Double-end static pressure grinding wheel assembly

Abstract

The utility model provides a double-end static pressure grinding wheel assembly, and belongs to the technical field of machinery. The problem that an existing grinding wheel assembly is poor in working stability is solved. The double-end static pressure grinding wheel assembly comprises a main shaft, a grinding wheel sleeved in the middle of the main shaft and two shaft sleeves sleeved at two ends of the main shaft respectively, two annular chucks are arranged in the middle of the main shaft, the grinding wheel is clamped between the two chucks, bearings and sealing rings are arranged between two ends of the shaft sleeves and the main shaft respectively, and annular grooves are formed in end faces, far away from each other, of the two chucks. Baffle rings are correspondingly formed on the two shaft sleeves, and the baffle rings, the annular groove and the main shaft are coaxially arranged; and the baffle ring extends into the corresponding annular groove, and the baffle ring and the annular groove are in clearance fit to form a zigzag channel. The double-end static pressure grinding wheel assembly works stably.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical technical field relates to a static pressure grinding wheel subassembly, in particular to a double -end static pressure grinding wheel subassembly. BACKGROUND

[0002] When the grinding wheel is larger and heavier, the grinding wheel spindle generally adopts two end supports, this structure such as the China patent library discloses an axial thrust dynamic pressure centerless grinding wheel shaft (application number: 202321939382.5), including the spindle, the bearing support unit I and bearing support unit II that are set up in the left and right ends of the spindle, the grinding wheel chucking device that is set up in the middle of the grinding wheel shaft, the left end of the spindle is provided with bearing thrust device;The right end of the spindle is provided with connecting device;Bearing support unit I, including left flange, left bearing, left shaft sleeve, left end cover, left baffle cover, left bearing is sleeved in the inner wall of left shaft sleeve, left flange sets up fixed installation in the left end of left shaft sleeve;Install thrust ring between left flange and left bearing;Left end cover sets up installation in the right end of left shaft sleeve and presses the skeleton oil seal;Left baffle cover sets up installation left flange's left end inner wall and presses the skeleton oil seal;Left flange, left bearing, left shaft sleeve upper portion sets up oil inlet channel structure;Left flange, left bearing and left shaft sleeve's lower portion sets up oil outlet channel structure.

[0003] In the above-mentioned grinding wheel shaft, the left end cover and the right end cover are sealed between the sealing ring and the spindle to prevent hydraulic oil from leaking to the grinding wheel direction. However, in actual use, the grinding waste will directly contact the sealing ring, which can easily damage the sealing ring and cause sealing failure, affecting the working stability and service life of the grinding wheel shaft. UTILITY MODEL CONTENTS

[0004] The utility model aims at the above-mentioned problems existing in prior art, and provides a double-end static pressure grinding wheel assembly with stable work.

[0005] The utility model discloses a double-end static pressure grinding wheel assembly, which comprises a spindle, a grinding wheel sleeved in the middle of the spindle and two shaft sleeves sleeved at the two ends of the spindle, the middle of the spindle is provided with two ring-shaped chucks, the grinding wheel is clamped between the two chucks, bearings and sealing rings are arranged between the two ends of the shaft sleeves and the spindle, characterized in that, the end faces of the two chucks away from each other are provided with annular grooves, the shaft sleeves are correspondingly provided with stop rings, and the stop rings, the annular grooves and the spindle are coaxially arranged, the outer diameter of the stop ring is smaller than the groove width of the annular groove, the stop ring extends into the corresponding annular groove, and the gap between the stop ring and the annular groove forms a zigzag channel.

[0006] The stop ring on the shaft sleeve extends into the annular groove on the chuck to form a zigzag channel, thereby forming a labyrinth seal between the shaft sleeve and the grinding wheel, and the labyrinth seal is between the grinding wheel and the sealing ring, which effectively prevents the grinding waste from contacting the sealing ring, prolongs the sealing time, and improves the working stability and service life of the grinding wheel assembly.

[0007] In the double-end static pressure grinding wheel assembly, the outer side wall of the retaining ring has a tapered retaining surface, and the diameter of the retaining surface gradually increases from the corresponding shaft sleeve to the grinding wheel; one side of the retaining surface is located in the corresponding annular groove, and the other side of the retaining surface extends to the outer side surface of the corresponding shaft sleeve. The tapered surface with a diameter gradually increasing from the corresponding shaft sleeve to the grinding wheel is formed on the outer side wall of the retaining ring, so that the difficulty of grinding waste entering the annular groove is increased by the slope of the retaining surface, the protection of the sealing ring is enhanced, and the working stability and service life of the grinding wheel assembly are more stable.

[0008] In the double-end static pressure grinding wheel assembly, the annular groove includes oppositely arranged upper and lower side surfaces, and the lower side surface is located between the main shaft and the corresponding retaining ring and has a tapered shape with a diameter gradually decreasing from the corresponding retaining ring to the grinding wheel, so that the difficulty of grinding waste entering the tortuous channel is increased, and the sealing ring is better protected.

[0009] In the double-end static pressure grinding wheel assembly, the shaft sleeve includes a sealing ring and a cylindrical main body, the sealing ring and the main body are coaxially arranged, and the two sealing rings are located between the two main bodies; the sealing ring is sealingly connected with the corresponding main body, the two bearings are respectively located in the two main bodies, and the two retaining rings are respectively formed on the two sealing rings. The shaft sleeve adopts a split structure, which is convenient for design and assembly.

[0010] In the double-end static pressure grinding wheel assembly, in the same shaft sleeve, the main body and the sealing ring are sealed by the corresponding sealing ring. The sealing ring simultaneously seals the shaft sleeve and the main shaft, and the main body and the sealing ring, that is, the sealing ring has a dual-purpose effect, so as to simplify the structure and facilitate assembly.

[0011] In the double-end static pressure grinding wheel assembly, in the same shaft sleeve, the end surfaces of the main body and the sealing ring are attached together, and the outer side surfaces of the sealing ring are in contact with the inner side surfaces of the corresponding main body and the corresponding sealing ring.

[0012] In the double-end static pressure grinding wheel assembly, a guide ring is formed on the end surface of the sealing ring close to the corresponding main body, and the guide ring and the sealing ring are coaxially arranged; a ring-shaped step matching the guide ring is formed on the outer side surface of the main body, and the guide ring is inserted into the corresponding ring-shaped step. The guide ring and the ring-shaped step cooperate, which is beneficial to the assembly of the main body and the sealing ring.

[0013] Compared with the prior art, the double-end static pressure grinding wheel assembly has the following advantages:

[0014] 1. The retaining ring on the shaft sleeve extends into the annular groove in the chuck to form a tortuous channel, thereby forming a labyrinth seal between the shaft sleeve and the grinding wheel, and the labyrinth seal is located between the grinding wheel and the sealing ring, effectively preventing the grinding waste from contacting the sealing ring, thereby prolonging the sealing time and improving the working stability and service life of the grinding wheel assembly.

[0015] 2. A taper is formed on the outer wall of the retaining ring, the diameter of the taper gradually increases from the corresponding shaft sleeve to the grinding wheel, so that the difficulty of grinding waste into the annular groove is increased by the taper of the retaining surface, the protection of the sealing ring is enhanced, and the working stability and service life of the grinding wheel assembly are more stable. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a sectional view of the double-end hydrostatic grinding wheel assembly.

[0017] Figure 2 is Figure 1 an enlarged view of A in FIG.

[0018] In the figure, 1 is a main shaft, 2 is a grinding wheel, 3 is a shaft sleeve, 3a is a retaining ring, 3b is a retaining surface, 3c is a sealing ring, 3c1 is a guide ring, 3d is a main body, 4 is a chuck, 4a is an annular groove, 4b is a lower surface, 5 is a bearing, 6 is a sealing ring, and 7 is a tortuous channel. DETAILED DESCRIPTION

[0019] The following is a specific embodiment of the present application and further describes the technical scheme of the present application in combination with the drawings, but the present application is not limited to these embodiments.

[0020] As Figure 1 shown, the double-end hydrostatic grinding wheel assembly includes a main shaft 1, a grinding wheel 2 sleeved in the middle of the main shaft 1, and two shaft sleeves 3 sleeved at both ends of the main shaft 1.

[0021] Among them,

[0022] The middle of the main shaft 1 has two chucks 4, which are coaxial with the main shaft 1, and the grinding wheel 2 is clamped between the two chucks 4. In actual products, the chuck 4 and the main shaft 1 are of split structure, and the two are fixed together by welding, bolts, etc.

[0023] As Figure 1 and Figure 2 shown, the shaft sleeve 3 is provided with a bearing 5 and a sealing ring 6 between the two ends and the main shaft 1, the two sealing rings 6 are between the two bearings 5, and the grinding wheel 2 is between the two sealing rings 6. Among them, the installation mode of the bearing 5 is existing, and specific reference is made to a kind of axial thrust dynamic pressure centerless grinding wheel shaft (application number: 202321939382.5) disclosed by Chinese patent library, which is not expanded here. The inner side wall of the sealing ring 6 is in contact with the outer side wall of the main shaft 1, and the outer side wall of the sealing ring 6 is in contact with the inner wall of the corresponding shaft sleeve 3.

[0024] As Figure 2As shown, the two chucks 4 are provided with annular grooves 4a on the distal end faces thereof, and the two shaft sleeves 3 are correspondingly provided with blocking rings 3a, and the blocking ring 3a, the annular groove 4a and the main shaft 1 are coaxially arranged. The annular groove 4a is surrounded by an upper side, a lower side 4b and a bottom, the upper side and the lower side 4b are oppositely arranged, and the bottom is between the upper side and the lower side 4b. The outer diameter of the blocking ring 3a is smaller than the groove width of the annular groove 4a, the blocking ring 3a extends into the corresponding annular groove 4a, and the gap between them forms a zigzag channel 7, and at this time, the lower side 4b is between the main shaft 1 and the corresponding blocking ring 3a.

[0025] The blocking ring 3a on the shaft sleeve 3 extends into the annular groove 4a on the chuck 4 to form the zigzag channel 7, thereby forming a labyrinth seal between the shaft sleeve 3 and the grinding wheel 2, and the labyrinth seal is between the grinding wheel 2 and the sealing ring 6, effectively preventing the grinding debris from contacting the sealing ring 6, thereby prolonging the sealing time and improving the working stability and service life of the grinding wheel 2 assembly.

[0026] Further, the outer sidewall of the blocking ring 3a has a tapered blocking surface 3b, and the diameter of the blocking surface 3b gradually increases from the corresponding shaft sleeve 3 to the grinding wheel 2; one side of the blocking surface 3b is in the corresponding annular groove 4a, and the other side of the blocking surface 3b extends to the outer side of the corresponding shaft sleeve 3. A tapered surface with a diameter gradually increasing from the corresponding shaft sleeve 3 to the grinding wheel 2 is formed on the outer sidewall of the blocking ring 3a, so as to increase the difficulty of the grinding debris entering the annular groove 4a through the slope of the blocking surface 3b, and to better protect the sealing ring 6, thereby more stably achieving the improvement of the working stability and service life of the grinding wheel 2 assembly.

[0027] The lower side 4b is tapered with a diameter gradually decreasing from the corresponding blocking ring 3a to the grinding wheel 2, which can increase the difficulty of the grinding debris passing through the zigzag channel 7, thereby better protecting the sealing ring 6.

[0028] In the embodiment,

[0029] As shown in Figs. Figure 1 and Figure 2 The structure of the shaft sleeve 3 is as follows: the shaft sleeve 3 comprises sealing rings 3c and cylindrical main bodies 3d, the sealing rings 3c and the main bodies 3d are coaxially arranged, and the two sealing rings 3c are between the two main bodies 3d. The sealing rings 3c are sealingly and fixedly connected with the corresponding main bodies 3d, the two bearings 5 are respectively in the two main bodies 3d, and the two blocking rings 3a are respectively formed on the two sealing rings 3c. The shaft sleeve 3 adopts a split structure, which is convenient for design and assembly.

[0030] Among them,

[0031] In the same shaft sleeve 3, the main body 3d and the sealing ring 3c are sealed by the corresponding sealing ring 6. The sealing ring 6 simultaneously seals the shaft sleeve 3 and the main shaft 1 and the main body 3d and the sealing ring 3c, that is, the sealing ring 6 has a dual-purpose effect, so as to simplify the structure and facilitate assembly. Specifically, in the same shaft sleeve 3, the end faces of the main body 3d and the sealing ring 3c are attached together, and the outer side surfaces of the sealing ring 6 are in contact with the inner side surfaces of the corresponding main body 3d and the corresponding sealing ring 3c.

[0032] The main body 3d and the corresponding sealing ring 3c are welded or bolted together, and preferably the main body 3d and the corresponding sealing ring 3c are bolted together. Further, the sealing ring 3c is formed with a guide ring 3c1 on the end face close to the corresponding main body 3d, and the guide ring 3c1 and the sealing ring 3c are coaxially arranged. The outer side surface of the main body 3d is provided with a ring-shaped step matched with the guide ring 3c1, and the guide ring 3c1 is inserted into the corresponding ring-shaped step. The cooperation of the guide ring 3c1 and the ring-shaped step facilitates the assembly of the main body 3d and the sealing ring 3c.

[0033] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A double-ended static pressure grinding wheel assembly, comprising a spindle (1), a grinding wheel (2) sleeved in the middle of the spindle (1), and two shaft sleeves (3) sleeved in the two ends of the spindle (1) respectively, the middle of the spindle (1) has two clamping discs (4) each in the form of a ring, and the grinding wheel (2) is clamped between the two clamping discs (4), a bearing (5) and a sealing ring (6) are arranged between the two ends of the shaft sleeve (3) and the spindle (1) respectively, characterized in that, The two chucks (4) are provided with annular grooves (4a) on their distal end faces, and the two shaft sleeves (3) are correspondingly provided with retaining rings (3a), and the retaining ring (3a), the annular groove (4a) and the main shaft (1) are coaxially arranged; the outer diameter of the retaining ring (3a) is smaller than the groove width of the annular groove (4a), the retaining ring (3a) extends into the corresponding annular groove (4a) and the gap therebetween forms a zigzag channel (7).

2. The dual ended dead grinding wheel assembly of claim 1, wherein, The outer side wall of the above-mentioned retaining ring (3a) is provided with a tapered retaining surface (3b), and the diameter of the retaining surface (3b) gradually increases from the corresponding shaft sleeve (3) to the grinding wheel (2); one side of the retaining surface (3b) is located in the corresponding annular groove (4a), and the other side of the retaining surface (3b) extends to the outer side of the corresponding shaft sleeve (3).

3. The dual ended dead grinding wheel assembly of claim 1, wherein, The annular groove (4a) comprises oppositely arranged upper and lower side surfaces (4b), the lower side surface (4b) is located between the main shaft (1) and the corresponding retaining ring (3a), and the lower side surface (4b) is tapered and gradually decreases in diameter from the corresponding retaining ring (3a) to the grinding wheel (2).

4. The dual ended dead grinding wheel assembly of claim 1, wherein, The shaft sleeve (3) comprises a sealing ring (3c) and a cylindrical main body (3d), the sealing ring (3c) and the main body (3d) are coaxially arranged, and the two sealing rings (3c) are located between the two main bodies (3d); the sealing ring (3c) and the corresponding main body (3d) are sealingly connected, the two bearings (5) are respectively located in the two main bodies (3d), and the two retaining rings (3a) are respectively formed on the two sealing rings (3c).

5. The dual ended dead grinding wheel assembly of claim 4, wherein, In the same shaft sleeve (3), the main body (3d) and the sealing ring (3c) are sealed by the corresponding sealing ring (6).

6. The dual ended dead grinding wheel assembly of claim 5, wherein, In the same shaft sleeve (3), the end faces of the main body (3d) and the sealing ring (3c) are attached together, and the outer side surfaces of the above-mentioned sealing ring (6) are in contact with the inner side surfaces of the corresponding main body (3d) and the inner side surfaces of the corresponding sealing ring (3c).

7. The double-ended dead grinding wheel assembly of claim 4 or 5 or 6, wherein, The end face of the sealing ring (3c) close to the corresponding main body (3d) is provided with a guide ring (3c1), and the guide ring (3c1) and the sealing ring (3c) are coaxially arranged, and the outer side surface of the main body (3d) is provided with an annular step matched with the guide ring (3c1), and the guide ring (3c1) is inserted into the corresponding annular step.

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