bearing seat

[0019] 4. Articulated support 5. Pin A 6. Double-acting hydraulic cylinder

[0020] 7. Radial spherical plain bearing 8. End cover 9. Fasteners Specific embodiments

[0021] A hydraulic device for a roller press comprises a frame 1, a fixed roller bearing seat 2 and a floating roller bearing seat 3 are respectively arranged on the side of the frame 1, and a hydraulic system is also connected to one end of the frame 1, the hydraulic system comprises a double-acting hydraulic cylinder 6, a hydraulic oil station and an accumulator, wherein installation cavities are respectively arranged at both ends of the double-acting hydraulic cylinder 6, and radial joint shafts 7 are respectively embedded in the installation cavities, and a pin shaft A5 is inserted into the radial joint bearing 7 and fixedly connected with an articulated support 4, and the articulated support 4 is fixed on one side of the floating roller bearing seat 3, and the other end of the hydraulic cylinder is connected to the frame through a pin shaft B.

[0022] Among them, an end cover 8 is provided on the outside of the radial spherical plain bearing 7. The end cover 8 is annular. Eight fasteners 9 are evenly arranged on the end cover 8 to fix the end cover 8 on the hydraulic cylinder 6. The end cover 8 limits the radial spherical plain bearing 7 in the installation cavity.

[0023] During operation, the material is fed into the roller press from the feeding port between the fixed roller and the floating roller, and the large particles of the material are squeezed and crushed by the synchronous rotation of the fixed roller and the floating roller in the roller press. During the roller pressing process, when the material is not delivered evenly or the surface of the material is uneven, the roller gap between the fixed roller and the floating roller is offset, and the floating roller bearing seat 3 is driven by the connected hydraulic cylinder 6 to restore the floating roller to a state parallel to the fixed roller axis, so as to continue the roller pressing work; in the case of the deviation angle between the floating roller and the hydraulic cylinder, the inclination angle can be adjusted to 3°~15° by adjusting the radial spherical bearing 7, and the inclination angle can be avoided by directly applying the load to the pin shaft or the hydraulic cylinder piston, which can reduce the wear of the moving parts and extend the service life of the equipment.

[0024] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A hydraulic device for a roller press, characterized in that: It includes a frame, on which a fixed roller bearing seat and a floating roller bearing seat are arranged, and a double-acting hydraulic cylinder is connected to one end of the frame, and mounting cavities are respectively arranged at both ends of the double-acting hydraulic cylinder, and radial spherical bearings are respectively embedded in the mounting cavities, one end of the hydraulic cylinder is connected to the floating roller bearing seat through a pin shaft A, and the other end of the hydraulic cylinder is connected to the frame through a pin shaft B.

2. A hydraulic device for a roller press according to claim 1, characterized in that: A hinged support is arranged on one side of the floating roller bearing seat, and the pin A is inserted into the radial spherical bearing and fixedly connected with the hinged support.

3. A hydraulic device for a roller press according to claim 1 or 2, characterized in that: The radial spherical plain bearing can move at an angle of 3° to 15° in the radial direction of the hydraulic cylinder.

4. A hydraulic device for a roller press according to claim 3, characterized in that: An end cover is arranged outside the radial spherical plain bearing. The end cover is annular and has a plurality of fasteners evenly arranged on the end cover to fix the end cover on the hydraulic cylinder. The end cover limits the radial spherical plain bearing in the installation cavity.

5. A hydraulic device for a roller press according to claim 1, characterized in that: The hydraulic device also includes a hydraulic oil station and an accumulator.

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