CN110315386A - A kind of Novel electric spindle cooling device - Google Patents

Abstract

The invention relates to a novel electric spindle cooling device, which consists of (1) spindle shaft body, (2) spindle rotor, (3) spindle stator, (4) spiral cooling water jacket, (5) spiral cooling water jacket inlet, (6) ) Spiral cooling water jacket outlet, (7) support bearing, (8) front end of main shaft, (9) lower side vent hole, (10) central vent hole, (11) upper side vent hole. The spindle system is equipped with a spiral water jacket on the outside of the stator. The upper side of the spiral water jacket is the cooling water inlet, and the lower side is the cooling water outlet. The industrial water cooler provides cooling fluid to circulate in the cooling water jacket to remove heat. At the same time, there are central ventilation holes, upper ventilation holes and lower ventilation holes at the tail of the main shaft. The three ventilation holes are internally connected, and the central ventilation hole is fed with cooling air. The wind flows freely in the shaft body to cool the shaft core. The cooling effect of the invention is better and more remarkable, the heating of the shaft core is reduced, the service life of the electric spindle is improved, and the working performance is enhanced.

Description

A New Type of Electric Spindle Cooling Device

technical field

The invention relates to the field of industrial cooling, in particular to an electric spindle cooling device.

Background technique

The electric spindle is a technology that integrates the machine tool spindle and the spindle motor in the field of CNC machine tools. This kind of transmission structure of the spindle motor and the machine tool spindle "integrates two into one", so that the spindle components can be separated from the transmission system and the overall structure of the machine tool. Relatively independent from the middle, it is one of the key components of high-speed machining of CNC machine tools, and its working performance greatly affects the high-speed machining performance of the entire CNC machine tool.

Since the electric spindle integrates the motor into the spindle unit, and the speed is very high, a large amount of heat will be generated during operation, which will cause the temperature rise of the electric spindle, deteriorate the thermal characteristics and dynamic characteristics of the electric spindle, and affect the normal operation of the electric spindle. Among them, the position of the shaft core is seriously heated. At present, the cooling method of the electric spindle is only water cooling, most of which cannot sufficiently cool the position of the shaft core, and because the flow of the cooling liquid is not easy to clean impurities, this invention will provide a comprehensive cooling method.

Contents of the invention

The purpose of the present invention is to provide a new electric spindle cooling device, which has a better cooling effect and a more convenient cleaning method compared with the traditional cooling device.

To achieve the above object, the present invention provides the following schemes:

The position of the shaft core is used to process the through holes that communicate with each other to facilitate the passage of cooling gas inside the electric spindle, thereby fully cooling the shaft center. The cooling air is passed through the central port of the three holes, and the free-flowing gas brings The internal heat is taken away, and it is naturally discharged from the body through the exhaust ports on the upper and lower sides, which is convenient for operation. At the same time, a spiral water jacket is placed outside the stator of the electric spindle. The inlet of the spiral water jacket is connected to the industrial water cooler, and the outlet of the spiral water jacket is also connected to the industrial water cooler. The cooling water is used to circulate the circulating coolant in the spiral water jacket. The heat generated at the stator position is cooled. Achieve comprehensive cooling effect, ensure the low-temperature operation of the electric spindle, and improve the high-speed working quality of the CNC machine tool.

Preferably, the spiral water jacket is installed outside the stator of the spindle system.

Preferably, the spiral water jacket is provided with a spiral cooling water jacket inlet and a spiral cooling water jacket outlet.

Preferably, the structure of the main shaft body of the main shaft system is required to meet the requirement that there are three ventilation holes at the tail position, namely the central ventilation hole, the upper side ventilation hole, and the lower side ventilation hole, and the three ventilation holes are internally connected.

Preferably, the position of the central vent hole is connected to an industrial air cooler to blow in cooling air, the wind flows freely in the shaft body to cool the shaft core, and the air is blown out of the shaft core through the upper side vent hole and the lower side vent hole .

Preferably, the upper side of the spiral water jacket is the inlet of the spiral cooling water jacket, the position of the spiral cooling water jacket is connected to the industrial water cooler, the outlet of the spiral cooling water jacket is also connected to the industrial water cooler, and the cooling water circulates in the water jacket Achieve water cooling effect.

Preferably, 7. When cleaning the position of the spiral water jacket, it only needs to be removed and cleaned, which avoids the trouble of cleaning. Vent locations eliminate the need for cleaning.

Compared with the prior art, the present invention has achieved the following technical effects:

1. A spiral water tank is arranged on the outside of the stator to facilitate the cooling of the stator position, so that the shaft core and the stator are cooled. Fully cool down the heating position when the electric spindle is working;

2. It adopts the method of processing three through holes on the shaft core to connect with each other, which facilitates the introduction of cooling gas, and achieves better cooling effect through cooling water and cooling gas. It is a comprehensive cooling device. It ensures that the electric spindle is fully cooled from the inside to the outside, and the cooling is more comprehensive;

3. Due to the use of gas cooling inside, the trouble of cleaning is eliminated, and the cooling water jacket can be removed for external cleaning. The cleaning of the equipment is more concise and easy to operate, and the cleaning step is eliminated at the position of the shaft core.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Attached Figure 1: Schematic diagram of the cooling device for the electric spindle;

Attached Figure 2: Partial enlarged view of the spiral cooling water jacket mechanism;

Attached Figure 3: Partial enlarged view of the main shaft;

In the figure: 1. Spindle shaft body 2. Spindle rotor 3. Spindle stator 4. Spiral cooling water jacket 5. Spiral cooling water jacket inlet 6. Spiral cooling water jacket outlet 7. Support bearing 8. Spindle front end 9. Lower air hole 10. Central vent 11. Upper side vent.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The purpose of the present invention is to provide a new type of electric spindle cooling device, which can fully cool the shaft core where the electric spindle generates a lot of heat during the working process, and provide a high-quality and stable working environment for CNC machine tools.

In order to make the above objects, features and advantages of the present invention clearer and easier to understand, the following will be described in detail in conjunction with the accompanying drawings.

The structural composition of the present invention is shown in Fig. 1, Fig. 2 and Fig. 3. The electric spindle cooling device consists of the spindle shaft body (1), the spindle rotor (2), the spindle stator (3), the spiral cooling water jacket (4), the spiral cooling water jacket inlet (5), and the spiral cooling water jacket outlet (6) , a support bearing (7), a main shaft front end (8), a lower air vent (9), a central air vent (10), and an upper air vent (11). The main shaft shaft body (1) is equipped with a spiral water jacket (4) outside the spindle stator (3) as shown in the figure, and the cooling water is used for water cooling in the spiral water jacket to achieve the water cooling effect on the stator. At the same time, there are three ventilation holes at the tail of the main shaft body (1), the lower ventilation hole (9), the central ventilation hole (10), and the upper ventilation hole (11). Cool the spindle.

The working process of the present invention is as follows:

When the electric spindle is working, the bearing of the electric spindle will generate a lot of heat when it rotates at high speed, which will cause the temperature of the spindle to rise, and the cutting tool installed at the end of the electric spindle will also generate a lot of heat during high-speed cutting. In addition, the rotor dissipates heat The condition is poor, and it is directly installed on the spindle, so the heating phenomenon is serious. These factors may cause thermal deformation of the spindle, so we should do our best to cool down.

In this design, when the rotor moves, the heat is transferred to the stator and the housing through the air gap, and the spiral cooling water jacket (4) is fixed on the outside of the main shaft stator (3) of the spindle system, and the spiral cooling water jacket (4) The upper end of the spiral cooling water jacket inlet (5) is connected to the industrial water cooler, and the lower end of the cooling water jacket (4), namely the spiral cooling water jacket outlet (6) is also connected to the industrial water cooler. The industrial water cooler provides cooling liquid in the cooling water jacket (4 ), the heat of the main shaft stator (3) is taken away by the cooling water circulation, and the temperature of the main shaft stator (3) is lowered to complete the cooling of the electric main shaft. This solution not only cools the main shaft stator (3) and the main shaft shaft body (1), but also indirectly completes the cooling effect on the rotating stator. At the same time, an industrial air cooler is connected to the central vent (10) to blow in cooling gas. The cooling gas flows freely through the spindle body (1) to cool the shaft core. The hot gas passes through the lower vent hole (9) and the upper The side vents (11) discharge the spindle body (1) and cool the spindle again. To achieve a comprehensive cooling effect, effectively cool the parts of the spindle body (1) of the electric spindle that generate a large amount of heat during operation.

Claims (4)

1. a kind of Novel electric spindle cooling device, including main shaft axis body and spiral water jacket, pass through cooling in the spindle shaft body Gas is cooled down, and the spiral water jacket is passed through cooling liquid and is cooled down, to reach comprehensive cooling, accurately to operational heat position It is cooled down.

2. Novel electric spindle cooling device according to claim 1, which is characterized in that the spiral water jacket is mounted on main shaft On the outside of system stator；Spiral water jacket is provided with spiral cooling jacket entrance and the outlet of spiral cooling jacket；The spiral water jacket it is upper Side is the entrance of spiral cooling jacket, and the position access industrial water cooling unit of spiral cooling jacket, the outlet of spiral cooling jacket also connects Enter industrial water cooling unit, cooling water circulates in water jacket reaches water cooling effect.

3. Novel electric spindle cooling device according to claim 1, which is characterized in that the main shaft axis body of the axis system Structural requirement will meet tail position and be provided with 3 ventholes, be central air vents, upside venthole, downside venthole respectively, and 3 A venthole internal switching；It is characterized in that, the position access industrial Air cooler of the central air vents is blown into cooling wind, wind exists Flow freely in axis body to do the effect of cooling central spindle, by upside venthole and downside venthole blow out air to central spindle outside.

4. Novel electric spindle cooling device according to claim 2, which is characterized in that when the spiral water jacket position is cleared up Cleaning is removed, cleaning trouble is avoided, ventilation hole site then eliminates cleaning.