Improved structure of roller crusher
By setting the axial clearance between the fixed and movable bearing seats in the roller crusher, the problem of increasing rotation resistance at high temperatures is solved, and low energy consumption and low failure rate is achieved, which extends the equipment life and improves production efficiency.
Patent Information
- Application Number
- CN202421823510.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-07-31
AI Technical Summary
When the roller crusher runs at high temperature, the rotation resistance increases, the bearing wears severely, and the motor load increases, resulting in increased energy consumption and high failure rate, affecting the stable operation of the production line.
A roller crusher structure is designed, in which an axial gap is reserved between the fixed bearing seat near the transmission side of the motor and the movable bearing seat at the other end. The bearing and the roller shaft are fixed by a locking sleeve. The non-transmission side bearing can move within the movable bearing seat to avoid an increase in resistance caused by thermal expansion and contraction.
It realizes smooth operation of the crusher under high temperature conditions, extends the service life of the bearings and motors, reduces energy consumption and failure rate, and improves production efficiency.
Smart Images
Figure CN223263906U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of crushing rollers, in particular to an improved structure of a roller crusher. Background Art
[0002] In cement production lines, the primary function of the crusher is to crush cement clinker. Currently, most crushers used in cement production lines are hammer crushers and roller crushers. Roller crushers rely on pairs of rollers rotating in opposite directions to compress the material. Roller crushers are increasingly being adopted by more cement plants due to their low noise, compact size, high crushing capacity, simple structure, long service life, and ease of maintenance. The clinker crushed by the crusher is in the form of lumps cooled by a cooler, with an inlet temperature of 100°C to 150°C. Over extended periods of operation, the internal temperature of the crusher gradually rises. In most roller crushers, this elevated temperature increases the rotational resistance of the crusher rollers, leading to severe bearing wear, increased motor load, and overload, resulting in increased energy consumption. This can ultimately damage the bearings and motor, impacting the operation of the entire production line. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide an improved structure of a roller crusher with reduced running resistance, low energy consumption and low failure rate in view of the above problems.
[0004] In order to solve the above technical problems, the technical solution provided by the utility model is: an improved structure of a roller crusher, including a combined reducer and a roller crushing shaft, the combined reducer drives the roller crushing shaft to rotate, and a fixed bearing seat and a movable bearing seat are respectively provided on the outer sides of the left and right ends of the roller crushing shaft, and bearings are provided between the fixed bearing seat and the movable bearing seat and the roller crushing shaft. The roller crushing shaft and the bearing are connected by a locking sleeve, and a gap is left between the movable bearing seat and the bearing at the right end of the roller crushing shaft, and a roller sleeve is provided on the outer side of the roller crushing shaft.
[0005] Furthermore, both ends of the roller crusher shaft are connected to the roller sleeve via connecting bolts.
[0006] Furthermore, the fixed bearing seat and the movable bearing seat both include a base and an end cover, a bearing is provided between the base and the end cover, the base and the end cover are connected by bolts, the inner surface of the base of the fixed bearing seat fits with the left end bearing, and a gap is left between the base of the movable bearing seat and the right end bearing.
[0007] Furthermore, a sealing ring is provided between the base and the end cover.
[0008] The advantages of this utility model compared with the prior art are:
[0009] The bearing is fixed in the bearing seat at one end close to the transmission side of the motor, and a certain gap is reserved for the axial positioning of the bearing in the bearing seat at the other end. The bearing and shaft are completely fixed by the locking sleeve, and the bearing on the non-transmission side can move a small amount inside the bearing seat. This structure avoids the increase in resistance of the crusher due to thermal expansion and contraction when the temperature changes, so that the crusher can always run smoothly for a long time, extending the service life of the bearing and motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a structural diagram of the present utility model.
[0011] Figure 2 It is a structural schematic diagram of the fixed bearing seat of the utility model.
[0012] Figure 3 It is a structural schematic diagram of the movable bearing seat of the utility model.
[0013] Description of the drawings: 1. Combined reducer, 2. Bearing, 3. Fixed bearing seat, 4. Roller sleeve, 5. Roller shaft, 6. Movable bearing seat, 7. Base, 8. Cover plate, 9. Sealing ring. DETAILED DESCRIPTION
[0014] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0015] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.
[0016] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0017] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0018] The present invention will now be further described with reference to the accompanying drawings.
[0019] Combined with attachment Figure 1-3 A fixed bearing seat 3 and a movable bearing seat 6 are respectively provided on the outer sides of the left and right ends of the roller crushing shaft 5. Bearings 2 are provided between the fixed bearing seat 3 and the movable bearing seat 6 and the roller crushing shaft 5. The roller crushing shaft 5 and the bearing 2 are connected by a locking sleeve. A gap is left between the movable bearing seat 6 and the bearing 2 at the right end of the roller crushing shaft 3. A roller sleeve 4 is provided on the outer side of the roller crushing shaft 3. The fixed bearing seat 3 and the movable bearing seat 6 both include a base 7 and an end cover 8. A bearing 2 is provided between the base 7 and the end cover 8. The base 7 and the end cover 8 are connected by bolts. The inner surface of the base 7 of the fixed bearing seat 3 fits with the left end bearing 2, and a gap is left between the base 7 of the movable bearing seat 6 and the right end bearing 2.
[0020] As the temperature inside the crusher rises, the roller crusher shaft 5 expands and stretches due to the heat, squeezing the bearing, resulting in large frictional resistance to the rotation of the bearing 2. The large resistance in turn causes the bearing temperature to rise, and the resistance continues to increase, creating a vicious cycle that causes high motor current noise, high bearing 2 temperature, and a high failure rate. This roller crusher structure uses a fixed bearing seat 3 near one end of the motor drive side and a movable bearing seat 6 at the other end to reserve a certain gap for axial positioning of the bearing 2. The bearing 2 and the roller crusher shaft 5 are completely fixed by a locking sleeve, and the non-drive side bearing 2 can move a small amount inside the movable bearing seat 6. This structure avoids the increase in the crusher's resistance due to thermal expansion and contraction when the temperature changes, allowing the crusher to operate stably for a long time, extending the service life of the bearing 2 and the motor, reducing energy consumption, avoiding losses caused by frequent maintenance and repairs, reducing production costs, and improving production efficiency.
[0021] The utility model and its embodiments are described in this disclosure. This description is not restrictive. The drawings show only one embodiment of the utility model, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this disclosure and, without departing from the purpose of the utility model, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the utility model.
Claims
1. An improved structure of a roller crusher, comprising a combined speed reducer (1) and a roller crushing shaft (5), wherein the combined speed reducer (1) drives the roller crushing shaft (5) to rotate, and is characterized in that: A fixed bearing seat (3) and a movable bearing seat (6) are respectively provided on the outer sides of the left and right ends of the roller crushing shaft (5); bearings (2) are provided between the fixed bearing seat (3) and the movable bearing seat (6) and the roller crushing shaft (5); the roller crushing shaft (5) and the bearings (2) are connected via a locking sleeve; a gap is left between the movable bearing seat (6) and the bearing (2) at the right end of the roller crushing shaft (5); and a roller sleeve (4) is provided on the outer side of the roller crushing shaft (5).
2. The improved structure of a roller crusher according to claim 1, characterized in that: Both ends of the roller crusher shaft (5) are connected to the roller sleeve (4) via connecting bolts.
3. The improved structure of a roller crusher according to claim 1, characterized in that: The fixed bearing seat (3) and the movable bearing seat (6) both include a base (7) and an end cover (8), a bearing (2) is provided between the base (7) and the end cover (8), the base (7) and the end cover (8) are connected by bolts, the inner surface of the base (7) of the fixed bearing seat (3) fits with the left end bearing (2), and a gap is left between the base (7) of the movable bearing seat (6) and the right end bearing (2).
4. The improved structure of a roller crusher according to claim 3, characterized in that: A sealing ring (9) is provided between the base (7) and the end cover (8).