Bearing pre-tightening mechanism of high-temperature wire machine

Abstract

The invention discloses a bearing pre-tightening mechanism of a high-temperature wire machine, and relates to the technical field of high-temperature wire machines, the bearing pre-tightening mechanism comprises a main body, the main body is provided with a feeding cavity and a retracting cavity, the main body comprises a shell and a main shaft, a hydraulic cylinder is arranged in the shell, and the right side of the hydraulic cylinder is in threaded connection with a bearing seat. The device is provided with the first pre-tightening mechanism capable of adjusting the pre-tightening force of the second bearing according to different conditions of operation or shutdown, and can only provide necessary minimum pre-tightening force for the bearings when equipment is shut down, so that the bearings are prevented from being fatigue and damaged, the service life of the bearings is prolonged, and the maintenance and replacement period of the bearings is prolonged; the device is provided with the third pre-tightening mechanism capable of adjusting the pre-tightening force of the first bearing and the third bearing at any time, the pre-tightening force of the bearings can be adjusted according to conditions, the minimum pre-tightening force needed by the bearings can be provided by a mechanical structure when equipment is shut down, the bearings are prevented from being fatigue and damaged, the service life of the bearings is prolonged, and the maintenance and replacement period of the bearings is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of high-temperature silk-making machines, and in particular to a bearing pre-tightening mechanism of a high-temperature silk-making machine. Background Art

[0002] The papermaking industry is an important basic raw material industry closely related to the development of the national economy and the construction of human civilization. The high-temperature silk-making machine is a commonly used equipment in the papermaking industry. During operation, the grinding chamber will maintain high temperature and high pressure. Therefore, the bearing will bear a large axial load while bearing radial load. Therefore, spherical roller bearings are mostly used in high-temperature silk-making. Spherical roller thrust bearings are separable bearings. The inner ring, outer ring, cage, and roller assembly of the bearing can be installed separately. The installation accuracy and axial preload of the spherical roller thrust bearing affect the bearing accuracy, life, and performance. In order to make the spherical roller thrust bearing run well during high-speed or high-acceleration operation, the bearing requires a certain axial preload to be provided during operation to prevent the bearing from abnormal wear or even scrapping due to insufficient preload and insufficient matching accuracy.

[0003] Currently, commonly used bearing preload devices are often simple in structure and single in function. They are unable to adjust the axial preload force of the bearing according to the working conditions. The equipment still bears a large axial preload force during shutdown. Over time, the bearing is prone to fatigue, which can easily reduce the service life of the bearing and shorten the maintenance and replacement cycle of the bearing. Summary of the invention

[0004] In order to improve the above-mentioned common bearing preload devices, which are often simple in structure and single in function, and cannot adjust the axial preload force of the bearing according to the working conditions, and still bear a large axial preload force during equipment shutdown, the bearing is prone to fatigue over time, thereby easily reducing the service life of the bearing and shortening the maintenance and replacement cycle of the bearing, the present invention provides a bearing preload mechanism for a high-temperature silk-making machine.

[0005] The present invention provides a bearing pre-tightening mechanism for a high-temperature silk-forming machine, which adopts the following technical solution: A bearing preload mechanism for a high-temperature silk-making machine comprises a main body, wherein the main body is provided with a knife feed cavity and a knife retracting cavity, the main body comprises a shell and a main shaft, a hydraulic cylinder is arranged in the shell, a bearing seat is threadedly connected to the right side of the hydraulic cylinder, a first bearing is arranged on the inner side of the right end of the bearing seat, a second bearing is arranged on the inner side of the left end of the bearing seat, a main preload mechanism is arranged on the inner side of the right end of the hydraulic cylinder, the main preload mechanism is arranged on the left side of the second bearing, a third bearing is arranged on the left side of the main preload mechanism, the main shaft passes through the third bearing, the main preload mechanism, the second bearing and the first bearing in sequence from left to right, a plurality of first preload mechanisms for adjusting the preload force of the second bearing are arranged on the right side of the main preload mechanism, a plurality of second preload mechanisms for adjusting the preload force of the first bearing and a plurality of third preload mechanisms for adjusting the preload force of the third bearing are arranged on the left side of the main preload mechanism.

[0006] Optionally, in the above-mentioned bearing preload mechanism of the high-temperature silk-making machine, the main preload mechanism includes a rear pressure cover, the rear pressure cover is threadedly connected to the hydraulic cylinder, the right side of the rear pressure cover is threadedly connected to a piston seat, the right side of the piston seat is threadedly connected to a disc spring seat, the right side of the disc spring seat is threadedly connected to a front pressure cover, a plurality of first step holes corresponding to the first preload mechanism are opened in the front pressure cover, the first preload mechanism is located in the first step hole and slidably cooperates with the inner wall of the first step hole.

[0007] Optionally, in the above-mentioned bearing pre-tightening mechanism of a high-temperature silk-making machine, a first pressurizing chamber is provided on the left side of the first pre-tightening mechanism, and a first pressure relief chamber is provided on the right side of the first pre-tightening mechanism, the first pre-tightening mechanism includes a plunger shell, and the plunger shell cooperates with the first pressure relief chamber and the first pressurizing chamber so that the plunger shell can move left and right, and a first retaining ring and a first center rod are provided in the plunger shell, and the first center rod is movably arranged in the plunger shell, and a third step groove is provided in the plunger shell, and a first groove is provided on the left side of the third step groove, the first retaining ring is located in the first groove, a first step is provided on the first center rod, a second groove is provided on the left end of the first center rod, a second retaining ring is provided on the second groove, and a first pressure ring is provided on the right side of the second retaining ring, and the left end of the first pressure ring abuts against the right side of the third step groove, and a plurality of first disc springs are provided between the first pressure ring and the first step.

[0008] Optionally, in the above-mentioned bearing preload mechanism of the high-temperature silk-making machine, the second bearing includes a second outer ring, the second outer ring abuts against the right end of the first center rod, and the plunger shell, the first center rod, the first pressure ring and the first disc spring cooperate to form a first preload mechanism for adjusting the preload force of the second bearing.

[0009] Optionally, in the bearing preload mechanism of the above-mentioned high-temperature silk-making machine, the right end of the disc spring seat is provided with first oil holes corresponding to the number of the first preload mechanism, the first oil hole is connected to the first pressurizing chamber, the outer side of the disc spring seat is provided with a first oil groove, the disc spring seat is provided with a plurality of first connecting holes, the first oil hole is connected to the first oil groove through the first connecting hole, the hydraulic cylinder is provided with a first oil inlet hole, the first oil groove is connected to the feed chamber through the first oil inlet hole, the outer side of the front pressure cover is provided with a second oil groove, the front pressure cover is provided with a number of second connecting holes corresponding to the first pressure relief chamber, the second oil groove is connected to the first pressure relief chamber through the second connecting hole, the hydraulic cylinder is provided with a plurality of third connecting holes, the retracting chamber is connected to the second oil groove through the third connecting hole.

[0010] Optionally, in the above-mentioned bearing preload mechanism of the high-temperature silk-making machine, the right end of the rear pressure cover is provided with a first step groove corresponding to the number of the second preload mechanism, the second preload mechanism is arranged in the first step groove, the second preload mechanism includes a second center rod, the second center rod is provided with a second step, the rear end of the second center rod is provided with a third groove, a third retaining ring is arranged in the third groove, a second pressure ring is arranged on the left side of the third retaining ring, the right end of the second pressure ring abuts against the left side of the first step groove, a plurality of second disc springs are arranged between the second pressure ring and the second step, the third bearing includes a third outer ring, the right end of the second center rod abuts against the third outer ring, the second center rod, the second disc spring, the second pressure ring cooperate with the first step groove to form a second preload mechanism for adjusting the preload force of the third bearing.

[0011] Optionally, in the above-mentioned bearing preload mechanism of the high-temperature silk-making machine, a plurality of second step grooves are provided at the left end of the disc spring seat, a number of second step holes corresponding to the second step grooves are provided on the piston seat, the second step grooves and the second step holes cooperate to form a disc spring cavity, a plurality of the third preload mechanisms are respectively arranged in the plurality of disc spring cavities, the third preload mechanism comprises a third center rod, the left end of the third center rod abuts against the right end of the third outer ring, a third step and a fourth step are provided on the third center rod, a fourth groove is provided at the right end of the third center rod, a fourth retaining ring is provided in the fourth groove, a third pressure ring is provided on the left side of the fourth retaining ring, the right end of the third pressure ring abuts against the left side of the second step hole, and a plurality of third disc springs are provided between the third pressure ring and the fourth step; A piston cavity is provided on the piston seat, and the piston cavity is connected with the second stepped hole. A piston ring is movably arranged in the piston cavity. A circular hole is provided on the piston ring for the third center rod to pass through. The piston ring is fixedly sleeved on the third center rod. A second pressurizing cavity is provided on the left side of the piston ring, and a second pressure relief cavity is provided on the right side of the piston ring. The second pressurizing cavity, the second pressure relief cavity, the piston ring and the third center rod cooperate to enable the piston ring to move left and right. A ventilation hole is provided on the piston seat, and the ventilation hole is connected with the right end of the piston cavity. The other end of the ventilation hole passes through the piston seat.

[0012] Optionally, in the bearing preload mechanism of the above-mentioned high-temperature silk-making machine, a third oil groove is provided on the outer side of the piston seat, a plurality of fourth connecting holes are provided on the piston seat, the third oil groove is connected with the second pressure relief chamber through the fourth connecting hole, a first refueling hole and a second refueling hole are provided on the hydraulic cylinder, the third oil groove is connected with one end of the first refueling hole, a fifth connecting hole is provided on the rear pressure cover, and the second pressurizing chamber is connected with the second refueling hole through the fifth connecting hole.

[0013] Optionally, in the above-mentioned bearing preload mechanism of a high-temperature silk-making machine, a first sealing groove is provided at the left end of the plunger shell, a first sealing member is arranged on the first sealing groove, a plurality of second sealing grooves corresponding in number to the first stepped hole are provided at the left end of the front pressure cover, the second sealing groove is located on the outside of the first stepped hole, a second sealing member is arranged on the second sealing groove, the first sealing member cooperates with the second sealing member to form a sealing structure for sealing the first pressurized chamber, a third sealing groove is provided at the right end of the plunger shell, a third sealing member is arranged on the third sealing groove, and the third sealing member cooperates with the first sealing member to form a sealing structure for sealing the first pressure relief chamber; The left end of the piston ring is provided with a fourth sealing groove and a fifth sealing groove, the fourth sealing groove is arranged on the inner side of the piston ring, the fifth sealing groove is arranged on the outer side of the piston ring, the fourth sealing groove is provided with a fourth sealing member, and the fifth sealing groove is provided with a fifth sealing member, the right end of the rear pressure cover is provided with a sixth sealing groove and a seventh sealing groove, the sixth sealing groove is arranged on the outer side of the piston cavity, the seventh sealing groove is arranged on the inner side of the piston cavity, the sixth sealing groove is provided with a sixth sealing member, and the seventh sealing groove is provided with a seventh sealing member, the middle part of the third center rod is provided with an eleventh sealing groove, the eleventh sealing groove is provided with an eleventh sealing member, the left end of the third center rod is provided with a twelfth sealing groove, the twelfth sealing groove is provided with a twelfth sealing member, the fourth seal, the fifth seal, the seventh seal, the eleventh seal, the eleventh seal and the sixth seal cooperate to form a sealing structure for sealing the second pressurizing chamber; An eighth sealing groove and a ninth sealing groove are provided on the piston seat, the eighth sealing groove is provided on the outer side of the piston cavity and communicated with the piston cavity, the ninth sealing groove is provided on the inner side of the piston cavity and communicated with the piston cavity, an eighth sealing member is provided on the eighth sealing groove, a ninth sealing member is provided on the ninth sealing groove, and the fourth sealing member, the fifth sealing member, the eighth sealing member and the ninth sealing member cooperate to form a sealing structure for sealing the second pressure relief cavity; A tenth sealing groove is provided on the left and right sides of the first oil groove, the second oil groove and the third oil groove, and a tenth sealing member is provided on the tenth sealing groove. A thirteenth sealing groove is provided on the left end of the rear pressure cover, and the thirteenth sealing groove is located on the outer side of the left end of the fifth connecting hole, and a thirteenth sealing member is provided on the thirteenth sealing groove.

[0014] Optionally, in the bearing preload mechanism of the above-mentioned high-temperature silk-making machine, a plurality of connecting holes are provided on the piston ring, a locking nut and a locking washer are provided on the third center rod, the locking nut is connected to the threaded cooperation with the surface of the third center rod, the locking nut, the locking washer and the third center rod cooperate to form a fixing structure for fixing the third center rod and the piston ring, and two annular grooves and a plurality of radial grooves are provided on the right end of the rear pressure cover, the annular grooves are located in the piston cavity, and the two ends of the radial grooves are respectively connected to the two annular grooves.

[0015] In summary, the present invention includes at least one of the following beneficial effects: The present invention has a first preload mechanism that can adjust the preload force of the second bearing according to different operating or shutdown conditions, and can provide only the necessary minimum preload force for the bearing when the equipment is shut down, thereby preventing the bearing from fatigue damage, thereby extending the service life of the bearing and extending the maintenance and replacement cycle of the bearing; The present invention has a third preload mechanism that can adjust the preload force of the first bearing and the third bearing at any time. The preload force of the bearing can be adjusted according to the situation. The mechanical structure can also provide the minimum preload force required by the bearing when the equipment is shut down, thereby preventing the bearing from fatigue damage, extending the service life of the bearing, and extending the maintenance and replacement cycle of the bearing. The invention has reasonably distributed hydraulic oil channels, which can make the pressurization more stable and uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the overall structure of the present invention.

[0017] Figure 2 For the present invention Figure 1 A partial enlarged view of point A in the middle.

[0018] Figure 3 It is a cross-sectional view of the main structure of the present invention.

[0019] Figure 4For the present invention Figure 3 A partial enlarged view of point B in the middle.

[0020] Figure 5 For the present invention Figure 3 A partial enlarged view of point C in the middle.

[0021] Figure 6 It is a schematic diagram of the distribution of the annular groove and the radial groove on the rear gland of the present invention.

[0022] In the figure: 1, main body; 2, main preload mechanism; 3, main shaft; 4, housing; 5, hydraulic cylinder; 6, bearing seat; 7, first bearing; 8, second bearing; 9, third bearing; 10, first preload mechanism; 11, second preload mechanism; 12, third preload mechanism; 15, knife-entry chamber; 16, knife-retraction chamber; 17, rear pressure cover; 18, piston seat; 19, disc spring seat; 20, front pressure cover; 21, third center rod; 22, first pressurizing chamber; 2 3. First pressure relief chamber; 24. Plunger housing; 25. First retaining ring; 26. First center rod; 27. First step; 28. Second retaining ring; 29. ​​First pressure ring; 30. First disc spring; 31. First oil hole; 32. First oil groove; 33. First connecting hole; 34. First oil inlet hole; 35. Second connecting hole; 36. Third connecting hole; 38. Second center rod; 39. Second step; 40. Third retaining ring; 41. Second pressure ring; 42 , second disc spring; 43, third outer ring; 44, third step; 45, fourth step; 46, fourth retaining ring; 47, third pressure ring; 48, third disc spring; 49, piston ring; 50, second pressurizing chamber; 51, second pressure relief chamber; 52, air vent; 53, third oil groove; 54, fourth connecting hole; 55, first oil filling hole; 56, fifth connecting hole; 57, second oil filling hole; 58, first sealing member; 59, second sealing member; 60 , the third seal; 61, the fourth seal; 62, the fifth seal; 63, the sixth seal; 64, the eighth seal; 65, the ninth seal; 66, the tenth seal; 67, the second outer ring; 68, the second oil groove; 69, the seventh seal; 70, the thirteenth seal; 71, the eleventh seal; 72, the twelfth seal; 73, the connecting hole; 74, the locking nut; 75, the locking washer; 76, the annular groove; 77, the radial groove. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-6 The present invention is described in further detail.

[0024] Please refer to the attached figure in the instruction manual Figure 1-6, an embodiment of the present invention: a bearing preload mechanism of a high-temperature silk-making machine, comprising a main body 1, a knife feed cavity 15 and a knife retracting cavity 16 are opened on the main body 1, the main body 1 comprises a shell 4 and a main shaft 3, a hydraulic cylinder 5 is arranged in the shell 4, the hydraulic cylinder 5 can move left and right in the shell 4, a bearing seat 6 is threadedly connected to the right side of the hydraulic cylinder 5, a first bearing 7 is arranged on the inner side of the right end of the bearing seat 6, a second bearing 8 is arranged on the inner side of the left end of the bearing seat 6, a main preload mechanism 2 is arranged on the inner side of the right end of the hydraulic cylinder 5, the main preload mechanism 2 is arranged on the left side of the second bearing 8, a third bearing 9 is arranged on the left side of the main preload mechanism 2, the main shaft 3 passes through the third bearing 9, the main preload mechanism 2, the second bearing 8 and the first bearing 7 from left to right in sequence, and a plurality of first preload mechanisms 10 for adjusting the preload force of the second bearing 8 are arranged on the right side of the main preload mechanism 2, the preload force of the second bearing 8 can be reduced by the first preload mechanism 10 when the equipment is stopped, and sufficient preload force can be provided for the second bearing 8 when the equipment is running.

[0025] The main preload mechanism 2 includes a rear pressure cover 17, which is threadedly connected to the hydraulic cylinder 5. The right side of the rear pressure cover 17 is threadedly connected to a piston seat 18, the right side of the piston seat 18 is threadedly connected to a disc spring seat 19, and the right side of the disc spring seat 19 is threadedly connected to a front pressure cover 20. A plurality of first step holes corresponding to the first preload mechanism 10 are provided in the front pressure cover 20. The first preload mechanism 10 is located in the first step hole and slidably cooperates with the inner wall of the first step hole. The first preload mechanism 10 can slide left and right in the corresponding first step hole.

[0026] A first pressurizing chamber 22 is provided on the left side of the first pre-tightening mechanism 10, and a first pressure relief chamber 23 is provided on the right side of the first pre-tightening mechanism 10. The first pre-tightening mechanism 10 includes a plunger shell 24. The plunger shell 24 cooperates with the first pressure relief chamber 23 and the first pressurizing chamber 22 so that the plunger shell 24 can move left and right. A first retaining ring 25 and a first center rod 26 are provided in the plunger shell 24. The first center rod 26 is movably arranged in the plunger shell 24. A third step groove is provided in the plunger shell 24. A first groove is provided on the left side of the third step groove. The first retaining ring 25 is located in the first groove. A first step 27 is provided on the first center rod 26. A second groove is provided on the left end of the first center rod 26. A second retaining ring 28 is provided on the second groove. A first pressure ring 29 is provided on the right side of the second retaining ring 28. The left end of the first pressure ring 29 abuts against the right side of the third step groove. A plurality of first disc springs 30 are provided between the first pressure ring 29 and the first step 27.

[0027] The second bearing 8 includes a second outer ring 67, and the second outer ring 67 abuts against the right end of the first center rod 26. The plunger housing 24, the first center rod 26, the first pressure ring 29 and the first disc spring 30 cooperate to form a first preload mechanism 10 for adjusting the preload force of the second bearing 8. When the first pressurizing chamber 22 enters oil and the first pressure relief chamber 23 discharges oil, the plunger housing 24 moves to the right, thereby driving the first pressure ring 29 to move to the right, and the right end face of the first center rod 26 contacts the left end face of the second outer ring 67, so the first center rod 26 and the first step 27 remain stationary, thereby reducing the distance between the first step 27 and the first pressure ring 29, thereby compressing the first disc spring 30, and the first disc spring 30 has a recovery The first disc spring 30 releases its elastic potential energy and deforms to restore its original state, thereby driving the first pressure ring 29 to move to the left, and the right end face of the first center rod 26 contacts the left end face of the second outer ring 67, so the first center rod 26 and the first step 27 remain stationary, thereby increasing the distance between the first step 27 and the first pressure ring 29, so that part of the elastic potential energy of the first disc spring 30 is released, thereby reducing the preload force of the first center rod 26 on the second bearing 8, and only providing the minimum preload force of the bearing.

[0028] The right end of the disc spring seat 19 is provided with first oil holes 31 corresponding to the number of the first preload mechanism 10, and the first oil holes 31 are connected to the first pressurizing chamber 22. The outer side of the disc spring seat 19 is provided with a first oil groove 32, and the disc spring seat 19 is provided with a plurality of first connecting holes 33, and the first oil hole 31 is connected to the first oil groove 32 through the first connecting holes 33. The hydraulic cylinder 5 is provided with a first oil inlet hole 34, and the first oil groove 32 is connected to the feed chamber 15 through the first oil inlet hole 34. The outer side of the front pressure cover 20 is provided with a second oil groove 68, and the front pressure cover 20 is provided with a number of second connecting holes 35 corresponding to the first pressure relief chamber 23, and the second oil groove 68 is connected to the first pressure relief chamber 23 through the second connecting hole 35. The hydraulic cylinder 5 is provided with a plurality of third connecting holes 36, and the retracting chamber 16 is connected to the second oil groove 68 through the third connecting hole 36. When the equipment is started and operated, hydraulic oil will enter the knife-entering chamber 15 and the pressure will increase, while the hydraulic oil will flow out of the knife-retracting chamber 16 and the pressure will decrease, so that the hydraulic oil can enter the first oil groove 32 from the first oil inlet hole 34, and the first connecting holes 33 are evenly distributed around the circumference, so that the hydraulic oil can evenly flow through the first connecting holes 33 into the first oil hole 31, so that the lubricating oil can evenly flow into the corresponding first pressurizing chamber 22, and the lubricating oil in the first pressure relief chamber 23 can flow into the second oil groove 68 through the second connecting holes 35 and then through the third connecting holes 3 evenly distributed around the circumference. 6 and then flows into the tool withdrawal chamber 16, so that the first pressurizing chamber 22 is evenly pressurized and the first pressure relief chamber 23 is evenly discharged to relieve the pressure. When the equipment needs to be shut down, hydraulic oil enters the tool withdrawal chamber 16, the pressure increases, and the hydraulic oil outflow pressure in the tool feed chamber 15 decreases. Similarly, oil can flow out of the first pressurizing chamber 22 and enter the first pressure relief chamber 23, so that when the equipment is running, the second bearing 8 can be provided with a suitable preload according to the actual situation to prevent the bearing from bearing a large load for a long time, thereby increasing the service life of the bearing and extending the maintenance and replacement cycle.

[0029] On the left side of the main preload mechanism 2 are arranged several second preload mechanisms 11 for adjusting the preload force of the first bearing 7 and several third preload mechanisms 12 for adjusting the preload force of the third bearing 9. The second preload mechanisms 11 and the third preload mechanisms 12 can adjust the preload force of the first bearing 7 and the third bearing 9 as needed.

[0030] The right end of the rear pressure cover 17 is provided with a first stepped groove corresponding to the number of the second pre-tightening mechanism 11, and the second pre-tightening mechanism 11 is arranged in the first stepped groove. The second pre-tightening mechanism 11 includes a second center rod 38, and a second step 39 is provided on the second center rod 38. A third groove is provided at the rear end of the second center rod 38, and a third retaining ring 40 is provided in the third groove. A second pressure ring 41 is provided on the left side of the third retaining ring 40, and the right end of the second pressure ring 41 abuts against the left side of the first stepped groove, and a plurality of second disc springs are provided between the second pressure ring 41 and the second step 39. 42, the third bearing 9 includes a third outer ring 43, the right end of the second center rod 38 is in contact with the third outer ring 43, the second center rod 38, the second disc spring 42, the second pressure ring 41 cooperate with the first step groove to form a second preload mechanism 11 for adjusting the preload force of the third bearing 9, the second center rod 38 has a certain interference fit with the right end face of the third bearing 9, after the third bearing 9 is installed, the second center rod 38 will move to the right, while the second pressure ring 41 is stationary, the second disc spring 42 will be compressed so that the second center rod 38 can provide a certain preload force for the third bearing 9.

[0031] A plurality of second stepped grooves are provided at the left end of the disc spring seat 19, and a number of second stepped holes corresponding to the second stepped grooves are provided on the piston seat 18. The second stepped grooves and the second stepped holes cooperate to form a disc spring cavity. A plurality of third preload mechanisms 12 are respectively arranged in the plurality of disc spring cavities. The third preload mechanism 12 includes a third center rod 21, the left end of the third center rod 21 abuts against the right end of the third outer ring 43, a third step 44 and a fourth step 45 are provided on the third center rod 21, a fourth groove is provided at the right end of the third center rod 21, a fourth retaining ring 46 is provided in the fourth groove, a third pressure ring 47 is provided on the left side of the fourth retaining ring 46, the right end of the third pressure ring 47 abuts against the left side of the second stepped hole, and a plurality of third disc springs 48 are provided between the third pressure ring 47 and the fourth step 45; A piston cavity is provided on the piston seat 18, and the piston cavity is connected with the second stepped hole. A piston ring 49 is movably arranged in the piston cavity. A circular hole is provided on the piston ring 49 for the third center rod 21 to pass through. The piston ring 49 is fixedly sleeved on the third center rod 21. A second pressurizing cavity 50 is provided on the left side of the piston ring 49, and a second pressure relief cavity 51 is provided on the right side of the piston ring 49. The second pressurizing cavity 50, the second pressure relief cavity 51, the piston ring 49 and the third center rod 21 cooperate to enable the piston ring 49 to move left and right. A vent hole 52 is provided on the piston seat 18, and the vent hole 52 is connected with the right end of the piston cavity. The other end of the vent hole 52 passes through the piston seat 18, so that gas can enter or flow out of the disc spring cavity, which is convenient for the piston ring 49 to slide left and right. The third disc spring 48 on the third preload mechanism 12 is installed after being compressed. In the absence of hydraulic oil, the third disc spring 48 has a tendency to release elastic potential energy to move the third center rod 21 to the left, and the bearing, the third center rod 21 and the third bearing 9 are relatively stationary, so that the third center rod 21 provides a certain leftward thrust to the third bearing 9, that is, the preload force required by the third bearing 9, and at the same time, the third pressure ring 47 also has a tendency to push the main preload mechanism 2 to move rightward, and the main preload mechanism 2 is threadedly connected to the hydraulic cylinder 5 through the rear pressure cover 17, so that the hydraulic cylinder 5 has a tendency to move to the right, and the hydraulic cylinder 5 can provide a rightward force to the bearing seat 6, thereby providing the required minimum preload force for the first bearing 7; When the second pressurizing chamber 50 and the second pressure relief chamber 51 begin to flow with hydraulic oil, the hydraulic oil flows into the second pressure relief chamber 51 to increase the pressure in the second pressure relief chamber 51, so that the thrust of the third center rod 21 to the left is mainly provided by the hydraulic pressure. At this time, the reaction force of the third bearing 9 on the third center rod 21 can provide a preload for the first bearing 7. The pressure of the second pressure relief chamber 51 can be adjusted according to the working conditions, so that the preload of the first bearing 7 and the third bearing 9 can be adjusted in real time. When installing the third bearing 9, hydraulic oil can be introduced into the second pressurizing chamber 50 to retract the third center rod 21. After the installation is completed, the pressure can be slowly released to facilitate the installation of the third bearing. If the hydraulic system fails, the third preload mechanism 12 can also provide the emergency required minimum preload for the preload of the first bearing 7 and the third bearing 9 to prevent the first bearing 7 and the third bearing 9 from losing their preload and being worn or even damaged.

[0032] A third oil groove 53 is provided on the outer side of the piston seat 18, and a plurality of fourth connecting holes 54 are provided on the piston seat 18. The third oil groove 53 is connected to the second pressure relief chamber 51 through the fourth connecting holes 54. A first oil filling hole 55 and a second oil filling hole 57 are provided on the hydraulic cylinder 5. The third oil groove 53 is connected to one end of the first oil filling hole 55, and the other end of the first oil filling hole 55 can be externally connected to a high-pressure oil pipe. The hydraulic oil can enter the third oil groove 53 from the first oil filling hole 55. The fourth connecting holes 54 are evenly distributed around the circumference, and then evenly enter the second pressure relief chamber 51 from the fourth connecting holes 54. The rear pressure cover 17 is provided with a fifth connecting hole 56, and the second pressurizing chamber 50 is connected with the second refueling hole 57 through the fifth connecting hole 56. One end of the fifth connecting hole 56 is connected with the second pressurizing chamber 50, and the other end of the fifth connecting hole 56 is connected with the right end of the second refueling hole 57. The other end of the second refueling hole 57 can be connected to an external high-pressure oil pipe, and the hydraulic oil can enter the second pressurizing chamber 50 from the second refueling hole 57 through the fifth connecting hole 56.

[0033] A first sealing groove is provided at the left end of the plunger housing 24, and a first sealing member 58 is provided on the first sealing groove. A plurality of second sealing grooves corresponding to the number of the first stepped holes are provided at the left end of the front gland 20, and the second sealing grooves are located outside the first stepped holes, and a second sealing member 59 is provided on the second sealing groove. The first sealing member 58 and the second sealing member 59 cooperate to form a sealing structure for sealing the first pressurizing chamber 22. A third sealing groove is provided at the right end of the plunger housing 24, and a third sealing member 60 is provided on the third sealing groove. The third sealing member 60 cooperates with the first sealing member 58 to form a sealing structure for sealing the first pressure relief chamber 23. A fourth sealing groove and a fifth sealing groove are provided at the left end of the piston ring 49, the fourth sealing groove is arranged on the inner side of the piston ring 49, the fifth sealing groove is arranged on the outer side of the piston ring 49, a fourth sealing member 61 is arranged on the fourth sealing groove, and a fifth sealing member 62 is arranged on the fifth sealing groove, a sixth sealing groove and a seventh sealing groove are provided at the right end of the rear pressure cover 17, the sixth sealing groove is arranged on the outer side of the piston cavity, the seventh sealing groove is arranged on the inner side of the piston cavity, a sixth sealing member 63 is arranged on the sixth sealing groove, and a seventh sealing member 69 is arranged on the seventh sealing groove, an eleventh sealing groove is provided in the middle part of the third center rod 21, an eleventh sealing groove is provided on the eleventh sealing groove, a twelfth sealing groove is provided on the left end of the third center rod 21, a twelfth sealing groove is provided on the twelfth sealing groove, and the fourth sealing member 61, the fifth sealing member 62, the seventh sealing member 69, the eleventh sealing member 71, the eleventh sealing member 71 and the sixth sealing member 63 cooperate to form a sealing structure for sealing the second pressurizing chamber 50; An eighth sealing groove and a ninth sealing groove are provided on the piston seat 18. The eighth sealing groove is provided on the outer side of the piston cavity and communicated with the piston cavity. The ninth sealing groove is provided on the inner side of the piston cavity and communicated with the piston cavity. An eighth sealing member 64 is provided on the eighth sealing groove. A ninth sealing member 65 is provided on the ninth sealing groove. The fourth sealing member 61, the fifth sealing member 62, the eighth sealing member 64 and the ninth sealing member 65 cooperate to form a sealing structure for sealing the second pressure relief cavity 51. A tenth sealing groove is opened on the left and right sides of the first oil groove 32, the second oil groove 68 and the third oil groove 53, and a tenth sealing member 66 is arranged on the tenth sealing groove. A thirteenth sealing groove is opened on the left end of the rear pressure cover 17, and the thirteenth sealing groove is located on the outer side of the left end of the fifth connecting hole 56. A thirteenth sealing member 70 is arranged on the thirteenth sealing groove, thereby preventing leakage of the hydraulic oil and maintaining the oil pressure of the hydraulic oil.

[0034] The piston ring 49 is provided with a plurality of connecting holes 73, which are evenly distributed around the circumference. The hydraulic oil first enters the outer cavity of the second pressure relief chamber 51 through the evenly distributed fourth connecting holes 54. The inner and outer cavities are pressurized together, which can make the hydraulic oil increase the leftward thrust of the piston ring 49 more stable and uniform, and then enter the inner cavity of the second pressure relief chamber 51 through the connecting holes 73. The third center rod 21 is provided with a locking nut 74 and a locking washer 75. The locking nut 74 is connected to the threaded joint on the surface of the third center rod 21. The locking nut 74, the locking washer 75 and the third center rod 21 cooperate to form a fixing structure for fixing the third center rod 21 and the piston ring 49. Two annular grooves 76 and a plurality of radial grooves 77 are provided at the right end of the rear pressure cover 17. The hydraulic oil will first flow into the outermost annular groove 76 and be evenly distributed in the oil groove network composed of the annular groove 76 and the radial groove 77, so that the hydraulic oil can enter the second pressurizing chamber 50 more smoothly and evenly, and the pressurization is more stable and uniform. The annular groove 76 is located in the piston chamber, and the two ends of the radial groove 77 are respectively connected to the two annular grooves 76.

[0035] Working principle: When the bearing preload mechanism of the high-temperature silk-making machine is used, when the first pressurizing chamber 22 enters oil and the first pressure relief chamber 23 exits oil, the plunger shell 24 will move to the right, thereby driving the first pressure ring 29 to move to the right, and the right end face of the first center rod 26 contacts the left end face of the second outer ring 67, so the first center rod 26 and the first step 27 remain stationary, thereby reducing the distance between the first step 27 and the first pressure ring 29, thereby compressing the first disc spring 30, and the first disc spring 30 tends to return to its original state, thereby increasing the preload force of the first center rod 26 on the second bearing 8. Similarly, When the first pressurizing chamber 22 discharges oil and the first pressure relief chamber 23 receives oil, the plunger housing 24 moves to the left, and the first disc spring 30 releases its elastic potential energy to deform in the direction of restoring its original shape, thereby driving the first compression ring 29 to move to the left, while the right end face of the first center rod 26 contacts the left end face of the second outer ring 67, so the first center rod 26 and the first step 27 remain stationary, thereby increasing the distance between the first step 27 and the first compression ring 29, thereby partially releasing the elastic potential energy of the first disc spring 30, thereby reducing the preload force of the first center rod 26 on the second bearing 8, and only providing the minimum preload force of the bearing; When the equipment is started and operated, hydraulic oil will enter the knife-feeding chamber 15 and the pressure will increase, while the hydraulic oil will flow out of the knife-retracting chamber 16 and the pressure will decrease, so that the hydraulic oil can enter the first oil groove 32 from the first oil inlet hole 34, and the first connecting holes 33 are evenly distributed around the circumference, so that the hydraulic oil can evenly flow into the first oil hole 31 through the first connecting holes 33, so that the lubricating oil can evenly flow into the corresponding first pressurizing chamber 22, and the lubricating oil in the first pressure relief chamber 23 can flow into the second oil groove 32 through the second connecting holes 35. The oil in the groove 68 then flows into the tool retracting chamber 16 through the third connecting holes 36 evenly distributed around the circumference, so that the first pressurizing chamber 22 is evenly filled with oil for pressurization and the first pressure relief chamber 23 is evenly discharged for pressure relief. When the equipment needs to be shut down, hydraulic oil enters the tool retracting chamber 16, the pressure increases, and the hydraulic oil outflow pressure in the tool feeding chamber 15 decreases. Similarly, oil can be discharged from the first pressurizing chamber 22 and oil can be entered from the first pressure relief chamber 23, so that when the equipment is running, a suitable preload force can be provided for the second bearing 8 according to the actual situation. When hydraulic oil is not passed, the third disc spring 48 tends to release elastic potential energy to move the third center rod 21 to the left, while the bearing, the third center rod 21 and the third bearing 9 are relatively stationary, so that the third center rod 21 provides a certain leftward thrust to the third bearing 9, that is, the preload force required by the third bearing 9, and at the same time, the third pressure ring 47 also tends to push the main preload mechanism 2 to move to the right, and the main preload mechanism 2 is threadedly connected to the hydraulic cylinder 5 through the rear pressure cover 17, so that the hydraulic cylinder 5 tends to move to the right, and the hydraulic cylinder 5 can provide a rightward force for the bearing seat 6, thereby providing the required minimum preload force for the first bearing 7. When hydraulic oil begins to pass into the second pressurizing chamber 50 and the second pressure relief chamber 51, the second pressure relief chamber 51 passes through The injection of hydraulic oil increases the pressure in the second pressure relief chamber 51, so that the thrust of the third center rod 21 to the left is mainly provided by the hydraulic pressure. At this time, the reaction force of the third bearing 9 on the third center rod 21 can provide a preload for the first bearing 7. The pressure in the second pressure relief chamber 51 can be adjusted according to the working conditions, so that the preload of the first bearing 7 and the third bearing 9 can be adjusted in real time. When installing the third bearing 9, hydraulic oil can be introduced into the second pressurizing chamber 50 to retract the third center rod 21. After the installation is completed, the pressure can be slowly released, which facilitates the installation of the third bearing. If the hydraulic system fails, the third preload mechanism 12 can also provide the emergency required minimum preload for the preload of the first bearing 7 and the third bearing 9, thereby preventing the first bearing 7 and the third bearing 9 from losing their preload and being worn or even damaged.

[0036] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bearing pre-tightening mechanism for a high-temperature silk-forming machine, comprising a main body (1), characterized in that: The main body (1) is provided with a tool feed cavity (15) and a tool retract cavity (16). The main body (1) comprises a housing (4) and a main shaft (3). A hydraulic cylinder (5) is arranged in the housing (4). A bearing seat (6) is threadedly connected to the right side of the hydraulic cylinder (5). A first bearing (7) is arranged on the inner side of the right end of the bearing seat (6). A second bearing (8) is arranged on the inner side of the left end of the bearing seat (6). A main preload mechanism (2) is arranged on the inner side of the right end of the hydraulic cylinder (5). The main preload mechanism (2) is arranged on the left side of the second bearing (8). A third bearing (9) is arranged on the left side of the preload mechanism (2); the main shaft (3) passes through the third bearing (9), the main preload mechanism (2), the second bearing (8) and the first bearing (7) in sequence from left to right; a plurality of first preload mechanisms (10) for adjusting the preload force of the second bearing (8) are arranged on the right side of the main preload mechanism (2); a plurality of second preload mechanisms (11) for adjusting the preload force of the first bearing (7) and a plurality of third preload mechanisms (12) for adjusting the preload force of the third bearing (9) are arranged on the left side of the main preload mechanism (2).

2. The bearing pre-tightening mechanism of the high temperature silk-making machine according to claim 1, characterized in that: The main pre-tightening mechanism (2) comprises a rear pressure cover (17), the rear pressure cover (17) is threadedly connected to the hydraulic cylinder (5), the right side of the rear pressure cover (17) is threadedly connected to a piston seat (18), the right side of the piston seat (18) is threadedly connected to a disc spring seat (19), the right side of the disc spring seat (19) is threadedly connected to a front pressure cover (20), a plurality of first step holes corresponding to the first pre-tightening mechanism (10) are formed in the front pressure cover (20), and the first pre-tightening mechanism (10) is located in the first step hole and slidably cooperates with the inner wall of the first step hole.

3. The bearing pre-tightening mechanism of the high temperature silk-making machine according to claim 2, characterized in that: A first pressurizing chamber (22) is provided on the left side of the first pre-tightening mechanism (10), and a first pressure relief chamber (23) is provided on the right side of the first pre-tightening mechanism (10). The first pre-tightening mechanism (10) comprises a plunger shell (24). The plunger shell (24) cooperates with the first pressure relief chamber (23) and the first pressurizing chamber (22) so that the plunger shell (24) can move left and right. A first retaining ring (25) and a first center rod (26) are provided in the plunger shell (24). The first center rod (26) is movably provided in the plunger shell (24). A third step groove is provided, a first groove is provided on the left side of the third step groove, the first retaining ring (25) is located in the first groove, a first step (27) is provided on the first center rod (26), a second groove is provided on the left end of the first center rod (26), a second retaining ring (28) is provided on the second groove, a first pressure ring (29) is provided on the right side of the second retaining ring (28), the left end of the first pressure ring (29) abuts against the right side of the third step groove, and a plurality of first disc springs (30) are provided between the first pressure ring (29) and the first step (27).

4. The bearing pre-tightening mechanism of the high temperature silk-making machine according to claim 3 is characterized in that: The second bearing (8) includes a second outer ring (67), the second outer ring (67) abuts against the right end of the first center rod (26), and the plunger housing (24), the first center rod (26), the first pressure ring (29) and the first disc spring (30) cooperate to form a first preload mechanism (10) for adjusting the preload force of the second bearing (8).

5. The bearing pre-tightening mechanism of the high temperature silk-making machine according to claim 3, characterized in that: The right end of the disc spring seat (19) is provided with first oil holes (31) corresponding to the number of the first preload mechanism (10), and the first oil holes (31) are connected to the first pressurizing chamber (22). The outer side of the disc spring seat (19) is provided with a first oil groove (32), and the disc spring seat (19) is provided with a plurality of first connecting holes (33). The first oil hole (31) is connected to the first oil groove (32) through the first connecting holes (33). The hydraulic cylinder (5) is provided with a first oil inlet hole (34), and the first oil groove (3 2) is connected to the tool feed chamber (15) through a first oil inlet hole (34), a second oil groove (68) is provided on the outer side of the front pressure cover (20), a number of second connecting holes (35) corresponding to the number of the first pressure relief chamber (23) is provided on the front pressure cover (20), the second oil groove (68) is connected to the first pressure relief chamber (23) through the second connecting hole (35), a plurality of third connecting holes (36) are provided on the hydraulic cylinder (5), and the tool retraction chamber (16) is connected to the second oil groove (68) through the third connecting hole (36).

6. The bearing pre-tightening mechanism of the high temperature silk-making machine according to claim 5, characterized in that: The right end of the rear pressure cover (17) is provided with a first stepped groove whose number corresponds to the second pre-tightening mechanism (11), the second pre-tightening mechanism (11) is arranged in the first stepped groove, the second pre-tightening mechanism (11) comprises a second center rod (38), a second step (39) is arranged on the second center rod (38), a third groove is arranged at the rear end of the second center rod (38), a third retaining ring (40) is arranged in the third groove, and a second pressure ring (41) is arranged on the left side of the third retaining ring (40) The right end of the second pressure ring (41) abuts against the left side of the first stepped groove, a plurality of second disc springs (42) are arranged between the second pressure ring (41) and the second step (39), the third bearing (9) includes a third outer ring (43), the right end of the second center rod (38) abuts against the third outer ring (43), the second center rod (38), the second disc spring (42), the second pressure ring (41) and the first stepped groove cooperate to form a second preload mechanism (11) for adjusting the preload force of the third bearing (9).

7. The bearing pre-tightening mechanism of the high temperature silk-making machine according to claim 6, characterized in that: The left end of the disc spring seat (19) is provided with a plurality of second stepped grooves, the piston seat (18) is provided with a number of second stepped holes corresponding to the second stepped grooves, the second stepped grooves and the second stepped holes cooperate to form a disc spring cavity, a plurality of the third pre-tightening mechanisms (12) are respectively arranged in the plurality of disc spring cavities, the third pre-tightening mechanisms (12) include a third center rod (21), the left end of the third center rod (21) abuts against the right end of the third outer ring (43), a third step (44) and a fourth step (45) are arranged on the third center rod (21), a fourth groove is provided at the right end of the third center rod (21), a fourth retaining ring (46) is arranged in the fourth groove, a third pressure ring (47) is arranged on the left side of the fourth retaining ring (46), the right end of the third pressure ring (47) abuts against the left side of the second stepped hole, and a plurality of third disc springs (48) are arranged between the third pressure ring (47) and the fourth step (45); The piston seat (18) is provided with a piston cavity, and the piston cavity is communicated with the second stepped hole. A piston ring (49) is movably arranged in the piston cavity. The piston ring (49) is provided with a circular hole for the third center rod (21) to pass through. The piston ring (49) is fixedly sleeved on the third center rod (21). A second pressurizing cavity (50) is provided on the left side of the piston ring (49), and a second pressure relief cavity (51) is provided on the right side of the piston ring (49). The second pressurizing cavity (50), the second pressure relief cavity (51), the piston ring (49) and the third center rod (21) cooperate to enable the piston ring (49) to move left and right. The piston seat (18) is provided with an air vent (52), and the air vent (52) is communicated with the right end of the piston cavity. The other end of the air vent (52) passes through the piston seat (18).

8. The bearing pre-tightening mechanism of the high temperature silk-making machine according to claim 7, characterized in that: A third oil groove (53) is provided on the outer side of the piston seat (18), a plurality of fourth connecting holes (54) are provided on the piston seat (18), the third oil groove (53) is communicated with the second pressure relief chamber (51) through the fourth connecting holes (54), a first oil filling hole (55) and a second oil filling hole (57) are provided on the hydraulic cylinder (5), the third oil groove (53) is communicated with one end of the first oil filling hole (55), a fifth connecting hole (56) is provided on the rear pressure cover (17), and the second pressure chamber (50) is communicated with the second oil filling hole (57) through the fifth connecting hole (56).

9. The bearing pre-tightening mechanism of the high temperature silk-making machine according to claim 7, characterized in that: A first sealing groove is formed at the left end of the plunger shell (24), and a first sealing member (58) is arranged on the first sealing groove; a plurality of second sealing grooves corresponding in number to the first stepped hole are formed at the left end of the front pressure cover (20), the second sealing grooves are located outside the first stepped hole, and a second sealing member (59) is arranged on the second sealing groove; the first sealing member (58) and the second sealing member (59) cooperate to form a sealing structure for sealing the first pressurizing chamber (22); a third sealing groove is formed at the right end of the plunger shell (24), and a third sealing member (60) is arranged on the third sealing groove; the third sealing member (60) cooperates with the first sealing member (58) to form a sealing structure for sealing the first pressure relief chamber (23); A fourth sealing groove and a fifth sealing groove are provided at the left end of the piston ring (49), the fourth sealing groove is provided on the inner side of the piston ring (49), the fifth sealing groove is provided on the outer side of the piston ring (49), a fourth sealing member (61) is provided on the fourth sealing groove, and a fifth sealing member (62) is provided on the fifth sealing groove. A sixth sealing groove and a seventh sealing groove are provided at the right end of the rear gland (17), the sixth sealing groove is provided on the outer side of the piston cavity, the seventh sealing groove is provided on the inner side of the piston cavity, the sixth sealing groove is provided on the sixth sealing groove, and the seventh sealing member (63) is provided on the seventh sealing groove. A seventh sealing member (69) is arranged on the sealing groove, an eleventh sealing groove is opened in the middle of the third center rod (21), an eleventh sealing member (71) is arranged on the eleventh sealing groove, a twelfth sealing groove is opened at the left end of the third center rod (21), a twelfth sealing member (72) is arranged on the twelfth sealing groove, and the fourth sealing member (61), the fifth sealing member (62), the seventh sealing member (69), the eleventh sealing member (71), the eleventh sealing member (71) and the sixth sealing member (63) cooperate to form a sealing structure for sealing the second pressurizing chamber (50); An eighth sealing groove and a ninth sealing groove are formed on the piston seat (18); the eighth sealing groove is formed on the outer side of the piston cavity and communicates with the piston cavity; the ninth sealing groove is formed on the inner side of the piston cavity and communicates with the piston cavity; an eighth sealing member (64) is provided on the eighth sealing groove; a ninth sealing member (65) is provided on the ninth sealing groove; the fourth sealing member (61), the fifth sealing member (62), the eighth sealing member (64) and the ninth sealing member (65) cooperate to form a sealing structure for sealing the second pressure relief cavity (51); A tenth sealing groove is provided on the left and right sides of the first oil groove (32), the second oil groove (68) and the third oil groove (53), and a tenth sealing member (66) is provided on the tenth sealing groove. A thirteenth sealing groove is provided on the left end of the rear pressure cover (17), and the thirteenth sealing groove is located on the outer side of the left end of the fifth connecting hole (56), and a thirteenth sealing member (70) is provided on the thirteenth sealing groove.

10. The bearing pre-tightening mechanism of the high temperature silk-making machine according to claim 7, characterized in that: The piston ring (49) is provided with a plurality of communicating holes (73); the third center rod (21) is provided with a locking nut (74) and a locking washer (75); the locking nut (74) is connected to the threaded portion of the surface of the third center rod (21); the locking nut (74), the locking washer (75) and the third center rod (21) cooperate to form a fixing structure for fixing the third center rod (21) and the piston ring (49); the right end of the rear gland (17) is provided with two annular grooves (76) and a plurality of radial grooves (77); the annular grooves (76) are located in the piston cavity; and the two ends of the radial grooves (77) are respectively connected to the two annular grooves (76).

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