KR101065288B1 - Vacuum pump of cooling - Google Patents

Abstract

The present invention relates to a cooled vacuum pump. More specifically, by providing a cooling means inside the vacuum pump, it is possible to prevent the appearance of the overall vacuum pump from growing large, and by having a secondary cooling means, it is possible to cool the heat generated in the vacuum pump more efficiently. In addition, the present invention relates to a cooling vacuum pump that can prevent the extension of life and damage of components constituting the vacuum pump by automatically supplying lubricating oil to the bearings and gears, etc. assembled to the rotating shaft during the operation of the vacuum pump.

Cooling, Vacuum Pumps, Screws, Water Jackets, Lubricants, Housings

Description

Vacuum pump of cooling

The present invention relates to a cooled vacuum pump. More specifically, a water jacket that efficiently lowers the heat generated during operation of the vacuum pump using cooling water is provided inside the vacuum pump, and lubricant oil can be automatically supplied to bearings and gears fitted to the rotary shaft of the vacuum pump. It relates to a cooled vacuum pump.

As is well known, the vacuum pump means a means for forcibly transporting a gas by using a pressure difference. Hereinafter, a configuration of a vacuum pump conventionally implemented will be described with reference to FIG. 1.

The conventional vacuum pump is provided with an inlet 102 and an outlet 104 at the upper and lower sides, and a housing 100 having a compression space 105 formed thereon, and installed inside the housing 100. Drive gear 106 and a driven shaft 108, each of which is provided with a screw 114, so as to compress the drive gear 110 for transmitting the power of the drive shaft 106 to the driven shaft 108 when the power source is generated And a driven gear 112.

Referring to the operation relationship of the vacuum pump configured as described above, the drive shaft 106 is rotated when the power source is generated, the drive gear 110 assembled to the drive shaft 106 is rotated to be engaged with the drive gear 110 The gear 112 is co-rotated, and the driven shaft 108 is rotated by the rotation of the driven gear 112.

By rotating in the state in which the screw 114 provided in the drive shaft 106 and the driven shaft 108 are engaged with each other by the above operation, the air pressure of the compression space 105 is lower than the external air pressure.

On the other hand, during the operation of the vacuum pump configured as described above, the heat of compression is generated, and if the heat of the vacuum pump is not properly cooled, the squeeze between the screw 114 and the housing 100 and the screw 114 may occur. As a result, there was a problem that the vacuum pump is broken.

In addition, bearings 116a and 116b are inserted into outer circumferential surfaces of the drive shaft 106 and the driven shaft 108, and the bearings 116a and 116b and the drive shaft 106 and the driven shaft 108 are supported. Gears 110 and 112 fitted to the outer circumferential surface of) should be lubricated to prevent breakage due to friction and corrosion, but to bearings 116a and 116b and gears 110 and 112 installed inside the housing 100. Refueling directly has been a very difficult problem.

The present invention to solve the above problems is to provide a cooling vacuum pump that can be installed inside the vacuum pump to more efficiently cool the heat generated during operation of the vacuum pump.

In another aspect, the present invention is to provide a vacuum pump that can be supplied to the inside of the vacuum pump to support the smooth rotation of the rotary shaft and the lubricant to automatically supply the lubricant to the gear to drive the rotary shaft and the like.

In order to achieve the above object, the present invention includes a housing, and a drive shaft and a driven shaft, each of which is provided with a screw so as to compress the gas by rotating when power is generated by the driving source, which is installed inside the housing. In a vacuum pump,

A water jacket is installed inside the housing to cool the heat generated from the vacuum pump with cooling water supplied from the outside; The water jacket has a rectangular shape and includes a casing having a through hole for passing the drive shaft and a driven shaft therein and a receiving space for accommodating the coolant around the through hole, wherein one side of the casing is disposed in the housing. A water supply hole for flowing the cooling water introduced through the first flow path formed into the accommodation space; The other side of the casing is characterized in that the discharge hole for discharging the cooling water contained in the accommodation space to the second flow path formed in the housing.

In addition, the present invention comprises a third housing for storing the lubricant under the housing; A thread formed on an outer circumferential surface of the drive shaft and the driven shaft; A passage for introducing lubricating oil stored in the third housing in the drive shaft and the driven shaft; A discharge hole is formed in communication with the passage and for discharging the lubricating oil introduced through the passage to the outside.

According to the present invention, by providing a cooling means inside the vacuum pump, the overall appearance of the vacuum pump can be prevented from increasing, and by having a secondary cooling means, the heat generated in the vacuum pump can be more efficiently cooled. Bring it.

In addition, the present invention, by automatically supplying lubricating oil to the bearings and gears, etc. assembled to the rotating shaft during the operation of the vacuum pump brings the effect of preventing the extension of life and damage of the components constituting the vacuum pump in advance.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a view showing the configuration of a cooling vacuum pump according to the present invention, Figure 3 is a view showing three-dimensional configuration of the water jacket provided in the cooling vacuum pump according to the present invention.

As shown, the cooled vacuum pump has an inlet 16 and an outlet (not shown) at the top and the bottom thereof, and a housing 15 having a compression space 17 formed thereon, and an interior of the housing 15. Drive shaft 18 and driven shaft 20 and driven shaft 20 and a power source provided with a screw 26 on each of them so as to compress the gas are supplied with power from the outside to generate power of the drive shaft 18 when the power is generated. It comprises a drive gear 22 and the driven gear 24 to be transmitted to 20).

The housing 15 is divided into a first housing 10, a second housing 12, and a third housing 14 to be assembled to form an external shape of a cooled vacuum pump. The first passage 34 and the second passage 46 are formed at both sides of the second housing 12.

The first flow path 34 is for sending the cooling water to the water jacket 35 installed inside the first housing 10, and the detailed configuration of the water jacket 35 is shown in FIG. 3.

The water jacket 35 is a primary means for cooling the heat generated during operation of the vacuum pump. The water jacket 35 includes a casing 36, a receiving space 38, a water supply hole 42 through which cooling water is introduced, and a discharge hole 44 for sending the cooling water to a chamber 52 to be described later.

The casing 36 constitutes an outer shape of the water jacket 35, and two through holes 40 are formed, and the driving shaft 18 and the driven shaft 20 are fitted through the through holes 40. .

One side of the casing 36 is in communication with the first flow path 34 is formed with a water supply hole 42 for sending the cooling water to the receiving space (38). The water supply hole 42 is formed in both directions to communicate with the receiving space 38 may be formed in plurality as necessary. Cooling water introduced through the water supply hole 42 flows into the receiving space 38. The accommodation space 38 is a place where the cooling water is stored for a predetermined time to cool the heat generated during the operation of the vacuum pump. The coolant introduced into the accommodation space 38 is discharged into the discharge hole 44 by the coolant continuously flowing in the accommodation space 38 for a predetermined time according to the circulation method. The discharge hole 44 is positioned to communicate with the second flow passage 46 formed in the second housing 12. The discharge hole 44 is also formed in both directions to be the same as the water supply hole 42, it may be formed in plural as necessary.

As described above, the second passage 46 is connected to the discharge hole 44 of the water jacket 35 at one end thereof, and a connection pipe 48 is positioned at the other end thereof. The connecting pipe 48 is assembled with the second housing 12 in a state located at the other end of the second flow passage 46, and serves to send the cooling water flowing out of the second flow passage 46 to the water supply valve 50. to be. The water supply valve 50 is connected to the chamber 52 formed in the first housing 10. The chamber 52 is a secondary means for cooling the heat generated during operation of the vacuum pump. The chamber 52 is made by digging a groove on the outer circumferential surface of the vacuum pump and the open chamber 52 is assembled to seal the cover 56 in the manner of bolting or the like. The chamber 52 stores the cooling water flowing through the water supply valve 50 to be the same as the water jacket 35 for a predetermined time, and then discharges the discharge valve 54 located at the top of the chamber 52 by the cooling water continuously. It flows through.

Meanwhile, a passage 30 through which lubricating oil can flow into the first bearing 19a and the second bearing 19b and the drive gear 22 and the driven gear 24 in the drive shaft 18 and the driven shaft 20. ) And a discharge hole 32 are formed, and the structure of the drive shaft 18 and the driven shaft 20 are the same, so that one structure (drive shaft) will be described.

The lower end of the drive shaft 18 is formed with a predetermined length of thread (18a), and is fastened to the cap 28. Inlet hole 28a is formed at one side of the cap 28. The inflow hole 28a is a means for sending the lubricating oil accumulated in the third housing 14 to the drive shaft 18. A passage 30 is formed in the drive shaft 18. The passage 30 is formed to be recessed by a predetermined length, and the lubricant oil rises along the passage 30 due to the rotational force when the driving shaft 18 rotates and is sent to the discharge hole 32 located above the driving shaft 18. For sake. The discharge hole 32 is formed in communication with the passage 30 formed in the drive shaft 18. That is, the lubricating oil raised up the passage 30 by the rotation of the drive shaft 18 flows down the outer circumferential surface of the drive shaft 18 through the discharge hole 32 and the first bearing 19a sequentially inserted into the drive shaft 18. It penetrates into the drive gear 22 and the second bearing 19b to perform lubricating oil.

The use state of the cooling vacuum pump configured as described above will be described with reference to FIGS. 4 and 5.

 First, the driving sequence of the vacuum pump is schematically described. First, when the driving source receives power from the outside to generate power, the driving shaft 18 is rotated to rotate the driving gear 22 assembled at one end of the driving shaft 18. Subsequently, the driven gear 24 meshed with the driving gear 22 rotates, and then the driven shaft 20 rotates in association with the rotation of the driven gear 24. Thereafter, the screw 26 provided in the drive shaft 18 and the driven shaft 20 are rotated in engagement with each other, so that the air pressure in the compression space is lower than the external air pressure. At this time, the gas from the inlet passage 16 into the compression space. Inlet is compressed and then discharged through an outlet (not shown).

Cooling water is supplied to the water jacket 35 installed inside the housing 15 to cool the heat generated during operation of the vacuum pump as described above, and with reference to FIG. 4, the coolant through the water jacket 35. Let's look at the flow. As shown, when the coolant is injected, the coolant enters through the first channel 34 of the second housing 12 and the water jacket through the water supply hole 42 communicating with the first channel 34. Cooling water flows into the receiving space 38 of the (35). Since the cooling water inflow of the cooling vacuum pump is circulated as described above, the cooling water flowing into the accommodation space 38 cools the heat of the vacuum pump and is continuously flowed through the first flow path 34. It exits to the discharge hole 44. Subsequently, the cooling water discharged as shown in FIG. 5 flows out through the second flow passage 46 communicating with the discharge hole 44, and passes through the connecting pipe 48 to the chamber 52 formed in the first housing 10. Inflow. After that, the cooling water gradually fills up to allow the secondary cooling to proceed to cool the heat of the vacuum pump, and when more than a certain amount of water is charged, it flows out through the discharge valve 54 and the cooling water discharged to the outside It proceeds in a circulation manner flowing into the water jacket 35 through the first passage 34.

On the other hand, when the drive shaft 18 is rotated during operation of the vacuum pump as described above, the lubricating oil introduced into the inlet hole 28a of the cap 28 is carried on the screw thread 18a formed at the lower end of the drive shaft 18. It will flow down. The lubricating oil flowing down continuously is positioned in the passage 30 formed at the end of the drive shaft 18, and ascends through the passage 30 formed in the drive shaft 18 due to the rotational force, and is discharged through the discharge hole 32. In addition, the circulating oil flows down the outer circumferential surface of the drive shaft 18 and sequentially lubricates the first bearing 19a, the drive gear 22, and the second bearing 19b fitted to the outer circumferential surface of the drive shaft 18. In addition, the driven shaft 20 which rotates in conjunction with the drive shaft 18 performs the same operation as the drive shaft 18, so description thereof will be omitted.

1 is a view showing the configuration of a conventional vacuum pump

2 is a view showing the configuration of a cooling vacuum pump according to the present invention

3 is a view showing three-dimensionally the configuration of the water jacket provided in the cooling vacuum pump according to the present invention

Figure 4 is a view showing the flow of cooling water to the water jacket provided in the cooling vacuum pump according to the present invention

5 is a view showing a state of use of the coolant vacuum pump according to the present invention

<Description of Major Symbols in Drawing>

       15: housing 18: drive shaft

       20: driven shaft 26: screw

       28: cap 28a: inlet hole

       30: passage 32: discharge hole

       35: water jacket 42: water supply hole

       44: discharge hole

Claims (2)

A housing 15 configured to be divided into first to third housings 10, 12, and 14, and a screw 26 installed in each of the housings 15 so as to be rotated when power is generated by a driving source to compress the gas. In the cooling vacuum pump comprising a drive shaft 18 and the driven shaft 20 is provided, A water jacket 35 is installed inside the housing 15 to cool the heat generated from the vacuum pump with cooling water supplied from the outside; The water jacket 35 has a rectangular shape and has a through hole 40 through which the drive shaft 18 and the driven shaft 20 pass, and a receiving space accommodating the cooling water around the through hole 40. (38) is formed of a casing 36 formed, One side of the casing 36 is formed with a water supply hole 42 for flowing the coolant flowing through the first passage 34 formed in the housing 15 to the receiving space 38; A discharge hole 44 is formed at the other side of the casing 36 to discharge the cooling water contained in the accommodation space 38 to the second flow passage 46 formed in the housing 15; An outer circumferential surface of the first housing 10 is hermetically sealed by a cover 56 in a state in which the chamber 52 is recessed; One end of the water supply valve 50 is connected to the chamber 52, and the other end of the water supply valve 50 is connected to the second flow passage 46 and the connection pipe 48, and the discharge hole 44 is connected to the chamber 52. Cooling vacuum pump, characterized in that configured to cool the heat generated by the vacuum pump is supplied and stored discharged through. The method of claim 1, A third housing (14) for storing lubricating oil under the housing (15); Threads 18a and 20a formed on the outer circumferential surfaces of the drive shaft 18 and the driven shaft 20; A passage (30) for introducing lubricant stored in the third housing (14) in the drive shaft (18) and the driven shaft (20); Cooling vacuum pump, characterized in that the discharge hole (32) in communication with the passage (30) for discharging the lubricating oil introduced through the passage (30) to the outer peripheral surface of the drive shaft (18).

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