High-speed heavy-load magnetofluid sealing device

Abstract

The utility model relates to the technical field of high-speed heavy-load magnetic fluid sealing devices, and discloses a high-speed heavy-load magnetic fluid sealing device, which comprises a rotating shaft and a magnetic fluid sealing device sleeved outside the rotating shaft, the rotating shaft rotates in the magnetofluid sealing device under the action of a bearing embedded in the magnetofluid sealing device and is sealed through magnetofluid and a magnetic pole component arranged in the magnetofluid sealing device, a blind hole is formed in the tail end of the rotating shaft, and a tailstock is fixedly arranged at the tail end of the magnetofluid sealing device through a bolt. According to the utility model, cold air is supplied into the cold air supply pipe, so that the cold air circulates in the spiral air channel, the cold air is fully contacted with the heat exchange transfer pipe to realize heat exchange, and the heat exchange transfer pipe is fully contacted with and exchanges heat with the rotating shaft through filled silicone grease; heat generated by friction between the rotating shaft and the bearing is rapidly taken away, the temperature of the magnetic fluid sealing device is controlled, and compared with a cooling part arranged in the magnetic fluid sealing device, the cooling part is arranged.

Description

Technical Field

[0001] The utility model relates to the technical field of high-speed and heavy-load magnetic fluid sealing devices, in particular to a high-speed and heavy-load magnetic fluid sealing device. Background Art

[0002] Under high speed and heavy load conditions, the bearing area will heat up quickly, which will cause thermal expansion and further increase friction, resulting in rapid heat rise, which will cause the magnetic body in the magnetic fluid sealing device to demagnetize and affect the sealing effect. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to overcome the above problems, a high-speed and heavy-load magnetic fluid sealing device is provided, which solves the above problems.

[0004] The utility model solves the technical problem by adopting the following technical solutions:

[0005] A high-speed, heavy-loaded magnetic fluid sealing device comprises a rotating shaft and a magnetic fluid sealing device sleeved on the outside of the rotating shaft. The rotating shaft rotates in the magnetic fluid sealing device under the action of a bearing embedded in the magnetic fluid sealing device and is sealed by setting the magnetic fluid and magnetic pole components in the magnetic fluid sealing device. A blind hole is provided at the tail end of the rotating shaft, and a tail frame is fixedly provided at the tail end of the magnetic fluid sealing device by bolts. A cold air supply pipe inserted into the rotating shaft is fixedly provided on the tail frame. The tail end of the cold air supply pipe is connected to an air supply hose. The air supply hose inputs an external cold air source into the rotating shaft through the cold air supply pipe for heat dissipation.

[0006] Preferably, a threaded stepped hole is provided in the rotating shaft, and a heat exchange transfer tube with a sealing thread head is provided in the internal thread connection of the rotating shaft, and a gap cavity is provided between the heat exchange transfer tube and the inner hole wall of the rotating shaft.

[0007] Preferably, the gap cavity is filled with silicone grease for transferring heat.

[0008] Preferably, an end stabilizing plug is fixedly provided at the front end of the heat exchange transfer tube for being inserted into the rotating shaft, so that the assembly of the heat exchange transfer tube is more stable.

[0009] Preferably, a middle tube is provided inside the heat exchange transfer tube, and a spiral air guide plate is provided between the middle tube and the heat exchange transfer tube, and the spiral air guide plate divides the cavity inside the heat exchange transfer tube into a continuous spiral air channel.

[0010] Preferably, the cold air supply pipe is inserted into the central pipe, and an exhaust expansion head is threadedly connected to the front end of the cold air supply pipe.

[0011] The advantages and positive effects of the utility model are as follows: by supplying cold air into the cold air supply pipe so that it circulates in the spiral airway, it fully contacts the heat exchange transfer pipe to achieve heat exchange, and the heat exchange transfer pipe is fully contacted and heat-exchanged with the rotating shaft through the filled silicone grease, and the heat generated by the friction between the rotating shaft and the bearing is quickly taken away to control the temperature of the magnetic fluid sealing device. Compared with setting a cooling component inside the magnetic fluid sealing device, this structure is simpler and more convenient, simpler to maintain, low in cost, and high in heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic structural diagram of the heat exchange transfer tube 11 in the utility model;

[0015] Figure 3 yes Figure 2 BB-section structural schematic diagram;

[0016] Figure 4 It is a schematic structural diagram of the heat exchange transfer tube 11 installed in the rotating shaft 10 in the utility model. DETAILED DESCRIPTION

[0017] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0018] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0019] like Figure 1-4 As shown, a high-speed and heavy-load magnetic fluid sealing device described in the utility model includes a rotating shaft 10 and a magnetic fluid sealing device 13 sleeved on the outside of the rotating shaft 10, the rotating shaft 10 rotates in the magnetic fluid sealing device 13 under the action of a bearing embedded in the magnetic fluid sealing device 13 and is sealed by setting the magnetic fluid and magnetic pole components in the magnetic fluid sealing device 13, a blind hole is provided at the tail end of the rotating shaft 10, and a tail frame 14 is fixedly provided at the tail end of the magnetic fluid sealing device 13 by bolts, a cold air supply pipe 16 inserted into the rotating shaft 10 is fixedly provided on the tail frame 14, the tail end of the cold air supply pipe 16 is connected to an air supply hose 15, and the air supply hose 15 inputs an external cold air source into the rotating shaft 10 through the cold air supply pipe 16 for heat dissipation.

[0020] Preferably, a threaded stepped hole is provided in the rotating shaft 10 , and a heat exchange transfer tube 11 with a sealing thread head 21 is threadedly connected to the internal thread of the rotating shaft 10 , and a gap cavity 12 is provided between the heat exchange transfer tube 11 and the inner hole wall of the rotating shaft 10 .

[0021] Preferably, the gap cavity 12 is filled with silicone grease for transferring heat.

[0022] Preferably, an end stabilizing plug 20 is fixedly provided at the front end of the heat exchange transfer tube 11 for being inserted into the rotating shaft 10 , so that the assembly of the heat exchange transfer tube 11 is more stable.

[0023] Preferably, a middle tube 22 is provided inside the heat exchange transfer tube 11 , and a spiral air guide sheet 17 is provided between the middle tube 22 and the heat exchange transfer tube 11 , and the spiral air guide sheet 17 divides the cavity inside the heat exchange transfer tube 11 into a continuous spiral air channel 18 .

[0024] Preferably, the cold air supply pipe 16 is inserted into the central pipe 22 , and an exhaust expansion head 19 is threadedly connected to the front end of the cold air supply pipe 16 .

[0025] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention is not limited to the embodiments described in the specific implementation manner. Any other implementation manners derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims

1. A high-speed and heavy-load magnetic fluid sealing device, comprising a rotating shaft (10) and a magnetic fluid sealing device (13) sleeved on the outside of the rotating shaft (10), wherein the rotating shaft (10) rotates in the magnetic fluid sealing device (13) under the action of a bearing embedded in the magnetic fluid sealing device (13) and is sealed by the magnetic fluid and magnetic pole components arranged in the magnetic fluid sealing device (13), characterized in that: A blind hole is provided at the rear end of the rotating shaft (10), and a tail frame (14) is fixedly provided at the rear end of the magnetic fluid sealing device (13) by means of bolts, and a cold air supply pipe (16) inserted into the rotating shaft (10) is fixedly provided on the tail frame (14), and the rear end of the cold air supply pipe (16) is connected to an air supply hose (15), and the air supply hose (15) inputs an external cold air source into the rotating shaft (10) through the cold air supply pipe (16) for heat dissipation.

2. A high-speed and heavy-load magnetic fluid sealing device according to claim 1, characterized in that: A threaded stepped hole is provided in the rotating shaft (10), and a heat exchange transfer pipe (11) with a sealing thread head (21) is provided in the rotating shaft (10) through internal thread connection, and a gap cavity (12) is provided between the heat exchange transfer pipe (11) and the inner hole wall of the rotating shaft (10).

3. A high-speed and heavy-load magnetic fluid sealing device according to claim 2, characterized in that: The gap cavity (12) is filled with silicone grease for transferring heat.

4. A high-speed and heavy-load magnetic fluid sealing device according to claim 3, characterized in that: An end stabilizing plug (20) is fixedly provided at the front end of the heat exchange transfer tube (11) for being inserted into the rotating shaft (10), so that the assembly of the heat exchange transfer tube (11) is more stable.

5. A high-speed and heavy-load magnetic fluid sealing device according to claim 4, characterized in that: A central tube (22) is provided inside the heat exchange transfer tube (11), and a spiral air guide sheet (17) is provided between the central tube (22) and the heat exchange transfer tube (11), wherein the spiral air guide sheet (17) divides the cavity inside the heat exchange transfer tube (11) into a continuous spiral air channel (18).

6. A high-speed and heavy-load magnetic fluid sealing device according to claim 5, characterized in that: The cold air supply pipe (16) is inserted into the middle pipe (22), and an exhaust expansion head (19) is threadedly connected to the front end of the cold air supply pipe (16).

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