Multi-strand diamond wire saw machine guide wheel structure

Abstract

The application provides a multi-strand diamond wire saw guide wheel structure, which comprises a guide wheel shaft arranged in a guide wheel body, both ends of the guide wheel shaft are supported through guide wheel seats, two bearing seats are respectively arranged in end face holes at both ends of the guide wheel body, a bearing sleeve is arranged between the bearing and the guide wheel shaft, and the bearing sleeve is axially positioned on the guide wheel shaft through a locking screw; the outer circle of the bearing sleeve is tightly matched with the inner hole of the bearing, the inner and outer ends of the inner ring of the bearing are respectively positioned through the shaft shoulder of the bearing sleeve and locked through a lock nut; the outer circle of the bearing is tightly matched with the inner hole of the bearing seat, and the inner and outer ends of the outer ring of the bearing are respectively positioned through the inner hole of the bearing seat and pressed through a bearing cover. The multi-strand diamond wire saw guide wheel structure can avoid the end face dislocation of the inner and outer rings of the bearings at both ends of the guide wheel, effectively guarantees the assembly quality, and improves the service life of the bearings.

Description

Technical Field

[0001] This invention relates to the field of wire saw technology, specifically to a multi-strand diamond wire saw guide wheel structure. Background Technology

[0002] The use of multiple wire saws to process large stone slabs has become a mainstream processing method in recent years. To meet the demands of large-scale production, improve production efficiency, and reduce pollution and energy consumption, the number of sawing wires installed on wire saws is increasing. Existing wire saws can cut stone blocks up to 2.1 meters wide in a single pass, requiring the guide wheel of the wire saw to also be at least 2.1 meters wide. A wider guide wheel and a larger number of sawing wires increase the difficulty of installing and aligning the guide wheel with the guide wheel shaft, and significantly increase the load on the bearings. Therefore, a rational design of the guide wheel installation structure for multi-strand diamond wire saws is necessary to ensure effective operation of the guide wheels.

[0003] Most existing wire saw guide wheel systems adopt a structure with clamping and fixing at both ends, such as the attached... Figure 1 As shown, the guide wheel shaft 3' is fixed at both ends by guide wheel seats 5', and the bearing seats 2' are installed in the end holes of the guide wheel body 1' and rotate together with the guide wheel body 1'. The inner and outer rings of the bearing 4' are axially positioned by the shoulders of the guide wheel shaft 3' and the bearing seats 2', respectively. The bearing 4' is preferably a self-aligning roller bearing, which can withstand a large radial load.

[0004] In application, it was found that the span dimension L1 of the positioning surface for mounting bearing housing 2' on guide wheel body 1' is 1996mm, and the shoulder span dimension L2 of guide wheel shaft 3' is 1928mm. Both spans are very long, making it extremely difficult to control the machining accuracy within ±0.05mm. Furthermore, considering the accumulated error in the dimensions of bearing housing 2', precisely controlling the positioning of the inner and outer ring end faces of bearing 4' on the same surface is very challenging. If the inner and outer ring end faces of the bearing are misaligned, causing a decrease in clearance on one side and an increase in clearance on the other side between the tapered rolling element and the bearing's inner and outer rings, problems such as uneven bearing stress, severe wear and heat generation, and a drastically shortened bearing life will occur.

[0005] Faced with the aforementioned problem of misalignment between the inner and outer ring end faces of the bearing during assembly, workers had to repeatedly adjust the fit using shims. However, the thickness of the shims was difficult to control, which could not effectively guarantee assembly quality and was time-consuming and labor-intensive. Therefore, a multi-strand diamond wire saw guide wheel structure that can prevent misalignment between the inner and outer ring end faces of the bearing needs to be designed. Summary of the Invention

[0006] This invention provides a multi-strand diamond wire saw guide wheel structure that can prevent misalignment of the inner and outer ring end faces of the bearings at both ends of the guide wheel, effectively ensuring assembly quality and improving bearing service life.

[0007] To achieve the above-mentioned technical objectives and effects, the present invention solves the above-mentioned problems through the following technical solutions:

[0008] The multi-strand diamond wire saw guide wheel structure includes a guide wheel body, bearing housings, a guide wheel shaft, bearings, and guide wheel seats. The guide wheel shaft passes through the guide wheel body and is supported at both ends by the guide wheel seats. Two bearing housings are respectively installed in the end holes at both ends of the guide wheel body. The bearings are installed between the bearing housings and the guide wheel shaft. A bearing sleeve is provided between the bearings and the guide wheel shaft. The bearing sleeve is fitted onto the outer circumference of the guide wheel shaft and positioned by a set screw. The outer circle of the bearing sleeve fits tightly with the inner hole of the bearing. The inner and outer ends of the bearing inner ring are positioned by the bearing sleeve shoulder and locked by a lock nut. The lock nut is threaded into the outer circumference of the inner end of the bearing sleeve. The outer circle of the bearing fits tightly with the inner hole of the bearing housing. The inner and outer ends of the bearing outer ring are positioned by the bearing housing inner hole stop and pressed by the bearing cover. A labyrinth ring is provided between the bearing sleeve and the bearing housing for sealing.

[0009] In the above solution, a bearing sleeve is added between the bearing and the guide wheel shaft. The bearing sleeve can slide and adjust its position axially on the guide wheel shaft and is locked by a set screw. The inner and outer rings of the bearing are axially positioned by the bearing sleeve shoulder and the bearing housing inner hole shoulder, respectively. The position of the bearing sleeve shoulder can be adjusted with the bearing sleeve to achieve a coplanar position with the bearing housing inner hole shoulder. This structure ensures that the end faces of the inner and outer rings of the bearing are on the same plane during assembly, overcoming misalignment of the end faces of the inner and outer rings caused by machining errors and improving the bearing's service life.

[0010] Furthermore, a locking sleeve is provided inside the bearing sleeve to prevent the set screw from damaging the guide wheel shaft. The locking sleeve is composed of two semicircles joined together, and the set screws are two radially symmetrically arranged screws. The set screws are pressed against the locking sleeve, and the locking sleeve distributes the pressure evenly on its circumference, avoiding excessive local stress on the guide wheel shaft and preventing damage.

[0011] Large slab cutting requires a large amount of cooling water to wash and cool the wheel system, saw rope, and raw material. The acidic slurry formed when the cooling water mixes with the chips is extremely corrosive to the equipment. Since the bearings at both ends of the guide wheel are very close to the cooling slurry, the slurry can easily splash into the bearings. Simultaneously, the dense water mist formed when the coolant is heated will diffuse everywhere. If the bearing seal is not tight, the slurry mist can easily enter the bearing labyrinth rings and the bearing itself. After depositing and forming scale, it can cause the labyrinth seal rings to become stuck, leading to bearing corrosion and failure.

[0012] To address the aforementioned issues, a guide wheel sealing cover and a double-lip skeleton oil seal are provided at the outer end of the bearing housing to improve the sealing between the bearing housing and the bearing sleeve. The guide wheel sealing cover is sleeved on the bearing sleeve and threadedly connected to the bearing housing. The double-lip skeleton oil seal is located between the guide wheel sealing cover and the bearing sleeve.

[0013] Furthermore, a fluororubber skeleton oil seal is provided between the bearing housing and the bearing sleeve, and the double-lip skeleton oil seal, labyrinth ring, and fluororubber skeleton oil seal are arranged sequentially from the outside to the inside.

[0014] Furthermore, the sliding surface roughness of the double-lip skeleton oil seal and the fluororubber skeleton oil seal is greater than Ra0.8, and the surface is coated with grease; the labyrinth ring has no less than two rings.

[0015] Furthermore, the O-ring installed inside the bearing sleeve prevents moisture from entering.

[0016] To reduce bearing friction and heat generation and achieve circulating lubrication, the bearing sleeve has an axial oil inlet channel that connects to the bearing cavity, with a lubrication connector at the inlet. The bearing housing has an axial oil outlet channel, with the inlet end connected to a slot in the middle of the bearing outer ring and the outlet end connected to a one-way valve. The oil inlet and outlet channels are used to deliver high-temperature lithium-based grease, and the bearing cavity is filled with 1 / 2 to 3 / 4 of this grease.

[0017] The advantages and effects of this invention are:

[0018] 1. The present invention adds a bearing sleeve between the bearing and the guide wheel shaft. By controlling the axial position of the bearing sleeve, the bearing sleeve shoulder and the bearing seat inner hole shoulder are made coplanar, which can overcome the misalignment of the inner and outer ring end faces of the bearing caused by the machining error of the parts and improve the service life of the bearing.

[0019] 2. The design consists of a double-lip skeleton oil seal, a labyrinth ring, and a fluororubber skeleton oil seal arranged sequentially from the outside to the inside to provide multiple layers of protection for the bearing. This structure provides excellent protection against external moisture ingress and prevents the bearing's own grease from leaking out.

[0020] 3. The design incorporates a bearing lubrication circuit, which can be connected to an external lubrication device to achieve bearing lubrication circulation, ensuring good bearing lubrication, stable and reliable bearing performance, and further extending bearing service life. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the existing guide wheel system of a wire saw.

[0022] Figure 2 A schematic diagram of the guide wheel structure of the multi-strand diamond wire saw of the present invention;

[0023] Figure 3 for Figure 2 A magnified view of a section at point I;

[0024] Figure 4 for Figure 2 A magnified view of the vertical cross-section of the structure shown.

[0025] Part Number Identification: 1. Guide wheel body, 2. Bearing seat, 2-1. Oil outlet channel, 3. Guide wheel shaft, 4. Bearing, 5. Guide wheel seat, 6. Bearing sleeve, 6-1. Oil inlet channel, 7. Set screw, 8. Locking nut, 9. Bearing cover, 10. Locking sleeve, 11. Guide wheel sealing cover, 12. Double lip skeleton oil seal, 13. Fluororubber skeleton oil seal, 14. O-ring, 15. Lubrication joint, 16. Check valve. Detailed Implementation

[0026] The present invention will be further described below with reference to the embodiments, but the present invention is not limited to these embodiments.

[0027] The multi-strand diamond wire saw guide wheel structure described in this embodiment is as follows: Figure 2 , 3 As shown, the main body includes a guide wheel body 1, a bearing seat 2, a guide wheel shaft 3, a bearing 4, a guide wheel base 5, and a bearing sleeve 6. The guide wheel shaft 3 passes through the guide wheel body 1, and its two ends are fixedly supported by the guide wheel base 5. A set of bearing assemblies is symmetrically arranged on the end faces of both ends of the guide wheel body 1 to allow the guide wheel body 1 to be rotatably mounted on the guide wheel shaft 3. The bearing assembly includes a bearing seat 2 that is screwed onto the end faces of the guide wheel body 1. The inner hole of the bearing seat 2 tightly fits the outer circle of the bearing 4. The inner and outer ends of the outer ring of the bearing 4 are positioned by a shoulder in the inner hole of the bearing seat and pressed by a bearing cover 9. In this embodiment, the end closer to the guide wheel base 5 is the outer end, and the end away from the guide wheel base 5 is the inner end.

[0028] The bearing sleeve 6 is located between the bearing 4 and the guide wheel shaft 3. The bearing sleeve 6 is fitted onto the outer circumference of the guide wheel shaft 3 and is radially pressed against the guide wheel shaft 3 by the set screw 7 to achieve axial positioning. The outer circle of the bearing sleeve 6 fits tightly with the inner hole of the bearing 4. The inner and outer ends of the inner ring of the bearing 4 are positioned by the shoulder of the bearing sleeve 6 and locked by the lock nut 8. The lock nut 8 is threaded into the outer circumference of the bearing sleeve 6, and during installation, the lock nut 8 is located within the end hole of the guide wheel body 1. To prevent the set screw 7 from damaging the guide wheel shaft 3, the inner hole of the bearing sleeve 5 is provided with two semi-circular locking sleeves 10, and an annular groove is provided at the end of the inner hole of the bearing sleeve 5 for the locking sleeves 10 to be inserted. The locking sleeves 10 distribute the pressure on the circumferential surface, avoiding excessive local stress on the guide wheel shaft and subsequent damage. Simultaneously, the two set screws 7 are radially symmetrically arranged, providing opposing pressure to ensure locking.

[0029] A guide wheel sealing cover 11 and a double-lip skeleton oil seal 12 are provided at the outer end of the bearing housing 6 to improve the sealing performance between the bearing housing 2 and the bearing sleeve 6. The guide wheel sealing cover 11 is fitted onto the bearing sleeve 6 and threadedly connected to the bearing housing 2. The double-lip skeleton oil seal 12 is located between the inner hole of the guide wheel sealing cover 11 and the bearing sleeve 6. The outer lip provides enhanced protection against the ingress of mud, while the inner lip effectively prevents the penetration of water vapor. This sealing structure is easy to maintain; if the double-lip skeleton oil seal 12 is damaged or blocked, the guide wheel sealing cover 11 can be removed and replaced promptly.

[0030] Meanwhile, two labyrinth rings are installed between the bearing sleeve 5 and the bearing housing 2 for sealing, and a fluororubber skeleton oil seal 13 is also installed between the bearing housing 2 and the bearing sleeve 5. The aforementioned double-lip skeleton oil seal 12, labyrinth rings, and fluororubber skeleton oil seal 13 are arranged sequentially from the outside to the inside, providing multiple effective protections for the bearing 4 and preventing mud and water mist from entering the bearing. The sliding surface roughness of the double-lip skeleton oil seal 12 and the fluororubber skeleton oil seal 13 is greater than Ra0.8, and the surface is coated with grease.

[0031] The O-ring 14 installed inside the bearing sleeve 6 can prevent water vapor from entering the through hole of the guide wheel body 1 through the assembly gap between the bearing sleeve 6 and the guide wheel shaft 3, thus further ensuring the sealing effect of the entire device.

[0032] As attached Figure 4 As shown, the bearing sleeve 6 has an axial oil inlet channel 6-1 that connects to the bearing cavity, and a lubrication connector 15 is installed at the inlet of the oil inlet channel 6-1. The bearing housing 2 has an axial oil outlet channel 2-1. The oil inlet end of the oil outlet channel 2-1 is connected to the slot in the middle of the outer ring of the bearing 4 through a radial channel, and the oil outlet end of the oil outlet channel 2-1 is connected to the one-way valve 16 through the through hole of the guide wheel seal cover 11. The above-mentioned oil inlet channel is used to deliver lubricating oil, ensuring that the oil filling volume in the bearing cavity is 1 / 2 to 3 / 4, wherein the lubricating oil is preferably high-temperature lithium-based grease, and the filling volume is preferably 2 / 3.

[0033] When changing the lubricating oil, the lubrication connector 15 is connected to the oil pump or oil nozzle via an external copper pipe. The lubricating oil enters the bearing cavity from port A through the oil inlet channel 6-1. The waste oil enters the oil outlet channel 2-1 through the middle slot of the outer ring of bearing 4, and is discharged from port B through bearing seat 2, guide wheel seal cover 11, and check valve 16.

[0034] When installing the guide wheel body 1 using the structure described in this embodiment, the bearing assembly, consisting of the bearing housing 2, bearing 4, and bearing sleeve 6, can be pre-assembled and fitted onto both ends of the guide wheel shaft 3. Then, the bearing assembly is installed in the end face holes of the guide wheel body 1, and the bearing housing 2 is fixed to the end face of the guide wheel body 1 with screws. After the guide wheel body 1 is aligned, two semi-circular locking sleeves 10 are installed in the inner holes of the bearing sleeve 6, and the set screws 7 are used to tighten and restrict the axial movement of the bearing assembly, thereby achieving axial positioning of the bearing 4 and completing the rotational installation of the guide wheel body 1. Pre-assembling the bearing assembly allows for the pre-construction of a coplanar structure of the inner and outer ring end faces of the bearing before it is inserted into the end face holes of the guide wheel body 1, reducing installation difficulty.

[0035] The structure described in this embodiment avoids misalignment of the inner and outer ring end faces of the bearing, ensuring that the bearing clearance does not exceed 0.08mm and improving bearing service life. Multi-stage sealing effectively prevents external mud and moisture from entering the bearing, avoiding bearing corrosion and failure. It also facilitates regular replacement of the bearing grease, enabling bearing maintenance and extending bearing life.

[0036] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations of these embodiments without departing from the principles and spirit of the present invention will still fall within the protection scope of the present invention.

Claims

1. A guide wheel structure for a multi-strand diamond wire saw, comprising a guide wheel body (1), bearing seats (2), a guide wheel shaft (3), bearings (4), and a guide wheel base (5), wherein the guide wheel shaft (3) is inserted into the guide wheel body (1) and supported at both ends by the guide wheel bases (5), two bearing seats (2) are respectively installed in the end holes at both ends of the guide wheel body (1), and the bearings (4) are installed between the bearing seats (2) and the guide wheel shaft (3), characterized in that: A bearing sleeve (6) is provided between the bearing (4) and the guide wheel shaft (3). The bearing sleeve (6) is fitted on the outer circumference of the guide wheel shaft (3) and positioned by a set screw (7). The outer circle of the bearing sleeve (6) is tightly fitted with the inner hole of the bearing (4). The inner and outer ends of the inner ring of the bearing (4) are positioned by the shoulder of the bearing sleeve (6) and locked by a lock nut (8). The lock nut (8) is threaded with the outer circumference of the inner end of the bearing sleeve (6). A locking sleeve (10) is provided in the inner hole of the bearing sleeve (6) to prevent the set screw (7) from damaging the guide wheel shaft (3). The locking sleeve (10) is composed of two semicircles joined together. The set screw (7) is two screws arranged radially symmetrically. The outer circle of the bearing (4) fits tightly with the inner hole of the bearing housing (2). The inner and outer ends of the outer ring of the bearing (4) are respectively positioned by the inner hole of the bearing housing (2) and pressed by the bearing cover (9). A labyrinth ring is provided between the bearing sleeve (6) and the bearing housing (2) for sealing. The bearing sleeve (6) has an axial oil inlet channel (6-1) connected to the bearing cavity, and a lubrication connector (15) is configured at the inlet of the oil inlet channel (6-1); the bearing seat (2) has an axial oil outlet channel (2-1), the oil inlet end of the oil outlet channel (2-1) is connected to the slot in the middle of the outer ring of the bearing (4), and the oil outlet end of the oil outlet channel (2-1) is connected to the one-way valve (16).

2. The multi-strand diamond wire saw guide wheel structure according to claim 1, characterized in that: The outer end of the bearing housing (2) is provided with a guide wheel sealing cover (11) and a double-lip skeleton oil seal (12) to improve the sealing between the bearing housing (2) and the bearing sleeve (6). The guide wheel sealing cover (11) is sleeved on the bearing sleeve (6) and threaded to the bearing housing (2). The double-lip skeleton oil seal (12) is located between the inner hole of the guide wheel sealing cover (11) and the bearing sleeve (6).

3. The multi-strand diamond wire saw guide wheel structure according to claim 2, characterized in that: A fluororubber skeleton oil seal (13) is provided between the bearing housing (2) and the bearing sleeve (6), and the double-lip skeleton oil seal (12), labyrinth ring, and fluororubber skeleton oil seal (13) are arranged sequentially from the outside to the inside.

4. The multi-strand diamond wire saw guide wheel structure according to claim 3, characterized in that: The sliding surface roughness of the double-lip skeleton oil seal (12) and the fluororubber skeleton oil seal (13) is greater than Ra0.8, and the surface is coated with grease; the number of labyrinth rings is not less than two.

5. The multi-strand diamond wire saw guide wheel structure according to claim 1, characterized in that: The O-ring (14) installed inside the bearing sleeve (6) prevents moisture from entering.

6. The multi-strand diamond wire saw guide wheel structure according to claim 1, characterized in that: The oil inlet channel (6-1) and oil outlet channel (2-1) are used to deliver high-temperature lithium-based grease, and the bearing cavity is filled with 1 / 2 to 3 / 4 of high-temperature lithium-based grease.

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