Shaft end sealing device

Abstract

The utility model relates to the technical field of screening crusher sealing equipment, and discloses a shaft end sealing device which comprises a box body, two groups of split shaft sleeves and two groups of split end covers, a main shaft sleeve is arranged on the box body, the split shaft sleeves are sleeved on the outer side of the main shaft sleeve, and the two groups of split shaft sleeves are detachably connected with each other. A first labyrinth groove is formed in the inner end face of the split shaft sleeve, the split shaft sleeve is sleeved with the two split end covers, the two split end covers are detachably connected with each other, the inner ends of the split end covers are detachably connected with the box body, second labyrinth grooves are formed in the inner sides of the split end covers, and opening oil seals are arranged between the split end covers and the split shaft sleeve. And a grease injection assembly is arranged on the split end cover. The sealing device can be maintained on site, an old shaft sleeve does not need to be dismantled, the sealing effect can be enhanced, and the overhauling efficiency and effect are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing equipment for screening crushers, in particular to a shaft end sealing device. Background Art

[0002] The delayed coking unit is the main processing unit for oil refineries to increase the light oil yield and produce petroleum coke. The main equipment of the coking part is the heating furnace and the coke tower. The lower part of the coke tower is equipped with a screening crusher, which is generally a double-toothed roller structure.

[0003] At present, a sleeve is installed at the connection between the roller and the box of the screening crusher, and a split end cover is installed on the end face of the box. Two sets of open oil seals and felt rings are installed in the end cover. The rotating crushing roller sleeve, open oil seal and felt form a sealing structure to prevent the tar-water mixture inside the box from leaking to the outside. Due to long-term use and insufficient lubrication, the felt ring is first worn out and fails, which causes the tar-water mixture to wear the sleeve and the open oil seal, especially the coating of the sleeve will be washed, corroded and peeled off, and finally the seal will fail completely, and the de-tar water and coke powder will leak out from the end face of the split end cover, which not only causes serious pollution to the site, but also increases the workload of the staff to clean up.

[0004] There are at least the following problems in the prior art: First, the leakage of the tar-water mixture increases the safety hazard and the workload of inspection and repair, which brings great trouble and inconvenience to the maintenance work and greatly affects the appearance of the site; second, after the box sealing felt is worn, the site generally does not have the conditions to replace the box sealing felt, and it can only be replaced if the whole is returned to the factory; third, if the shaft sleeve needs to be replaced, the bearing box and bearing and other components of the crusher must be disassembled. The time is tight and the task is heavy. The disassembly is difficult and the requirements for maintenance personnel are relatively high. In the replacement process, it may be necessary to replace the parts damaged by improper disassembly. Not only will the maintenance workload increase, but also the maintenance time will be extended, thereby causing the risk of reduced production. Utility Model Content

[0005] The utility model aims at the deficiencies of the prior art and develops a shaft end sealing device. The utility model can be repaired on site without removing the old shaft sleeve, and can enhance the sealing effect, thereby effectively improving the efficiency and effect of maintenance.

[0006] The technical solution to the technical problem solved by the utility model is: a shaft end sealing device, comprising a box body, on which a main shaft sleeve is provided, and also comprising two groups of split shaft sleeves and two groups of split end covers, the split shaft sleeve is sleeved on the outer side of the main shaft sleeve, the two groups of split shaft sleeves are detachably connected to each other, the inner end surface of the split shaft sleeve is provided with a first labyrinth groove, the two groups of split end covers are sleeved on the outer side of the split shaft sleeve, the two groups of split end covers are detachably connected to each other, the inner ends of the split end covers are detachably connected to the box body, the inner sides of the split end covers are provided with a second labyrinth groove, an open oil seal is provided between the split end cover and the split shaft sleeve, and a grease injection component is provided on the split end cover.

[0007] As an optimization, the second labyrinth groove is arranged at one end of the inner side of the split end cover close to the box body, and an oil seal groove is arranged at one end of the inner side of the split end cover away from the box body, and two sets of open oil seals are arranged in the oil seal groove. By arranging the second labyrinth groove and the oil seal groove from the inside to the outside, the sealing effect can be improved, so that the first labyrinth groove and the second labyrinth groove can be connected, which is convenient for greasing and sealing the first labyrinth groove and the second labyrinth groove at the same time; by arranging the oil seal groove, it is convenient to install the open oil seal and store grease.

[0008] As an optimization, a split baffle is provided on the outer end surface of the split end cover, and two groups of split baffles are provided, and the two ends of the split baffle are respectively connected to the two groups of split end covers. By providing the split baffle, the oil seal groove can be closed to protect the open oil seal.

[0009] As an optimization, a gap is provided between the inner end surface of the split sleeve and the side surface of the housing. By providing the gap, wear can be reduced and the sealing effect can be improved.

[0010] As an optimization, the split end cover is provided with a first oil filling port and a second oil filling port, the first oil filling port is connected to the second labyrinth groove, the second oil filling port is connected to the oil seal groove, and the grease injection assembly includes a mounting plate, an oil cup, a first oil pipe and a second oil pipe, the mounting plate is detachably arranged on the housing by bolts, and two groups of oil cups are arranged on the mounting plate, the two ends of the first oil pipe are respectively connected to a group of oil cups and the first oil filling port by a ferrule joint, and the two ends of the second oil pipe are respectively connected to another group of oil cups and the second oil filling port by a ferrule joint. By providing the first oil filling port, the first oil pipe, the oil cup and the ferrule joint, grease can be added to the first labyrinth groove and the second labyrinth groove; by providing the second oil filling port, the second oil pipe, the oil cup and the ferrule joint, grease can be added to the oil seal groove; by providing the mounting plate, the oil cup can be conveniently fixed and installed, avoiding the use of electric welding and other operations on site during installation.

[0011] As an optimization, at least one set of sealing grooves is provided on the inner side of the split shaft sleeve, and an O-ring is provided in the sealing groove. By providing the sealing grooves and the O-rings, the sealing effect between the split shaft sleeve and the main shaft sleeve can be enhanced.

[0012] As an optimization, a positioning threaded hole is provided on the split shaft sleeve, a positioning screw is provided in the positioning threaded hole, and the inner end of the positioning screw abuts against the main shaft sleeve. By providing the positioning threaded hole and the positioning screw, the split shaft sleeve can be fixed on the main shaft sleeve to prevent it from falling off.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] By setting a split shaft sleeve, it can be easily installed on the main shaft sleeve, and the main shaft sleeve does not need to be removed during installation, and the disassembly and assembly are simple and time-saving; by setting a first labyrinth groove, the resistance along the way when the tar water flows to the oil seal can be increased, and part of the grease can be stored to enhance the sealing effect; by setting a split end cover, it can be convenient for on-site replacement and installation, and the bolt hole position of the split end cover is consistent with the old end cover, and no other changes are required on-site, and only the old end cover can be removed to complete the installation; by setting a second labyrinth groove, it can cooperate with the first labyrinth groove to further increase the resistance along the way when the tar water flows to the oil seal, and further enhance the sealing effect; by setting an open oil seal, a rotating sealing structure can be formed with the split shaft sleeve to enhance the sealing effect; by setting a grease injection component, the first labyrinth groove, the second labyrinth groove and the open oil seal can be greased, lubricated and sealed. The utility model can be repaired on-site without removing the old shaft sleeve, and can enhance the sealing effect, effectively improving the efficiency and effect of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of an embodiment of the utility model.

[0016] Figure 2 for Figure 1 Cross-sectional view along the AA direction.

[0017] Figure 3 for Figure 1 Cross-sectional view along direction BB.

[0018] Figure 4 for Figure 1 Cross-sectional view along CC direction.

[0019] Figure 5 for Figure 3 A partial enlarged view of area A.

[0020] Figure 6 for Figure 4 A partial enlarged view of area A.

[0021] Figure 7 It is a schematic structural diagram of a split shaft sleeve in an embodiment of the utility model.

[0022] In the figure: 1, housing; 2, main shaft sleeve; 3, split shaft sleeve; 4, split end cover; 5, first labyrinth groove; 6, second labyrinth groove; 7, open oil seal; 8, grease injection assembly; 9, oil seal groove; 10, split baffle; 11, first oil injection port; 12, second oil injection port; 13, sealing groove; 14, O-ring; 15, positioning threaded hole;

[0023] 81. Mounting plate; 82. Oil cup; 83. First oil pipe; 74. Second oil pipe. DETAILED DESCRIPTION

[0024] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0025] Example 1

[0026] Figures 1 to 7 An embodiment of the present utility model is as follows: Figures 1 to 7 As shown, a shaft end sealing device includes a housing 1, on which a main shaft sleeve 2 is provided, and also includes two groups of split shaft sleeves 3 and two groups of split end covers 4. The split shaft sleeve 3 is sleeved on the outer side of the main shaft sleeve 2, and the two groups of split shaft sleeves 3 are detachably connected to each other by a first bolt. The inner end surface of the split shaft sleeve 3 is provided with a first labyrinth groove 5, and the two groups of split end covers 4 are sleeved on the outer side of the split shaft sleeve 3. The two groups of split end covers 4 are detachably connected to each other by a second bolt. The inner end of the split end cover 4 is detachably connected to the housing 1 by a third bolt. A second labyrinth groove 6 is provided on the inner side of the split end cover 4, and an open oil seal 7 is provided between the split end cover 4 and the split shaft sleeve 3. The open oil seal 7 is made of fluororubber, which is resistant to high temperature and aging, and can increase the service life. A grease injection component 8 is provided on the split end cover 4.

[0027] By setting the split shaft sleeve 3, it can be conveniently installed on the main shaft sleeve 2, and there is no need to remove the main shaft sleeve 2 during installation, and the disassembly and assembly are simple and time-saving; by setting the first labyrinth groove 5, the resistance along the flow of tar water to the oil seal can be increased, and some grease can be stored to enhance the sealing effect; by setting the split end cover 4, it can be convenient for on-site replacement and installation, and the bolt hole position of the split end cover 4 is consistent with the old end cover, and no other changes are required on-site, only the old end cover can be removed to complete the installation; by setting the second labyrinth groove 6, it can cooperate with the first labyrinth groove 5 to further increase the resistance along the flow of tar water to the oil seal, and further enhance the sealing effect; by setting the open oil seal 7, a rotating sealing structure can be formed with the split shaft sleeve 3 to enhance the sealing effect; by setting the grease injection component 8, the first labyrinth groove 5, the second labyrinth groove 6 and the open oil seal 7 can be greased, lubricated and sealed.

[0028] like Figures 2 to 6As shown, the second labyrinth groove 6 is arranged at one end of the inner side of the split end cover 4 close to the box body 1, and an oil seal groove 9 is arranged at one end of the inner side of the split end cover 4 away from the box body 1, and two groups of open oil seals 7 are arranged oppositely in the oil seal groove 9. By arranging the second labyrinth groove 6 and the oil seal groove 9 from the inside to the outside, the sealing effect can be improved, so that the first labyrinth groove 5 and the second labyrinth groove 6 can be connected, and it is convenient to lubricate and seal the first labyrinth groove 5 and the second labyrinth groove 6 at the same time; by arranging the oil seal groove 9, the open oil seal 7 can be easily installed, and grease can be stored.

[0029] like Figures 1 to 6 As shown, a split baffle 10 for closing the oil seal groove 9 is provided on the outer end surface of the split end cover 4 through a third bolt, and two groups of split baffles 10 are provided, and the two ends of the split baffles 10 are respectively connected to the two groups of split end covers 4. By providing the split baffle 10, the oil seal groove 9 can be closed and the open oil seal 7 can be protected.

[0030] like Figures 2 to 6 As shown, a gap is provided between the inner end surface of the split sleeve 3 and the side surface of the housing 1, the gap distance is 0.5-1.5 mm, and grease is pre-coated in the gap. By providing the gap, wear can be reduced and the sealing effect can be improved.

[0031] like Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the split end cover 4 is provided with a first oil filling port 11 and a second oil filling port 12, the first oil filling port 11 is connected to the second labyrinth groove 6, the second oil filling port 12 is connected to the oil seal groove 9, the grease injection assembly 8 includes a mounting plate 81, an oil cup 82, a first oil pipe 83 and a second oil pipe 84, the mounting plate 81 is detachably arranged on the housing 1 by bolts, two groups of oil cups 82 are provided on the mounting plate 81, both ends of the first oil pipe 83 are connected to one group of oil cups 82 and the first oil filling port 11 respectively by a compression fitting, and both ends of the second oil pipe 84 are connected to the other group of oil cups 82 and the second oil filling port 12 respectively by a compression fitting. By providing a first oil filling port 11, a first oil pipe 83, an oil cup 82 and a ferrule joint, grease can be added to the first labyrinth groove 5 and the second labyrinth groove 6; by providing a second oil filling port 12, a second oil pipe 84, an oil cup 82 and a ferrule joint, grease can be added to the oil seal groove 9; by providing a mounting plate 81, the oil cup 82 can be conveniently fixed and installed, thereby avoiding the use of on-site hot work and electric welding during installation.

[0032] like Figures 2 to 7 As shown, the split sleeve 3 is treated with hard chrome plating on the surface, thereby improving the wear resistance of the contact part with the open oil seal 7. At least one set of sealing grooves 13 is provided on the inner side of the split sleeve 3, and an O-ring 14 is provided in the sealing groove 13. The O-ring 14 is made of fluororubber. By providing the sealing groove 13 and the O-ring 14, the sealing effect between the split sleeve 3 and the main sleeve 2 can be enhanced.

[0033] like Figure 2 and Figure 7 As shown, the split sleeve 3 is provided with a positioning threaded hole 15, and a positioning screw is provided in the positioning threaded hole 15, and the inner end of the positioning screw abuts against the main sleeve 2. By providing the positioning threaded hole 15 and the positioning screw, the split sleeve 3 can be fixed on the main sleeve 2 to prevent it from falling off.

[0034] During on-site installation, the staff only needs to remove the old end cover without removing the old main shaft sleeve 2 at the end of the crushing roller shaft; the staff first puts the O-ring 14 on the main shaft sleeve 2, and then covers the two groups of split shaft sleeves 3 on the main shaft sleeve 2 from the upper and lower sides in turn, connects the two groups of split shaft sleeves 3 through the first bolt, forms a complete shaft sleeve sleeve on the main shaft sleeve 2, and makes the O-ring 14 located in the sealing groove 13 for sealing, or directly applies sealant between the split shaft sleeve 3 and the main shaft sleeve 2 for sealing, and reserves a gap of 0.5 to 1.5 mm between the inner end face of the split shaft sleeve 3 and the side face of the housing 1, pre-applies grease to the gap and the first labyrinth groove 5, and then fixes it with positioning screws; then install the open oil seal 7 made of fluororubber, rotate it during installation so that the joint of the open oil seal 7 is in the upper position, and then put the split end cover 4 on the split shaft sleeve 2 from the upper and lower sides in turn. On the shaft sleeve 3, the two groups of split end covers 4 are connected by the second bolt to form a complete end cover sleeve mounted on the split shaft sleeve 3 for sealing, and the two groups of split end covers 4 are connected to the housing 1 by the third bolt, and the second labyrinth groove 6 and the oil seal groove 9 are pre-coated with grease for sealing; then, the two groups of split baffles 10 are installed on the outer end faces of the split end covers 4 from the left and right sides, and the two ends of the split baffles 10 are respectively connected to the two groups of split end covers 4; finally, the various components of the grease injection assembly 8 are installed to complete the sealing, and the oil cup 82 is installed on the side of the crusher housing 1, which is convenient for operation, simplifies the on-site installation process, and is convenient for daily grease injection, lubrication and sealing. The mounting plate 81 is installed on the housing 1 by bolts to avoid the use of hot work and electric welding at the installation site. It should be noted that each joint surface installed on site should be evenly coated with sealant to further improve the sealing effect. The utility model is simple to install and replace, does not need to dismantle the old shaft sleeve, does not need to change the on-site equipment, does not need to use fire on-site, and does not need to stop work on-site for maintenance. On-site replacement can be completed during the shutdown period of the crusher, which solves the problem of tar water leakage and effectively improves the efficiency and effect of maintenance.

[0035] The descriptions of the orientation or relative position relationship of the structure in the present invention, such as the orientation or relative position relationship indicated by "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

Claims

1. A shaft end sealing device, comprising a housing (1), on which a main shaft sleeve (2) is arranged, wherein: The invention also comprises two groups of split shaft sleeves (3) and two groups of split end covers (4), wherein the split shaft sleeves (3) are sleeved on the outer side of the main shaft sleeve (2), the two groups of split shaft sleeves (3) are detachably connected to each other, the inner end surface of the split shaft sleeve (3) is provided with a first labyrinth groove (5), the two groups of split end covers (4) are sleeved on the outer side of the split shaft sleeve (3), the two groups of split end covers (4) are detachably connected to each other, the inner end of the split end cover (4) is connected to the housing (1), the inner side of the split end cover (4) is provided with a second labyrinth groove (6), an open oil seal (7) is provided between the split end cover (4) and the split shaft sleeve (3), and a grease injection assembly (8) is provided on the split end cover (4).

2. The shaft end sealing device according to claim 1 is characterized in that: The second labyrinth groove (6) is arranged at one end of the inner side of the split end cover (4) close to the box body (1), and an oil seal groove (9) is arranged at one end of the inner side of the split end cover (4) away from the box body (1). Two groups of open oil seals (7) are arranged opposite to each other in the oil seal groove (9).

3. The shaft end sealing device according to claim 2 is characterized in that: A split baffle (10) is provided on the outer end surface of the split end cover (4), and two groups of split baffles (10) are provided. The two ends of the split baffles (10) are respectively connected to the two groups of split end covers (4).

4. The shaft end sealing device according to claim 3 is characterized in that: A gap is provided between the inner end surface of the split shaft sleeve (3) and the side surface of the box body (1).

5. The shaft end sealing device according to claim 4 is characterized in that: The split end cover (4) is provided with a first oil injection port (11) and a second oil injection port (12). The first oil injection port (11) is communicated with the second labyrinth groove (6), and the second oil injection port (12) is communicated with the oil seal groove (9). The grease injection assembly (8) comprises a mounting plate (81), an oil cup (82), a first oil pipe (83) and a second oil pipe (84). The mounting plate (81) is detachably mounted on the housing (1) by means of bolts. Two groups of oil cups (82) are provided on the mounting plate (81). Two ends of the first oil pipe (83) are respectively connected to one group of oil cups (82) and the first oil injection port (11) by means of a ferrule joint, and two ends of the second oil pipe (84) are respectively connected to the other group of oil cups (82) and the second oil injection port (12) by means of a ferrule joint.

6. The shaft end sealing device according to any one of claims 1 to 5, characterized in that: At least one set of sealing grooves (13) is arranged on the inner side of the split shaft sleeve (3), and an O-ring (14) is arranged in the sealing groove (13).

7. The shaft end sealing device according to claim 6 is characterized in that: A positioning threaded hole (15) is provided on the split shaft sleeve (3), a positioning screw is provided in the positioning threaded hole (15), and the inner end of the positioning screw abuts against the main shaft sleeve (2).

Images