CN213629352U - Novel high-speed rotary joint - Google Patents

Abstract

The utility model discloses a novel high-speed rotary joint, which comprises a rotating part and a fixing part, wherein the rotating part is fixedly connected with a main shaft of a machine tool and synchronously rotates, and the fixing part is fixedly connected with a high-pressure water pump; the rotating part comprises a rotating body, a sliding core and a first sealing element, the sliding core is arranged in the rotating body in a sliding mode, and the first sealing element is fixedly arranged at the end portion of the sliding core; the fixing piece comprises a fixed joint body, a filtering piece and a second sealing piece, the filtering piece is arranged at one end of the joint body close to the high-pressure water pump, and the second sealing piece is fixedly arranged at the other end of the fixed joint body; the first sealing element of the rotating part is in contact connection with the second sealing element of the fixing part when the machine tool spindle rotates. The utility model provides a pair of novel high-speed rotary joint has solved in the numerical control course of working, under the high rotational speed condition of lathe main shaft, the fracture problem and the not wear-resisting problem of sealing member that the sealing member caused by the inhomogeneous conduction of high temperature.

Description

Novel high-speed rotary joint

Technical Field

The utility model relates to the field of machining, concretely relates to novel high-speed rotary joint.

Background

With the continuous upgrading and improvement of modern technician technology, the cutter in the deep hole machining process needs better cooling to improve the service life of the cutter and the machining precision. Therefore, the cooling function of the water outlet of the cutter center is added by a plurality of processing equipment. The rotary joint dedicated to the machining center becomes a core part which must be provided. The rotary joint product produced at present in China has the following problems: the sealing element is not suitable for high-speed equipment and processing process conditions, and the sealing element deforms and leaks water under the high-temperature condition at high speed; the service life of the product can not meet the requirements of mass production and application, and water leakage is caused by abrasion of a sealing element after long-time use; the cooling liquid is not filtered, and once scrap iron particles enter a sealing surface, the sealing failure of parts is easily caused; in the prior art, an internal sealing element is usually made of graphite, so that the wear resistance and hardness are not enough, and the sealing material is brittle due to poor heat conduction effect; the traditional rotary joint is only suitable for low-speed machine tools below 6000 rpm.

Therefore, the problems of the prior art need to be solved.

Disclosure of Invention

The utility model aims at solving the problem in the background art and providing a novel high-speed rotary joint. The utility model provides a pair of novel high-speed rotary joint has solved in the numerical control course of working, and the fracture problem and the non-wear-resisting problem of sealing member that the sealing member caused by the inhomogeneous conduction of high temperature under the high rotational speed condition of machining center main shaft can be applicable to moreover and use on the lathe that the high rotational speed reaches 25000 changes/minute.

The above technical purpose of the present invention is achieved by the following technical solutions:

a novel high-speed rotary joint comprises a rotating part and a fixing part, wherein the rotating part is fixedly connected with a machine tool spindle and synchronously rotates, and the fixing part is fixedly connected with a high-pressure water pump;

the rotating part comprises a rotating body, a sliding core and a first sealing element, the sliding core is arranged in the rotating body in a sliding mode, and the first sealing element is fixedly arranged at the end portion of the sliding core;

the fixing piece comprises a fixed joint body, a filtering piece and a second sealing piece, the filtering piece is arranged at one end of the fixed joint body close to the high-pressure water pump, and the second sealing piece is fixedly arranged at the other end of the fixed joint body;

the first sealing element of the rotating part is in contact connection with the second sealing element of the fixing part when the machine tool spindle rotates.

According to the novel high-speed rotary joint, the rotating piece is fixedly connected to the tail end of the machine tool spindle through the fastening screw, and the central hole of the rotating piece is communicated with the central hole of the machine tool spindle.

According to the novel high-speed rotating joint, the fixing piece is in threaded connection with the joint at the liquid outlet end of the high-pressure water pump.

According to the novel high-speed rotating joint, the first sealing element is welded with the sliding core.

According to the novel high-speed rotating joint, the second sealing element is welded with the fixed joint body.

The novel high-speed rotating joint is characterized in that the rotating body is made of an anodized aluminum alloy material.

In a new high-speed rotary joint as described above, the first and second seals are made of a silicon carbide material.

According to the novel high-speed rotary joint, the rotating body is internally provided with the spring, and the spring is abutted to the sliding core.

According to the novel high-speed rotary joint, the first sealing ring is sleeved outside the rotating body.

According to the novel high-speed rotary joint, the second sealing ring is sleeved outside the fixed joint body.

Compared with the prior art, the utility model has the advantages of it is following and beneficial effect:

1. the utility model provides a pair of novel high-speed rotary joint has solved in the numerical control course of working, under the high rotational speed condition of lathe main shaft, the fracture problem and the not wear-resisting problem of sealing member that the sealing member caused by the inhomogeneous conduction of high temperature.

2. The utility model provides a pair of novel high-speed rotary joint has overcome traditional rotary joint accessory and has only been applicable to the not enough of low rotational speed lathe below 6000 commentaries on classics/minute, the utility model discloses a scheme is applicable to and uses on the lathe that high rotational speed reaches 25000 commentaries on classics/minute.

3. Lack the filtration to the coolant liquid among the prior art, the sealed face of iron fillings granule in case get into sealed, cause the part to seal inefficacy easily, filter setting up of piece and prevented that the iron fillings granule from entering into sealed face, further improvement sealed effect, also avoided first sealing member and second sealing member to receive the damage of iron fillings granule, improved the life of first sealing member and second sealing member.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art, and it is obvious that the following description is only one embodiment of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of a three-dimensional structure of a novel high-speed rotary joint provided by the present invention;

fig. 2 is a schematic view of a front structure of a novel high-speed rotary joint provided by the present invention;

FIG. 3 is a schematic view of the cross-sectional structure A-A of FIG. 2;

fig. 4 is a schematic structural view of the rotating member provided by the present invention;

fig. 5 is a schematic view of the fixing member structure provided by the present invention.

1-rotating part, 2-fixed part, 101-rotating body, 102-sliding core, 103-first sealing element, 104-first sealing ring, 105-fastening screw, 201-solid joint body, 202-filtering element, 203-second sealing element, 204-second sealing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained without creative work by the ordinary skilled person in the art all belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

Referring to fig. 1 to 5, a novel high-speed rotary joint includes a rotating member 1 and a fixing member 2, wherein the rotating member 1 is fixedly connected with a machine tool spindle and synchronously rotates, and the fixing member 2 is fixedly connected with a high-pressure water pump; the rotating part 1 comprises a rotating body 101, a sliding core 102 and a first sealing element 103, wherein the sliding core 102 is arranged inside the rotating body 101 in a sliding manner, and the first sealing element 103 is fixedly arranged at the end part of the sliding core 102; preferably, the rotating body 101 is made of an anodized aluminum alloy material, which can be prevented from being corroded; the fixing part 2 comprises a fixing joint body 201, a filter element 202 and a second sealing element 203, wherein the filter element 202 is arranged at one end of the fixing joint body 201 close to the high-pressure water pump, and the second sealing element 203 is fixedly arranged at the other end of the fixing joint body 201; preferably, the fixing piece 2 is made of 304 stainless steel materials, and is high-temperature resistant and high in toughness; the first sealing piece 103 of the rotating part 1 is in contact connection with the second sealing piece 203 of the fixed part 2 when the machine tool spindle rotates; the distance between the rotating part 1 and the fixing part 1 is 3mm-5mm when the rotating part and the fixing part are installed.

In the embodiment, the first sealing element 103 and the second sealing element 203 realize dynamic sealing, so that the defect that the traditional rotary joint fitting is only suitable for a low-rotation-speed machine tool with the rotation speed of below 6000 rpm is overcome, and the scheme of the embodiment can be suitable for being applied to a machine tool with the high rotation speed of 25000 rpm; lack the filtration to the coolant liquid among the prior art, the iron fillings granule is in case got into sealed face, cause the sealed inefficacy of part easily, filter setting up of piece 202 and prevented that coolant liquid impurities such as iron fillings granule from entering into sealed face, further improvement sealed effect, first sealing member 103 and second sealing member 203 have also been avoided receiving the damage of coolant liquid impurities such as iron fillings granule, the life of first sealing member 103 and second sealing member 203 has been improved, filter piece 202 adopts stainless steel powder suppression sintering shaping, the material is corrosion-resistant, non-deformable, and can change regularly.

Preferably, the rotating member 1 is fixedly connected to the end of the machine tool spindle through a fastening screw 105, and a central hole of the rotating member 1 is communicated with a central hole of the machine tool spindle.

Preferably, the fixing member 2 is in threaded connection with a joint at the liquid outlet end of the high-pressure water pump.

Preferably, the first seal 103 is welded to the sliding core 102.

Preferably, the second sealing member 203 is welded to the fixed joint body 201.

Preferably, the first seal 103 and the second seal 203 are made of a silicon carbide material. The silicon carbide material has the characteristics of corrosion resistance, high temperature resistance, high strength, good heat conducting property and impact resistance, and overcomes the problems of insufficient wear resistance and hardness of an internal sealing element and brittle fracture of the sealing material caused by poor heat conducting effect in the prior art, so that the traditional fragile graphite material with poor wear resistance is replaced.

Preferably, a spring (not shown) is further disposed inside the rotating body 101, and the spring (not shown) abuts against the sliding core 102.

Preferably, the rotating body 101 is externally sleeved with a first sealing ring 104.

Preferably, the fixed joint body 201 is externally sleeved with a second sealing ring 204.

When the machine tool receives an instruction of water outlet cooling processing, the high-pressure water pump flows cooling liquid to the inside of the rotating body 101 of the rotating part 1 which rotates at high speed through the filter part 202 of the fixing part 2 through a pipeline, negative pressure drives the sliding core 102 to move upwards to contact with the second sealing part 203 and rotate at high speed, and the first sealing part 103 contacts with the second sealing part 203 in the rotating process to realize dynamic sealing. The rotary member 1 rotates at a high speed and achieves water tightness during high-speed rotation of the contact seal while providing sufficient pressure for the cutter. When the machine tool receives a command for stopping the water discharge process, the high pressure water pump stops supplying water, the sliding core 202 is rebounded to the original position by the action of an internal spring (not shown in the figure), and the rotating member 1 is separated from the fixed member 2.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The novel high-speed rotating joint is characterized by comprising a rotating part (1) and a fixing part (2), wherein the rotating part (1) is fixedly connected with a main shaft of a machine tool and synchronously rotates, and the fixing part (2) is fixedly connected with a high-pressure water pump;

the rotating part (1) comprises a rotating body (101), a sliding core (102) and a first sealing element (103), wherein the sliding core (102) is arranged inside the rotating body (101) in a sliding mode, and the first sealing element (103) is fixedly arranged at the end part of the sliding core (102);

the fixing piece (2) comprises a fixing joint body (201), a filter piece (202) and a second sealing piece (203), the filter piece (202) is arranged at one end of the fixing joint body (201) close to the high-pressure water pump, and the second sealing piece (203) is fixedly arranged at the other end of the fixing joint body (201);

the first sealing element (103) of the rotating part (1) is in contact connection with the second sealing element (203) of the fixed part (2) when the machine tool spindle rotates.

2. A new high-speed rotary joint according to claim 1, characterized in that the rotating member (1) is fixedly connected to the end of the machine tool spindle by means of a fastening screw (105), and the central hole of the rotating member (1) is through-connected with the central hole of the machine tool spindle.

3. A new high speed swivel according to claim 1, characterized in that the fixture (2) is threaded with the connection at the outlet end of the high pressure water pump.

4. A new high speed swivel according to claim 1, characterized in that the first seal (103) is welded to the sliding core (102).

5. A new high speed swivel according to claim 1, characterized in that the second seal (203) is welded to the fixed joint body (201).

6. A new high speed swivel according to claim 1, characterized in that the rotating body (101) is made of anodized aluminium alloy material.

7. A new high speed rotary joint according to any one of claims 1 to 6, characterized in that the first seal (103) and the second seal (203) are made of silicon carbide material.

8. A new high-speed swivel according to any of claims 1-6, characterized in that inside the swivel body (101) there is also a spring, which abuts against the sliding core (102).

9. A new high-speed swivel according to any of claims 1-6, characterized in that the rotating body (101) is externally provided with a first sealing ring (104).

10. A new high-speed swivel according to any of claims 1-6, characterized in that the fixed joint body (201) is externally sleeved with a second sealing ring (204).

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