CN203526564U - Spiral dual-cooling-channel high speed motorized spindle - Google Patents

Abstract

The utility model relates to the field of high-speed and high-precision machining, in particular to a high-speed electric spindle with spiral double cooling passages. It consists of a rotating shaft, a motor rotor, a motor stator, a shaft sleeve, and a housing. There is a motor rotor on the outside of the rotating shaft, and the motor stator is on the outside of the motor rotor. The stator sleeve is set between the stator and the housing. There are cooling water channels on the stator sleeve and the front bearing seat. The characteristics are: the cooling water channels are respectively set on the Between the housing and the sleeve and between the housing and the front bearing seat, there are two groups of cooling channels for convective cooling of the cooling liquid, and the water channels are all spirally arranged on the inner surface of the housing and the outer surface of the front bearing seat. The front end of the electric spindle is provided with a water inlet of one cooling water channel and a water outlet of another cooling water channel, and the rear end of the electric spindle is provided with corresponding water outlets and water inlets of two sets of cooling water channels. In the utility model, the electric spindle is cooled by convective flow of cooling liquid in two groups of cooling water channels, so that the overall temperature of the electric spindle is kept constant and the cooling effect is good.

Description

A high-speed electric spindle with spiral double cooling channels

technical field

The utility model relates to a high-speed electric spindle with double cooling passages, in particular to a high-speed electric spindle with spiral double-inlet and double-outlet cooling passages. the

Background technique

High-speed precision electric spindles are widely used, involving machine tool industry, electronic processing industry, mold processing industry and other fields that require high-speed rotation and high-speed machining. The electric spindle integrates the main shaft and the motor. It has a high speed and a small size. It generates a lot of heat during operation. If the temperature cannot be cooled, the motor temperature will be too high, and even the bearing will burn out. the

When the electric spindle is working, the cooling water flows continuously in the cooling water channel to take away the heat from the built-in motor and bearings. However, most of the water jacket structures currently used are one-way flow, that is, one water inlet and one water outlet. When the load is small or the speed is low, it can maintain the temperature balance inside the electric spindle. Once the load is too large or the speed is too high during processing, it is difficult for the single-flow cooling method to take away the excess heat, resulting in an increase in the internal temperature of the electric spindle. Inconsistency in temperature will deteriorate the static and dynamic characteristics of the electric spindle, affect the accuracy of the electric spindle, and directly cause the bearing to burn out in severe cases. the

Utility model content

The purpose of the utility model is to provide a high-speed precision electric spindle with spiral double cooling channels, which has good cooling effect and stable internal temperature control of the spindle. the

The technical solution adopted by the utility model to solve the technical problem is: a high-speed electric spindle with spiral double cooling channels, which is composed of a rotating shaft, a motor rotor, a motor stator, a shaft sleeve, a housing, etc., and the motor rotor is arranged on the outside of the rotating shaft. The outside of the motor rotor is the motor stator, the stator sleeve is set between the stator and the casing, and there are cooling water channels on the stator sleeve and the front bearing seat. The characteristics are: the cooling water channels are respectively set between the casing and the sleeve and Between the casing and the front bearing seat, there are two sets of cooling channels for convection of coolant, and the water channels are all spirally arranged on the inner surface of the casing and the outer surface of the front bearing seat. the

The front end of the electric spindle is provided with a water inlet of a cooling water channel and a water outlet of another cooling water channel, and the rear end of the electric spindle is provided with two sets of corresponding water outlets and water inlets of the cooling water channel. The helical lines of the two groups of cooling water channels are two helical lines distributed axially and equidistantly. the

The utility model has the advantages that: different from the traditional cooling channels, the utility model has two sets of cooling channels, and the cooling effect is higher than that of the electric spindle with only one set of cooling channels, which can more effectively ensure the working temperature environment of the spindle; The convection method ensures that the temperature difference between different positions of the main shaft is not large, which better solves the problem of different overall temperature of the single cooling water channel main shaft, improves the static and dynamic characteristics of the main shaft, reduces the vibration amplitude of the main shaft during the rotation process, and improves the accuracy. ; The cooling water channel is spiral, which reduces the resistance of the coolant passing through the water channel, increases the heat dissipation area, and further improves the cooling effect. the

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described. the

Fig. 1 is a structural diagram of the utility model. the

Figure 2 is a schematic view of the appearance of the utility model. the

Fig. 3 is a schematic diagram of the water channel of the present invention. the

Detailed ways

The electric spindle includes a rotating shaft 6, a motor rotor 2, a motor stator 3, a shaft sleeve 4, a housing 8 and the like. The outside of the rotating shaft is provided with a motor rotor 2, and the outside of the motor rotor 2 is a motor stator 3, and the stator sleeve 4 is arranged between the stator 3 and the housing 8, and there are cooling channels 5 on the stator sleeve 4 and the front bearing seat 7. The cooling water channels 5 are respectively arranged between the shell 8 and the sleeve 4 and between the shell 8 and the front bearing seat 7. There are two sets of cooling water channels for convective cooling liquid, and the water channels are spirally arranged on the inner surface of the shell and the front bearing On the outer surface of the seat (as shown in Figure 3). The helical cooling water channel 5003 on the front bearing seat and the helical cooling water channel 5004 on the casing are both helical lines distributed axially and equidistantly. The front end of the electric spindle is provided with a water inlet 5001 of the first cooling water channel and a water outlet 5002 of the other cooling water channel. A water outlet 5005 and a water inlet 5006 corresponding to two groups of cooling channels are arranged at the rear end of the electric spindle. the

The connection line between the inlet and outlet of the cooling water channel at the front end of the electric spindle is perpendicular to the connection line between the inlet and outlet of the cooling water channel at the rear end. After the coolant is injected, the coolant in the two cooling water channels will convect, so as to quickly take away the heat of the spindle and ensure the normal working temperature of the spindle. Since the coolant is injected from both ends at the same time, the overall temperature of the spindle is guaranteed to be stable at the normal operating temperature with little difference, and the rotation accuracy of the spindle is improved. the

Claims (3)

1. A high-speed electric spindle with spiral double cooling channels, which is composed of a rotating shaft, a motor rotor, a motor stator, a shaft sleeve, and a housing. Between the stator and the housing, there are cooling water channels on the stator sleeve and the front bearing seat. The cooling water channel for the convective flow of the cooling liquid is arranged on the inner surface of the housing and the outer surface of the front bearing seat in a spiral shape. the 2. A high-speed electric spindle with spiral double cooling channels according to claim 1, characterized in that: the front end of the electric spindle is provided with a water inlet of a cooling water channel and a water outlet of another cooling water channel, and the rear end of the electric spindle is provided with two groups The water outlet and water inlet corresponding to the cooling channel. the 3. A high-speed electric spindle with helical double cooling channels according to claim 1, characterized in that: the helical lines of the two groups of cooling water channels are two helical lines distributed at equal distances in the axial direction. the

Images