CN204487349U - High-power grinding machine spindle cooling body - Google Patents

Abstract

The utility model relates to a cooling mechanism for a main shaft of a high-power grinding machine, which comprises a machine body, an upper bearing seat, a lower bearing seat and a stator cooling sleeve; At the lower end of the body, the stator cooling jacket is embedded in the middle of the body; there is a first cooling channel between the outer surface of the upper bearing seat and the inner surface of the upper end of the body, and the second cooling passage between the outer surface of the lower bearing seat and the inner surface of the lower end of the body. There are three cooling passages, and there is a second cooling passage between the stator cooling jacket and the inner surface in the middle of the machine body. During operation, the cooling medium enters the input channel through the refrigerant inlet, then passes through the first cooling channel, the second cooling channel, the third cooling channel, and finally exits the body through the output channel. It solves the cooling problem of the previous high-power machine tool spindle, and at the same time provides a good sealing structure to make the performance of the cooling mechanism more stable. The utility model has concise structure and simple assembly, and is favorable for popularization.

Description

Spindle Cooling Mechanism for High Power Grinding Machine

technical field

The utility model relates to a stator cooling mechanism of a mechanical main shaft, in particular to a cooling mechanism for a main shaft of a high-power grinding machine.

Background technique

The high speed of high-power grinding machines has become an irresistible trend of development. The high-speed electric spindle unit is the key component to realize high-speed grinding. The high-speed electric spindle unit is a built-in motor, which cancels the intermediate transmission links such as gears and belts, and realizes "Zero transmission" of machine tools. However, the power loss heating of the built-in motor and the friction heating of the bearing cannot be ignored. In high-speed machining, the machining error caused by the thermal deformation of the electric spindle reaches 60% to 80% of the total machining error of the workpiece. Timely and effective cooling of high-speed electric spindles to reduce temperature rise and thermal deformation is especially important for high-speed machine tools. Overheating of electric spindles often damages parts and machining errors of workpieces and affects the service life of electric spindles.

Although many grinding machine spindles have cooling mechanisms, their cooling effect is still unsatisfactory. The main performance is that the positions of the cooling spindles, especially the bearings and stators, cannot be fully considered; Constraints such as wall thickness.

Utility model content

The utility model aims to overcome the above disadvantages and provide a cooling mechanism for the main shaft of a high-power grinding machine, which fully solves various problems unfavorable to machining caused by the overheating of the electric main shaft of a high-power grinding machine, and also solves the problems of the cooling area of similar products in the past. Technical problems of uniformity and unreasonable design.

The technical scheme of the utility model is realized in this way:

The cooling mechanism for the spindle of a high-power grinding machine includes a body, an upper bearing seat, a lower bearing seat, and a stator cooling jacket; the body is a cylindrical structure, the upper bearing seat is embedded in the upper end of the body, and the lower bearing seat is embedded in the lower end of the body. The stator cooling jacket is embedded in the middle of the body; there is a first cooling passage between the outer surface of the upper bearing seat and the inner surface of the upper end of the body, and a third cooling channel between the outer surface of the lower bearing seat and the inner surface of the lower end of the body. A cooling passage, a second cooling passage is provided between the stator cooling jacket and the inner surface in the middle of the machine body. The body has a refrigerant inlet, a refrigerant outlet, an input channel, and an output channel. The refrigerant inlet is connected to one end of the input channel, and the other end of the input channel is connected to the starting end of the first cooling channel. The terminal end of the first cooling channel is connected to the second end of the cooling channel. The starting end of the cooling channel is connected, the terminal end of the second cooling channel is connected with the starting end of the third cooling channel, the terminal end of the third cooling channel is connected with one end of the output flow channel, and the other end of the output flow channel is a refrigerant outlet.

The beneficial effect of such a design is that the arrangement of the cooling passages is simple and the stroke is reasonable, and the series connection of the three cooling passages takes into account the various parts required to be cooled by the main shaft of the high-power grinding machine.

Preferably, the first cooling passage is formed by a closed combination of the first cooling groove on the outer surface of the upper bearing seat and the upper inner surface of the machine body; the second cooling passage is a second cooling groove on the outer surface of the stator cooling jacket It is closed and combined with the inner surface of the middle of the body; the third cooling channel is formed by the closed combination of the third cooling groove on the outer surface of the lower bearing seat and the inner surface of the lower part of the body.

The benefit of such a design lies in the processing of the first cooling channel, the second cooling channel, and the third cooling channel, and then let them be respectively embedded in the inner side of the machine body. Obviously, this design has the beneficial effects of convenient processing and low cost.

Preferably, an O-ring seal is provided at the joint between both ends of the upper bearing seat and the upper inner surface of the body; an O-ring seal is provided at the joint between both ends of the lower bearing seat and the inner surface of the lower body; both ends of the stator cooling jacket An O-shaped sealing ring is arranged on the joint part with the inner wall of the body.

The benefit of such a design is to ensure a good sealing effect between the inner and outer sleeves and prevent the refrigerant from entering the main shaft.

Preferably, the first cooling channel is several annular channels of the upper bearing seat, and each annular channel of the upper bearing seat is connected by the first inner flow channel provided in the body; the third cooling channel is several The annular channel of the lower bearing seat, each annular channel of the lower bearing seat is communicated with the third inner flow channel provided in the body.

Preferably, the terminal end of the first cooling channel is connected to the starting end of the second cooling channel through a second inner flow channel arranged in the body, and the terminal end of the second cooling channel passes through a fourth inner flow channel arranged in the body Connect the start of the third cooling channel.

The advantage of such a design is that the first cooling channel, the second cooling channel, and the third cooling channel are connected in series more reasonably, which facilitates the transportation and transfer of refrigerant.

The refrigerant or cooling working medium may be water, oil, air, etc.

The beneficial effects of the utility model:

1. The parts are easy to process and easy to install, while ensuring good water cooling and sealing effects;

Second, it is especially suitable for high-power spindles, which can simultaneously cool the stator and all bearings well;

Three, effectively reduce the temperature of the stator and bearings, increase the service life of the bearings, reduce the internal temperature of the main shaft, improve the stability of the main shaft, and increase the life of the main shaft.

Fourth, the flow rate of the cooling liquid per unit time in the area where the electric spindle needs to be cooled is increased, the structure is compact, the appearance is beautiful, and the cooling effect is excellent.

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 that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 is a cross-sectional view of the location of the refrigerant inlet/outlet of the utility model;

Fig. 2 is a sectional view of the location of the inner runner of the utility model;

Reference signs: 1. Body, 11. First inner runner, 12. Second inner runner, 13. Third inner runner, 14. Fourth inner runner, 2. Upper bearing seat, 21. Refrigerant inlet , 22. Refrigerant outlet, 211. Input channel, 212. Output channel, 3. Lower bearing seat, 4. Stator cooling jacket, 6. O-ring, 7. Stator

Detailed ways

Below, in conjunction with accompanying drawing and specific embodiment, the utility model is described further:

As shown in Figure 1 and Figure 2, the main shaft cooling mechanism of a high-power grinding machine includes a body 1, an upper bearing seat 2, a lower bearing seat 3, and a stator cooling jacket 4; the body 1 is a cylindrical structure, and the upper bearing seat 2 is embedded in the upper end of the body 1, the lower bearing seat 3 is embedded in the lower end of the body 1, and the stator cooling jacket 4 is embedded in the middle of the body 1; A cooling passage, there is a third cooling passage between the outer surface of the lower bearing seat 3 and the inner surface of the lower end of the body 1, and a second cooling passage between the stator cooling jacket 4 and the inner surface in the middle of the body 1; The body 1 has a refrigerant inlet 21, a refrigerant outlet 22, an input channel 211, and an output channel 212. The refrigerant inlet 21 is connected to one end of the input channel 211, and the other end of the input channel 211 is connected to the beginning of the first cooling channel. The terminal end of the channel communicates with the initial end of the second cooling channel, the terminal end of the second cooling channel communicates with the initial end of the third cooling channel, the terminal end of the third cooling channel is connected with one end of the output channel 212, and the output channel The other end of 212 is refrigerant outlet 22 .

The working principle of the utility model: when in use, the coolant enters the input channel 211 through the refrigerant inlet 21, and then passes into the first cooling channel between the upper bearing seat 2 and the inner side of the upper end of the body 1. The bearing is cooled; then the refrigerant is transferred to the second cooling channel located in the stator cooling jacket 4 to cool the stator 7 of the electric spindle; The cooling channel cools the lower bearing; finally, the cooled coolant is discharged from the machine body 1 through the output flow channel 212 to complete the cooling of the entire main shaft of the high-power grinding machine.

Preferably, the first cooling passage is formed by sealing and combining the first cooling groove on the outer surface of the upper bearing seat 2 with the upper inner surface of the body 1; the second cooling passage is the first cooling groove on the outer surface of the stator cooling jacket 4. The second cooling groove is closed and combined with the middle inner surface of the body 1; the third cooling channel is formed by the closed combination of the third cooling groove on the outer surface of the lower bearing seat 3 and the lower inner surface of the body 1.

Since the first cooling passage, the second cooling passage, and the third cooling passage are all arranged inside the body 1, the outer surface of the upper bearing seat 2, the outer surface of the lower bearing seat 3, and the outer surface of the stator cooling jacket 4 are slotted, Then let the upper bearing seat 2, the lower bearing seat 3, and the stator cooling jacket 4 be embedded in the inner surface of the body 1 respectively. Obviously, this design is simpler to process and lower in cost.

Preferably, an O-ring seal 6 is provided at the junction between both ends of the upper bearing seat 2 and the upper inner side of the body 1; an O-ring 6 is arranged at the junction of both ends of the lower bearing seat 3 and the lower inner side of the body 1; An O-ring seal 6 is provided at the junction between the two ends of the stator cooling jacket 4 and the inner wall of the machine body 1 .

The reason is that the sealing ring is set at the above key position, which prevents the leakage of the refrigerant, ensures a good sealing effect between the inner and outer sets, and improves the stability of the electric spindle during use.

Preferably, the first cooling passage is several annular passages of the upper bearing seat 2, and each annular passage of the upper bearing seat 2 is communicated with the first inner flow passage 11 arranged in the body 1; the third cooling passage The channel is a plurality of lower bearing seats 3 annular channels, and each lower bearing seat 3 annular channel is connected by the third inner flow channel 13 arranged in the body 1 .

Preferably, the terminal end of the first cooling channel is connected to the starting end of the second cooling channel through the second inner flow channel 12 arranged in the body 1, and the terminal end of the second cooling channel is connected to the starting end of the second cooling channel through the fourth inner flow channel 12 arranged in the body 1. The inner flow channel 14 is connected to the starting end of the third cooling channel.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and ideas described above, and all these changes and deformations should fall within the protection scope of the claims of the present utility model.

Claims (5)

1. The cooling mechanism for the main shaft of a high-power grinding machine, including the body, the upper bearing seat, the lower bearing seat, and the stator cooling sleeve, is characterized in that: the body is a cylindrical structure, the upper bearing seat is embedded in the upper end of the machine body, and the lower bearing seat Embedded in the lower end of the body, the stator cooling jacket is embedded in the middle of the body; there is a first cooling channel between the outer surface of the upper bearing seat and the inner surface of the upper end of the body, and the outer surface of the lower bearing seat and the inner surface of the lower end of the body There is a third cooling channel between the sides, and a second cooling channel between the stator cooling jacket and the inner surface in the middle of the body. The body has a refrigerant inlet, a refrigerant outlet, an input flow channel, and an output flow channel. The refrigerant inlet is connected One end of the input flow channel, the other end of the input flow channel is connected to the start end of the first cooling channel, the end end of the first cooling channel is connected to the start end of the second cooling channel, and the end end of the second cooling channel is connected to the start end of the third cooling channel The terminal end of the third cooling channel is connected to one end of the output flow channel, and the other end of the output flow channel is the refrigerant outlet. 2. The cooling mechanism for the spindle of a high-power grinding machine according to claim 1, wherein the first cooling passage is formed by sealing and combining the first cooling groove on the outer surface of the upper bearing seat and the inner surface of the upper part of the machine body; The second cooling passage is formed by the closed combination of the second cooling groove on the outer surface of the stator cooling jacket and the middle inner surface of the body; the third cooling passage is formed by the third cooling groove on the outer surface of the lower bearing seat and the inner surface of the lower part of the body A closed bond is formed. 3. The cooling mechanism for the main shaft of a high-power grinding machine according to claim 1, characterized in that: O-shaped sealing rings are provided at the joint between the two ends of the upper bearing seat and the inner surface of the upper part of the machine body; An O-ring seal is provided on the side joint part; an O-ring seal is provided on the joint part between both ends of the stator cooling jacket and the inner wall of the machine body. 4. The cooling mechanism for the main shaft of a high-power grinding machine according to claim 1, characterized in that: the first cooling channel is a plurality of upper bearing seat annular channels, and each upper bearing seat annular channel is arranged in the machine body The first inner flow channel is connected; the third cooling channel is a plurality of lower bearing seat annular channels, and each lower bearing seat annular channel is connected by the third inner flow channel arranged in the body. 5. The cooling mechanism for the spindle of a high-power grinding machine according to claim 1, characterized in that: the terminal end of the first cooling channel is connected to the starting end of the second cooling channel through the second inner flow channel arranged in the machine body, and the second The terminal end of the second cooling channel is connected to the starting end of the third cooling channel through the fourth internal flow channel arranged in the body.