A central air intake device for hollow shaft reducer

Abstract

The present invention discloses a central air intake device applied to a hollow shaft reducer, comprising a balance tank, a rotary joint, an expansion joint, an air intake pipe, an air intake pipe support frame, and a fixed frame. The rotary joint is provided with a sealing liquid cavity, the rotary joint is installed in the hollow shaft reducer, the upper end of the rotary joint is connected with one end of the air intake pipe, the other end of the air intake pipe is provided with the expansion joint, the expansion joint is connected with another air intake pipe, one end of the air intake pipe support frame supports and fixes the air intake pipe, the balance tank is supported by the fixed frame, the installation height is higher than the rotary joint, and the liquid inlet pipe and the liquid outlet pipe in the balance tank are respectively connected with the rotary joint. The device can avoid the situation that the rotary joint is damaged due to working vibration, and can also avoid dry friction between the dynamic and static rings of the rotary joint and gas leakage.

Description

Technical Field

[0001] The invention belongs to the technical field of air intake in a stirring device, and in particular relates to a central air intake device applied to a hollow shaft reducer. Background Art

[0002] The air intake pipe of the existing central air intake device used in the hollow shaft reducer is directly connected to the rotary joint, which is a hard connection. The air intake end of the rotary joint bears the additional eccentric load generated by the air intake pipe, and the force is uneven, which will cause the dynamic and static ring sealing surfaces inside the rotary joint to wear faster, and the rotary joint will be damaged due to working vibration. In addition, the rotary joint equipped with the existing central air intake device is dry friction, the dynamic and static rings have a short service life and are prone to air leakage. Summary of the invention

[0003] In view of this, an embodiment of the present invention hopes to provide a central air intake device applied to a hollow shaft reducer, which can avoid damage to the rotary joint due to working vibration, and can also avoid dry friction between the dynamic and static rings of the rotary joint and gas leakage.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] The present invention provides a central air intake device applied to a hollow shaft reducer, comprising a balancing tank, a rotary joint, an expansion joint, an air intake pipe, an air intake pipe support frame, and a fixed frame. A liquid sealing chamber is provided in the rotary joint, and the rotary joint is installed in the hollow shaft reducer. The upper end of the rotary joint is connected to one end of the air intake pipe, and the other end of the air intake pipe is provided with the expansion joint, and the expansion joint is connected to one of the air intake pipes. One end of the air intake pipe support frame supports and fixes the air intake pipe. The balancing tank is supported by the fixed frame, and the installation height is higher than the rotary joint. The liquid inlet pipe and the liquid outlet pipe in the balancing tank are respectively connected to the rotary joint.

[0006] Furthermore, a sealing gasket is provided between the rotary joint and the transmission shaft, and the sealing gasket is a flat gasket or an O-ring.

[0007] Furthermore, the expansion joint is a rubber expansion joint or a metal hose.

[0008] Furthermore, the balance tank is a normal pressure tank or a pressure tank.

[0009] Furthermore, the air intake pipe support frame and the fixing frame are channel steel frames and angle steel frames.

[0010] Furthermore, the air intake pipe support frame and the fixing frame are plate-welded frames.

[0011] The beneficial effects of the present invention are as follows: the device of the present invention can avoid the situation where the rotary joint is damaged due to working vibration, and can also avoid dry friction between the dynamic and static rings of the rotary joint and gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic structural diagram of a central air intake device applied to a hollow shaft reducer according to an embodiment of the present invention;

[0013] Figure 2 This is a schematic diagram of a rotary joint with a sealed liquid cavity used in a central air intake device of a hollow shaft reducer according to an embodiment of the present invention;

[0014] Among them, 1 is a reducer, 2 is a balance tank, 3 is a rotary joint, 31 is a sealing liquid chamber, 4 is an expansion joint, 5 is an air intake pipe, 6 is an air intake pipe support frame, 7 is a fixed frame, 8 is a hollow transmission shaft, 9 is a sealing gasket, 10 is a liquid inlet pipe, and 11 is a liquid outlet pipe. DETAILED DESCRIPTION

[0015] In order to more thoroughly understand the features and technical contents of the present invention, the implementation of the present invention is described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and explanation, and are not used to limit the present invention.

[0016] Figure 1 This is a schematic structural diagram of a central air intake device applied to a hollow shaft reducer according to an embodiment of the present invention. Figure 2 Schematic diagram of a rotary joint with a sealed liquid cavity in a central air intake device of a hollow shaft reducer according to an embodiment of the present invention, Figure 1 , Figure 2 As shown, it includes a balancing tank 2, a rotary joint 3, an expansion joint 4, an air intake pipe 5, an air intake pipe support frame 6, and a fixed frame 7. The rotary joint 3 is provided with a liquid sealing cavity 31, and the rotary joint 3 is installed in the hollow shaft reducer 1. The upper end of the rotary joint 3 is connected to one end of the air intake pipe 5, and the other end of the air intake pipe 5 is provided with the expansion joint 4, and the expansion joint 4 is connected to another air intake pipe 5. One end of the air intake pipe support frame 6 supports and fixes the air intake pipe 5. The balancing tank 2 is supported by the fixed frame 7, and the installation height is higher than the rotary joint 3. The liquid inlet pipe 10 and the liquid outlet pipe 11 in the balancing tank 2 are respectively connected to the rotary joint 3.

[0017] Here, the rotary joint 3 can be installed in the hollow transmission shaft 8 structure in the hollow shaft reducer; or it can be directly installed in the hollow shaft reducer 1 without the hollow transmission shaft structure.

[0018] Here, the other ends of the intake pipe support frame 6 and the fixing frame 7 are fixed on the hollow shaft reducer 1 or other fixing support points.

[0019] Furthermore, a sealing gasket 9 is provided between the rotary joint 3 and the transmission shaft 8 , and the sealing gasket 9 is a flat gasket or an O-ring.

[0020] Preferably, the expansion joint 4 is a rubber expansion joint or a metal hose.

[0021] Preferably, the balance tank 2 is a normal pressure tank or a pressure tank.

[0022] Preferably, the air intake pipe support frame 6 and the fixing frame 7 are channel steel frames and angle steel frames.

[0023] Furthermore, the air intake pipe support frame 6 and the fixing frame 7 are plate-welded frames.

[0024] Here, setting up an expansion joint structure can avoid the situation where the rotary joint is damaged due to working vibration; a sealing liquid chamber and a matching balancing tank are provided in the rotary joint, and the balancing tank is connected to the rotary joint through a liquid inlet pipe and a liquid outlet pipe. Sealing liquid can be added to the balancing tank to wet lubricate the friction surfaces of the dynamic and static rings inside the rotary joint; a certain pressure can be provided by a manual booster pump or an external air source so that the pressure in the balancing tank and the sealing liquid chamber is higher than the pressure in the pipeline, which can effectively avoid dry friction between the dynamic and static rings of the rotary joint and gas leakage; in addition, a liquid level alarm or a pressure alarm can be set in the balancing tank, and an alarm can be given in time when there is a leakage of the sealing liquid.

[0025] The specific models of the above-mentioned devices are not limited or described in detail, and the in-depth connection methods of the above-mentioned devices are not described in detail. As common knowledge, technicians in this field can understand it.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A central air intake device for a hollow shaft reducer, characterized in that: It includes a balancing tank, a rotating joint, an expansion joint, an air intake pipe, an air intake pipe support frame, and a fixed frame. The rotating joint is provided with a liquid sealing chamber, the rotating joint is installed in the hollow shaft reducer, the upper end of the rotating joint is connected with one end of the air intake pipe, the other end of the air intake pipe is provided with the expansion joint, and the expansion joint is connected to one of the air intake pipes. One end of the air intake pipe support frame supports and fixes the air intake pipe. The balancing tank is supported by the fixed frame, and the installation height is higher than the rotating joint. The liquid inlet pipe and the liquid outlet pipe in the balancing tank are respectively connected to the rotating joint.

2. The central air intake device for a hollow shaft reducer according to claim 1, characterized in that: A sealing gasket is provided between the rotary joint and the transmission shaft, and the sealing gasket is a flat gasket or an O-ring.

3. The central air intake device for a hollow shaft reducer according to claim 1, characterized in that: The expansion joint is a rubber expansion joint or a metal hose.

4. The central air intake device for a hollow shaft reducer according to claim 1, characterized in that: The balance tank is a normal pressure tank or a pressure tank.

5. The central air intake device for a hollow shaft reducer according to claim 1, characterized in that: The air intake pipe support frame and the fixing frame are channel steel frames and angle steel frames.

6. The central air intake device for a hollow shaft reducer according to claim 1, characterized in that: The air intake pipe support frame and the fixing frame are plate-welded frames.

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