Rotary seal cooling device for vacuum furnace

Abstract

The utility model discloses a rotary sealing cooling device for a vacuum furnace. The rotary sealing cooling device comprises a cooling disc, a mounting frame, a variable frequency motor, a rotating shaft, a fan, a fixing assembly and a cooling assembly, the mounting frame is arranged on the cooling disc; the variable-frequency motor is arranged on the mounting frame, an output shaft of the variable-frequency motor is connected with the upper end of the rotating shaft through the coupler, and the fan is arranged at the tail end of the rotating shaft in the furnace body; and the fixing assembly and the cooling assembly are arranged on the rotating shaft between the cooling disc and the mounting frame. The cooling disc serves as a first-stage furnace body for cooling, the service life of the sealing ring between the bottom of the fixing base and the framework seal and the cooling disc is prolonged, and the vacuum environment in the furnace is guaranteed through a multi-stage sealing structure; the double rotating bearings improve the concentricity of the rotating shaft, reduce the abrasion of the framework sealing gasket and prolong the service life; the fixed assembly is connected with the cooling assembly in a combined mode, rotary sealing of the rotary shaft is guaranteed, water can be effectively prevented from entering the vacuum furnace, the structure is stable, and the problems of high-temperature vacuum rotary sealing and water cooling circulation are solved in a segmented mode.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum furnace cooling, in particular to a rotary sealing cooling device for a vacuum furnace. Background Art

[0002] As is known to all, with the advancement of science and technology, products need to be rapidly cooled or the atmosphere in the furnace needs to be diffused during vacuum sintering, which requires a fan to rotate. However, after a period of use of a general rotating structure under high-temperature vacuum, the vacuum seal of the sealing structure is prone to failure at high temperatures, causing leakage of the furnace body seal, thereby affecting product quality. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a rotary sealing cooling device for a vacuum furnace, which has a stable structure and good sealing effect and solves the problem of high-temperature rotary sealing.

[0004] The technical solution adopted in this utility model is:

[0005] A rotary sealed cooling device for a vacuum furnace, comprising a cooling plate, a mounting frame, a variable frequency motor, a rotating shaft, a fan, a fixing assembly and a cooling assembly;

[0006] A circle of mounting holes is evenly arranged on the cooling plate, and the cooling plate is arranged on the furnace body through the mounting holes; the mounting bracket is arranged on the cooling plate; the frequency conversion motor is arranged on the mounting bracket, and the output shaft of the frequency conversion motor is connected to the upper end of the rotating shaft through a coupling, and the lower end of the rotating shaft passes through the center of the cooling plate and is arranged in the furnace body, and a hollow cooling cavity is provided in the center of the rotating shaft along the axial direction, and water inlet holes that pass through the cooling cavity perpendicularly are evenly arranged on the upper end of the rotating shaft along the circumference, and a return water ring groove is provided in the rotating shaft concentrically with the cooling cavity, and the bottom of the return water ring groove passes through the bottom of the cooling cavity, and the upper end of the return water ring groove is provided with a water outlet hole that passes through the outer wall of the rotating shaft and is parallel to the water inlet hole; the fan is arranged on the end of the rotating shaft in the furnace body; the fixing assembly and the cooling assembly are arranged on the rotating shaft between the cooling plate and the mounting bracket;

[0007] The fixing assembly includes a fixing seat, a rotating bearing, a skeleton seal, a lock nut and an inner retaining spring; the fixing seat is a sleeve-shaped structure with a flange at the bottom end, and the fixing seat is fixed to the center of the cooling plate through the bottom flange; the skeleton seal is arranged between the bottom end of the fixing seat and the rotating shaft; the rotating bearing is arranged on the rotating shaft in the upper end of the fixing seat; the lock nut and the inner retaining spring are matched and arranged on the rotating shaft above the rotating bearing;

[0008] The cooling assembly includes an outer sleeve, a water inlet nozzle, a water outlet nozzle, an upper pressure cover, a lower sealing cover, and an inner retaining ring; the lower end of the outer sleeve is provided with a flange corresponding to the upper end face of the fixed seat, and the outer sleeve and the upper end face of the fixed seat are connected by a screw with a threaded sleeve to set the outer sleeve on the rotating shaft above the lock nut; the upper pressure cover and the lower sealing cover are respectively arranged between the upper and lower ports of the outer sleeve and the rotating shaft; the water inlet nozzle and the water inlet hole at the upper end of the rotating shaft are arranged on the outer sleeve corresponding to the position of the water inlet nozzle, the inner retaining ring is arranged on the inner wall of the outer sleeve, and the inner retaining ring is provided with a hole corresponding to the water inlet nozzle, and lip sealing rings are provided between the rotating shaft and the outer sleeve on the upper and lower sides of the inner retaining ring; the water outlet nozzle is arranged on the outer sleeve at the lower side of the water inlet nozzle, and the water outlet nozzle corresponds to the water outlet hole position at the upper end of the return water ring groove of the rotating shaft, and multi-stage lip sealing rings are provided between the outer sleeve at the lower side of the water outlet nozzle and the rotating shaft.

[0009] Specifically, the mounting frame includes a padding block and a fixing frame. The padding block is symmetrically arranged on the cooling plate. The fixing frame is in an X-shaped structure. Both sides of the lower end of the fixing frame are fixed to the padding block by bolts.

[0010] Specifically, O-rings are provided at the bottom of the rotating fixed seat and between the skeleton seal and the cooling plate.

[0011] Specifically, two skeleton seals are arranged opposite to each other, and a sealing gasket is arranged between the two skeleton seals.

[0012] Specifically, the rotary bearing is arranged as a double bearing arrangement, and a bearing washer is arranged between the two rotary bearings.

[0013] Specifically, the fan is circular and includes an upper fixing plate, arc-shaped blades and a lower fixing ring plate. A hole matching the rotating shaft is provided at the center of the upper fixing plate, and the arc-shaped blades are provided between the upper fixing plate and the lower fixing ring plate in the same direction.

[0014] More specifically, the fan is arranged on the end of the rotating shaft through a fixing sleeve, a pad and a fastening bolt. The fixing sleeve is arranged on the end of the rotating shaft, the upper end of the fixing sleeve is placed on the lower side of the center of the fixing plate, the pad is arranged at the lower end of the fixing sleeve, and the fastening bolt passes through the center of the pad and is screwed to the end of the rotating shaft.

[0015] Due to the adoption of the above-mentioned technical solution, the utility model has the following advantages:

[0016] The cooling plate of the utility model serves as the first stage of furnace body cooling, improves the service life of the sealing ring between the bottom of the fixed seat and the skeleton seal and the cooling plate, and ensures the vacuum environment in the furnace through the multi-stage sealing structure; the double rotating bearings improve the concentricity of the rotating shaft, reduce the wear of the skeleton sealing gasket, and improve the service life; the connection between the fixed component and the cooling component ensures the rotary seal of the rotating shaft and can effectively prevent moisture from entering the vacuum furnace. The structure is stable and the problems of high-temperature vacuum rotary seal and water cooling cycle are solved in sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall schematic diagram of the present utility model.

[0018] Figure 2 It is a schematic diagram of the connection between the cooling disk, rotating shaft, fixed component and cooling component of the utility model.

[0019] Figure 3 yes Figure 2 Schematic cross-sectional view of .

[0020] Figure 4 yes Figure 3 A partial enlarged view of part A in the middle.

[0021] Figure 5 It is a cross-sectional schematic diagram of the rotating shaft of the present utility model.

[0022] Figure 6 It is a schematic diagram of the fan of the present invention.

[0023] In the figure: 1-cooling plate, 11-O-ring, 2-mounting frame, 21-pad, 22-fixed frame, 3-frequency motor, 4-rotating shaft, 41-cooling chamber, 42-water inlet, 43-return ring groove, 44-water outlet, 5-fan, 51-upper fixed plate, 52-arc blade, 53-lower fixed ring plate, 54-fixed sleeve, 55-pad, 56-fastening bolt, 6-fixed assembly, 61-fixed seat, 62-rotating bearing, 621-bearing washer, 63-skeleton seal, 631-sealing pad, 64-lock nut, 65-inner retaining ring, 7-cooling assembly, 71-outer sleeve, 72-upper pressure cover, 73-lower sealing cover, 74-water inlet nozzle, 75-water outlet nozzle, 76-inner retaining ring, 77-screw with threaded sleeve, 78-lip sealing ring. DETAILED DESCRIPTION

[0024] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments, which should not be used to limit the scope of protection of the present invention. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0025] Combined with attachment Figure 1-6 The rotary sealed cooling device for a vacuum furnace shown includes a cooling plate 1 , a mounting frame 2 , a variable frequency motor 3 , a rotating shaft 4 , a fan 5 , a fixing assembly 6 and a cooling assembly 7 .

[0026] A circle of mounting holes is evenly arranged on the cooling plate 1, and the cooling plate 1 is arranged on the furnace body through the mounting holes; the mounting frame 2 is arranged on the cooling plate 1, and the mounting frame 2 includes a padding block 21 and a fixing frame 22, the padding block 21 is symmetrically arranged on the cooling plate 1, and the fixing frame 22 is a "F"-shaped structure, and the lower ends of the fixing frame 22 are respectively fixed on the padding block 21 by bolts; the frequency conversion motor 3 is arranged on the fixing frame 22, and the output shaft of the frequency conversion motor 3 is connected to the upper end of the rotating shaft 4 through a coupling, and the lower end of the rotating shaft 4 passes through the center of the cooling plate 1 and is arranged in the furnace body, rotating A hollow cooling chamber 41 is provided at the center of the shaft 4 along the axial direction, and water inlet holes 42 that pass through the cooling chamber 41 are evenly provided along the circumference of the upper end of the rotating shaft 4. A return water ring groove 43 is provided concentrically with the cooling chamber 41 in the rotating shaft 4, and the bottom of the return water ring groove 43 passes through the bottom of the cooling chamber 41. A water outlet hole 44 that passes through the outer wall of the rotating shaft 4 and is parallel to the water inlet hole 42 is provided at the upper end of the return water ring groove 43; a fan 5 is provided on the end of the rotating shaft 4 in the furnace body; a fixing assembly 6 and a cooling assembly 7 are provided on the rotating shaft 4 between the cooling plate 1 and the mounting frame 2.

[0027] The fixing assembly 6 includes a fixing seat 61, a rotating bearing 62, a skeleton seal 63, a lock nut 64 and an internal retaining spring 65; the fixing seat 61 is a sleeve-shaped structure with a flange at the bottom end, and the fixing seat 61 is fixed to the center of the cooling disk 1 through the bottom end flange, and an O-ring 11 is arranged between the fixing base and the cooling disk 1; the two skeleton seals 63 are relatively arranged between the bottom end of the fixing seat 61 and the rotating shaft 4, a sealing gasket 631 is arranged between the two skeleton seals 63, and an O-ring 11 is arranged between the lower skeleton seal 63 and the cooling disk 1; the two rotating bearings 62 are arranged side by side on the rotating shaft 4 in the upper end of the fixing seat 61, and a bearing washer 621 is arranged between the two rotating bearings 62; the lock nut 64 and the internal retaining spring 65 are arranged on the rotating shaft 4 above the rotating bearing 62.

[0028] The cooling assembly 7 includes an outer sleeve 71, a water inlet nozzle 74, a water outlet nozzle 75, an upper pressure cover 72, a lower sealing cover 73, and an inner retaining ring 76; the lower end of the outer sleeve 71 is provided with a flange corresponding to the upper end surface of the fixing seat 61, and the outer sleeve 71 and the upper end surface of the fixing seat 61 are connected by a screw 77 with a threaded sleeve to set the outer sleeve 71 on the rotating shaft 4 above the lock nut 64; the upper pressure cover 72 and the lower sealing cover 73 are respectively arranged between the upper and lower ends of the outer sleeve 71 and the rotating shaft 4; the water inlet nozzle 74 is connected to the water inlet hole 42 at the upper end of the rotating shaft 4 The position is correspondingly set on the outer sleeve 71, the inner retaining ring 76 is set on the inner wall of the outer sleeve 71, and a hole corresponding to the water inlet nozzle 74 is set on the inner retaining ring 76. Lip-shaped sealing rings 78 are set between the rotating shaft 4 and the outer sleeve 71 on the upper and lower sides of the inner retaining ring 76; the water outlet nozzle 75 is set on the outer sleeve 71 on the lower side of the water inlet nozzle 74, and the water outlet nozzle 75 corresponds to the water outlet hole 44 at the upper end of the return water ring groove 43 of the rotating shaft 4, and a multi-stage lip-shaped sealing ring 78 is set between the outer sleeve 71 on the lower side of the water outlet nozzle 75 and the rotating shaft 4.

[0029] Preferably, the fan 5 is circular and includes an upper fixing plate 51, curved blades 52 and a lower fixing ring plate 53. A hole is provided in the center of the upper fixing plate 51 to cooperate with the rotating shaft 4, and the curved blades 52 are provided in the same direction between the upper fixing plate 51 and the lower fixing ring plate 53.

[0030] Preferably, the fan 5 is arranged on the end of the rotating shaft 4 through a fixing sleeve 54, a pad 55 and a fastening bolt 56. The fixing sleeve 54 is sleeved on the end of the rotating shaft 4, the upper end of the fixing sleeve 54 is placed on the lower side of the center of the fixing plate, the pad 55 is arranged at the lower end of the fixing sleeve 54, and the fastening bolt 56 passes through the center of the pad 55 and is screwed to the end of the rotating shaft 4.

[0031] The utility model is a rotary sealed cooling device for a vacuum furnace. When working, the frequency conversion motor 3 drives the rotating shaft 4 to rotate, thereby driving the lower fan 5 to rotate and circulate the hot air in the furnace; at the same time, cooling water enters the sealed space formed by the inner retaining ring 76 and the lip sealing ring 78 through the water inlet nozzle 74, and then enters the cooling chamber 41 from the water inlet hole 42 on the rotating shaft 4 to reach the bottom of the rotating shaft 4. The cooling water then enters the return water ring groove 43 upward and is discharged from the water outlet nozzle 75, exchanging heat with the heat in the vacuum furnace and taking away the heat from the bottom; the upper sealed space is sealed by two lip sealing rings 78 arranged on the upper and lower sides of the water inlet nozzle 74 and two lip sealing rings 78 on the lower side of the water outlet nozzle 75, and then the upper pressure cover 72 is fixed and pressed on the upper end of the outer sleeve 71 by bolts to prevent high water pressure from ejecting; the lower sealed space is compressed by the lower sealing cover 73 through the sealing frame arranged between the rotating shaft 4 and the fixed seat 61, and then prevents return water leakage by the O-ring 11 arranged between the sealing frame and the cooling plate 1 and the fixed seat 61 and the cold zone plate, thereby forming a cooling circuit.

[0032] The parts not described in detail in this utility model are prior art.

[0033] The embodiments selected herein for the purpose of disclosing the invention of the present utility model are currently considered appropriate. However, it should be understood that the present utility model is intended to include all changes and improvements of the embodiments that fall within the scope of the present concept and utility model.

Claims

1. A rotary sealed cooling device for a vacuum furnace, characterized in that: Includes a cooling plate, a mounting frame, a variable frequency motor, a rotating shaft, a fan, a fixing assembly and a cooling assembly; A circle of mounting holes is evenly arranged on the cooling plate, and the cooling plate is arranged on the furnace body through the mounting holes; the mounting bracket is arranged on the cooling plate; the frequency conversion motor is arranged on the mounting bracket, and the output shaft of the frequency conversion motor is connected to the upper end of the rotating shaft through a coupling, and the lower end of the rotating shaft passes through the center of the cooling plate and is arranged in the furnace body, and a hollow cooling cavity is provided in the center of the rotating shaft along the axial direction, and water inlet holes that pass through the cooling cavity perpendicularly are evenly arranged on the upper end of the rotating shaft along the circumference, and a return water ring groove is provided in the rotating shaft concentrically with the cooling cavity, and the bottom of the return water ring groove passes through the bottom of the cooling cavity, and the upper end of the return water ring groove is provided with a water outlet hole that passes through the outer wall of the rotating shaft and is parallel to the water inlet hole; the fan is arranged on the end of the rotating shaft in the furnace body; the fixing assembly and the cooling assembly are arranged on the rotating shaft between the cooling plate and the mounting bracket; The fixing assembly includes a fixing seat, a rotating bearing, a skeleton seal, a lock nut and an inner retaining spring; the fixing seat is a sleeve-shaped structure with a flange at the bottom end, and the fixing seat is fixed to the center of the cooling plate through the bottom flange; the skeleton seal is arranged between the bottom end of the fixing seat and the rotating shaft; the rotating bearing is arranged on the rotating shaft in the upper end of the fixing seat; the lock nut and the inner retaining spring are matched and arranged on the rotating shaft above the rotating bearing; The cooling assembly includes an outer sleeve, a water inlet nozzle, a water outlet nozzle, an upper pressure cover, a lower sealing cover, and an inner retaining ring; the lower end of the outer sleeve is provided with a flange corresponding to the upper end face of the fixed seat, and the outer sleeve and the upper end face of the fixed seat are connected by a screw with a threaded sleeve to set the outer sleeve on the rotating shaft above the lock nut; the upper pressure cover and the lower sealing cover are respectively arranged between the upper and lower ports of the outer sleeve and the rotating shaft; the water inlet nozzle and the water inlet hole at the upper end of the rotating shaft are arranged on the outer sleeve corresponding to the position of the water inlet nozzle, the inner retaining ring is arranged on the inner wall of the outer sleeve, and the inner retaining ring is provided with a hole corresponding to the water inlet nozzle, and lip sealing rings are provided between the rotating shaft and the outer sleeve on the upper and lower sides of the inner retaining ring; the water outlet nozzle is arranged on the outer sleeve at the lower side of the water inlet nozzle, and the water outlet nozzle corresponds to the water outlet hole position at the upper end of the return water ring groove of the rotating shaft, and multi-stage lip sealing rings are provided between the outer sleeve at the lower side of the water outlet nozzle and the rotating shaft.

2. The rotary sealed cooling device for a vacuum furnace according to claim 1, characterized in that: The mounting frame includes a padding block and a fixing frame. The padding block is symmetrically arranged on the cooling plate. The fixing frame is in an X-shaped structure. Both sides of the lower end of the fixing frame are fixed to the padding block by bolts.

3. The rotary sealed cooling device for a vacuum furnace according to claim 1, characterized in that: O-shaped sealing rings are arranged between the bottom of the fixing seat and the frame seal and the cooling plate.

4. The rotary sealed cooling device for a vacuum furnace according to claim 1, characterized in that: Two skeleton seals are arranged opposite to each other, and a sealing gasket is arranged between the two skeleton seals.

5. The rotary sealed cooling device for a vacuum furnace according to claim 1, characterized in that: The rotary bearing is arranged as a double bearing arrangement, with a bearing washer arranged between the two rotary bearings.

6. The rotary sealed cooling device for a vacuum furnace according to claim 1, characterized in that: The fan is circular and includes an upper fixing plate, arc-shaped blades and a lower fixing ring plate. A hole matching the rotating shaft is provided in the center of the upper fixing plate. The arc-shaped blades are arranged in the same direction between the upper fixing plate and the lower fixing ring plate.

7. The rotary sealed cooling device for a vacuum furnace according to claim 6, characterized in that: The fan is arranged on the end of the rotating shaft through a fixing sleeve, a pad and a fastening bolt. The fixing sleeve is arranged on the end of the rotating shaft, the upper end of the fixing sleeve is placed on the lower side of the center of the fixing plate, the pad is arranged at the lower end of the fixing sleeve, and the fastening bolt passes through the center of the pad and is screwed to the end of the rotating shaft.

Images