Sealing main shaft cooling structure

Abstract

The utility model discloses a sealing main shaft cooling structure, which belongs to the technical field of main shafts and structurally comprises a main shaft cooling mechanism, the main shaft cooling mechanism comprises a rotating joint, an air pipe joint, an air inlet pipe and an air pipe fixing block, the rotating joint is arranged on a fixing flange at the rear end of a main shaft, and an adapter flange is arranged at the front end of the main shaft. A main shaft sleeve is arranged on the outer side of the main shaft, an air pipe fixing block is arranged in an inner cavity of the main shaft and divides the inner cavity of the main shaft into a front end cavity and a rear end cavity, a plurality of air pipe connectors are arranged inside and outside a rotating connector, a plurality of through holes are formed in the air pipe fixing block, and one end of an air inlet pipe is connected with one air pipe connector inside the rotating connector. And the other end of the air pipe penetrates through one through hole in the air pipe fixing block and then is communicated with the front-end cavity. According to the sealing main shaft cooling structure, the main shaft is cooled through cold air, thermal deformation caused by temperature rise of the main shaft is avoided, and machining size errors cannot be affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to a main shaft technical field especially a sealed main shaft cooling structure. BACKGROUND

[0002] At present, the main shaft rotates, and a rotary oil seal is installed between the main shaft and the main shaft sleeve for sealing, the main shaft rotation causes the main shaft to rub against the rotary oil seal, a large amount of heat is generated by the friction, the heat causes the temperature of the main shaft to rise, the temperature rise of the main shaft causes thermal elongation, which causes machining size error, most of the products on the market are water cooling and oil cooling, and only the main shaft sleeve can be cooled, and there is no effective cooling method for machining in special sealing environment, especially in the environment where oil and water are not allowed. SUMMARY

[0003] The technical task of the utility model is to provide a sealed main shaft cooling structure, which has the characteristics of cooling the main shaft by cold air, avoiding thermal deformation caused by temperature rise of the main shaft, and not affecting machining size error.

[0004] The utility model discloses a technical scheme that solves the technical problems: it includes main shaft cooling mechanism, the main shaft cooling mechanism includes rotary joint, gas pipe joint, intake pipe, gas pipe fixed block, the rotary joint is arranged on the fixed flange of the rear end of the main shaft, the front end of the main shaft is provided with the adapter flange, the outside of the main shaft is provided with the main shaft sleeve, the gas pipe fixed block is arranged in the inner chamber of the main shaft, the inner chamber of the main shaft is divided into front end cavity and rear end cavity, the rotary joint is internally and externally provided with a plurality of gas pipe joints, a plurality of through holes are formed in the gas pipe fixed block, one end of the intake pipe is connected with one of the gas pipe joints in the rotary joint, and the other end passes through one of the through holes in the gas pipe fixed block and communicates with the front end cavity.

[0005] It also includes main shaft sleeve cooling mechanism, the main shaft sleeve cooling mechanism includes cooling jacket, speed regulating joint, cold gas inlet channel, cold gas outlet channel, the cooling jacket is arranged at the rear end of the main shaft sleeve, the speed regulating joint, the air inlet channel and the exhaust hole are arranged on the cooling jacket, the speed regulating joint communicates with the air inlet channel, the air inlet channel communicates with the first end of the cold gas inlet channel, the exhaust hole communicates with the last end of the cold gas outlet channel, the last end of the cold gas inlet channel communicates with the first end of the cold gas outlet channel, and the cold gas inlet channel and the cold gas outlet channel are respectively formed in the main shaft sleeve.

[0006] The air inlet channel on the main shaft sleeve communicates with the annular cooling jacket groove.

[0007] The cold air inlet channel includes cylindrical holes and annular grooves of the main sleeve. There are multiple cylindrical holes, which are evenly distributed along the circumference of the main sleeve. The annular grooves of the main sleeve are located at the ends of the multiple cylindrical holes and are connected to them. The annular grooves of the main sleeve are also connected to the cooling outlet channel.

[0008] The aforementioned cold air outlet channels include multiple channels, which are evenly distributed along the circumference of the main sleeve. Each cold air outlet channel includes a first outlet, a main sleeve groove, and a second outlet. The first outlet and the second outlet are respectively connected to the main sleeve groove. The other end of the first outlet is connected to the main sleeve annular groove of the cold air inlet channel, and the second outlet is connected to the exhaust hole on the cooling sleeve.

[0009] A dust cover is provided on the main spindle, a rotary oil seal is installed at the lower end of the dust cover, and an upper pressure cover is provided at the lower end of the dust cover. The rotary oil seal is fixed to the dust cover by a pressure plate, and the upper pressure cover is fixed to the main spindle sleeve. The dust cover is designed with multiple annular grooves on the outside.

[0010] Compared with the prior art, the sealing spindle cooling structure of this utility model has the following outstanding advantages: by designing a two-way cooling system, the spindle and spindle sleeve are cooled. Low-temperature air is introduced into the spindle and spindle sleeve. The low-temperature air is obtained through a turbine device or air conditioner. The low-temperature air carries away the heat generated on the outer surface of the spindle and spindle sleeve, and at the same time, it replaces the hot air sealed in the spindle and spindle sleeve with cold air. This heat exchange process is ongoing in real time.

[0011] The dust cover is designed with an annular groove on the outside, which increases the heat dissipation area and drives the air to rotate when the spindle rotates, which can generate wind and exhaust the hot air at the rotating oil seal, thereby cooling the dust cover. Due to the air flow, the heat on the upper part of the spindle sleeve can be carried away, thus achieving a cooling effect. Attached Figure Description

[0012] Appendix Figure 1 It is a three-dimensional sealed spindle cooling structure Figure 1 ;

[0013] Appendix Figure 2 It is a three-dimensional sealed spindle cooling structure Figure 2 ;

[0014] Appendix Figure 3 This is a top view of the sealed spindle cooling structure;

[0015] Appendix Figure 4 yes Figure 3 The AA section view is shown below;

[0016] Appendix Figure 5 yes Figure 3 The CC section view shown;

[0017] AppendixFigure 6 is Figure 3 B-B cross-sectional view shown in the figure;

[0018] attached Figure 7 is the main shaft sleeve solid Figure 1 ;

[0019] attached Figure 8 is the main shaft sleeve solid Figure 2 ;

[0020] attached Figure 9 is the cooling jacket solid drawing;

[0021] Reference signs: 1, rotary joint, 2, air pipe joint, 3, air inlet pipe, 4, air pipe fixing block, 41, through hole, 5, main shaft, 51, front end cavity, 52, rear end cavity, 53, groove, 6, fixed flange, 7, adapter flange, 8, main shaft sleeve, 9, cooling jacket, 10, speed regulating joint, 11, air inlet channel, 12, exhaust hole, 131, cylindrical hole, 132, main shaft sleeve annular groove, 141, first outlet, 142, main shaft sleeve groove, 143, second outlet, 15, dust cover, 151, dust cover annular groove, 16, rotary oil seal, 17, upper gland, 18, pressing plate, 19, toothed belt pulley. DETAILED DESCRIPTION

[0022] Referring to the drawings attached to the specification Figure 1 to the attached Figure 9 A sealed main shaft cooling structure of the utility model is described in detail as follows.

[0023] The sealed main shaft cooling structure of the utility model, the structure includes main shaft cooling mechanism, the main shaft cooling mechanism includes rotary joint 1, air pipe joint 2, air inlet pipe 3, air pipe fixing block 4, rotary joint 1 is arranged on the fixed flange 6 of the rear end of main shaft 5, the front end of main shaft 5 is provided with adapter flange 7, the outside of main shaft 5 is provided with main shaft sleeve 8, air pipe fixing block 4 is arranged in the inner cavity of main shaft, and the inner cavity of main shaft is divided into front end cavity 51 and rear end cavity 52, rotary joint 1 is provided with five air pipe joints 2 inside and outside, and five-channel rotary joint is formed, a plurality of through holes 41 are formed in air pipe fixing block 4, one end of air inlet pipe 3 is connected with one of the air pipe joints inside rotary joint 1, and the other end passes through one of the through holes in air pipe fixing block 4 and communicates with front end cavity 51.

[0024] The main shaft sleeve cooling mechanism comprises a cooling sleeve 9, a speed joint 10, a cold air inlet channel and a cold air outlet channel. The cooling sleeve 9 is arranged at the rear end of the main shaft sleeve 8. The speed joint 10, an air inlet channel 11 and an exhaust hole 12 are arranged on the cooling sleeve 9. The speed joint 10 is communicated with the air inlet channel 11. The air inlet channel 11 is communicated with the first end of the cold air inlet channel. The exhaust hole 12 is communicated with the last end of the cold air outlet channel. The last end of the cold air inlet channel is communicated with the first end of the cold air outlet channel. The cold air inlet channel and the cold air outlet channel are respectively arranged on the main shaft sleeve 8.

[0025] The air inlet channel 11 is an annular cooling sleeve groove arranged on the front end surface of the cooling sleeve 9. The speed joint 10 is communicated with the annular cooling sleeve groove. The cold air inlet channel on the main shaft sleeve 8 is communicated with the annular cooling sleeve groove.

[0026] The cold air inlet channel comprises a plurality of cylindrical holes 131 and a main shaft sleeve annular groove 132. The plurality of cylindrical holes 131 are uniformly distributed along the circumferential direction of the main shaft sleeve 8. The main shaft sleeve annular groove 132 is located at the last end of the plurality of cylindrical holes 131 and is communicated with the plurality of cylindrical holes 131. The main shaft sleeve annular groove 132 is also communicated with the cold air outlet channel.

[0027] The cold air outlet channel comprises a plurality of channels which are uniformly distributed along the circumferential direction of the main shaft sleeve 8. Each cold air outlet channel comprises a first outlet 141, a main shaft sleeve groove 142 and a second outlet 143. The first outlet 141 and the second outlet 143 are respectively communicated with the main shaft sleeve groove 142. The first outlet 141 is communicated with the main shaft sleeve annular groove 132 of the cold air inlet channel at the other end. The second outlet 143 is communicated with the exhaust hole 12 on the cooling sleeve 9.

[0028] The front end of the main shaft 5 is internally designed with a groove 53 to increase the heat dissipation area, the main shaft 5 is provided with a dust cover 15, the lower end of the dust cover 15 is provided with a rotary oil seal 16, the lower end of the dust cover 15 is provided with an upper pressing cover 17, the rotary oil seal 16 is fixed on the dust cover 15 by a pressing plate 18, the upper pressing cover 17 is fixed on the main shaft sleeve 8, the adapter flange 7 and the main shaft 5 are sealed by an O-shaped ring, the dust cover 15 and the main shaft 5 are sealed by an O-shaped ring, the upper pressing cover 17 and the main shaft sleeve 8 are provided with an O-shaped ring, and the front end of the main shaft is further sealed. The rear end of the main shaft 5 is provided with a toothed belt wheel 19, the rear end of the toothed belt wheel 19 is provided with a fixed flange 6, the fixed flange 6 is provided with a rotary joint 1, and the rotary joint 1 is internally and externally provided with an air pipe joint 2. The fixed flange 6 and the main shaft 5 are designed with an O-shaped ring. Further, the rear end of the main shaft 5 is sealed. The dust cover 15 is externally designed with a plurality of dust cover annular grooves 151, and the pressing plate 6 forms a stepped section, further, since the rotating speed of the main shaft 5 is the same, the linear speed at different diameters is not the same, thereby forming wind, so as to take away the heat on the surface of the dust cover 15, and the wind formed at the pressing plate 18 can also air cool the upper pressing cover 17 which generates heat by friction.

[0029] The main working process is as follows. Cooling air enters the air inlet channel 11 in the cooling jacket 9 through the speed regulating joint 10, passes through the plurality of cylindrical holes 131 in the cold air inlet channel on the main shaft sleeve 8 into the main shaft sleeve annular groove 132, and then flows out of the cold air through the first outlet 141, the main shaft sleeve groove 142 and the second outlet 143, and is discharged through the exhaust hole 12 of the cooling jacket 9. The cold air realizes the cooling of the main shaft sleeve 8. The cooling principle is to take away the hot air outside the cooling jacket 9. Secondly, the main shaft sleeve 9 supplies cold air to the main shaft sleeve to exchange heat, thereby realizing the cooling of the main shaft sleeve 9, and also making the main shaft sleeve 9 in a low-temperature environment. This is the external cooling of the main shaft sleeve. The internal cooling of the main shaft 5 is that the cold air enters the front end cavity 51 in the main shaft inner cavity through the air pipe joint 10 on the rotary joint 1 and the air inlet pipe 3, and is delivered to the inner surface of the main shaft. With the entry of the cold air, the hot air in the front end cavity 51 is discharged to the rear end cavity 52 in the main shaft inner cavity through the plurality of through holes 41 in the air pipe fixing block 4, and then is discharged along the remaining air pipe joint 10, thereby further reducing the temperature inside the main shaft, so as to realize sealing. The whole cooling process is safe and reliable, does not need special and complex electrical control, does not need oil and water as coolants, the whole process is pollution-free and non-consumptive, can be safely used in environments where water and oil are not allowed, and especially can better reflect its advantages in environments where water is easy to explode.

[0030] The sealing main shaft cooling structure is mainly suitable for the cooling of a sealing main shaft, and can be used on a lathe main shaft, a machining center main shaft and other rotary sealing mechanisms, and is especially a cooling structure used in an oil-free and water-free environment.

[0031] The above-mentioned embodiments are only used for understanding the present application, and are not intended to limit the technical solutions described in the present application. Based on the technical solutions described in the claims, those skilled in the related art can make various changes or modifications. All equivalent changes or modifications should be covered within the protection scope of the claims of the present application. The present application does not describe in detail, which is the known technology of the technical personnel in the art.

Claims

1. A sealed spindle cooling structure, characterized in that: The device includes a spindle cooling mechanism, which comprises a rotary joint, an air pipe connector, an air inlet pipe, and an air pipe fixing block. The rotary joint is mounted on a fixed flange at the rear end of the spindle, and an adapter flange is mounted at the front end of the spindle. A spindle sleeve is mounted on the outer side of the spindle. The air pipe fixing block is mounted inside the spindle cavity, dividing the spindle cavity into a front cavity and a rear cavity. Multiple air pipe connectors are mounted both inside and outside the rotary joint. Multiple through holes are mounted on the air pipe fixing block. One end of the air inlet pipe is connected to one of the air pipe connectors inside the rotary joint, and the other end passes through one of the through holes on the air pipe fixing block and communicates with the front cavity.

2. The sealed spindle cooling structure according to claim 1, characterized in that: It also includes a spindle sleeve cooling mechanism, which includes a cooling sleeve, a speed control connector, a cold air inlet channel, and a cold air outlet channel. The cooling sleeve is located at the rear end of the spindle sleeve and has a speed control connector, an air inlet channel, and an exhaust port. The speed control connector is connected to the air inlet channel, the air inlet channel is connected to the beginning of the cold air inlet channel, the exhaust port is connected to the end of the cold air outlet channel, and the end of the cold air inlet channel is connected to the beginning of the cold air outlet channel. The cold air inlet channel and the cold air outlet channel are respectively opened on the spindle sleeve.

3. The sealed spindle cooling structure according to claim 2, characterized in that: The air intake channel is an annular cooling sleeve groove opened on the front end face of the cooling sleeve. The speed control connector is connected to the annular cooling sleeve groove, and the cold air inlet channel on the main shaft sleeve is connected to the annular cooling sleeve groove.

4. The sealed spindle cooling structure according to claim 2, characterized in that: The cold air inlet channel includes cylindrical holes and annular grooves of the main sleeve. There are multiple cylindrical holes, which are evenly distributed along the circumference of the main sleeve. The annular grooves of the main sleeve are located at the ends of the multiple cylindrical holes and are connected to them. The annular grooves of the main sleeve are also connected to the cooling outlet channel.

5. A sealed spindle cooling structure according to claim 4, characterized in that: The aforementioned cold air outlet channels include multiple channels, which are evenly distributed along the circumference of the main sleeve. Each cold air outlet channel includes a first outlet, a main sleeve groove, and a second outlet. The first outlet and the second outlet are respectively connected to the main sleeve groove. The other end of the first outlet is connected to the main sleeve annular groove of the cold air inlet channel, and the second outlet is connected to the exhaust hole on the cooling sleeve.

6. The sealed spindle cooling structure according to claim 1, characterized in that: A dust cover is provided on the main spindle, a rotary oil seal is installed at the lower end of the dust cover, and an upper pressure cover is provided at the lower end of the dust cover. The rotary oil seal is fixed to the dust cover by a pressure plate, and the upper pressure cover is fixed to the main spindle sleeve. The dust cover is designed with multiple annular grooves on the outside.

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