Sealing unit for hydraulic slip ring

Abstract

The invention provides a sealing unit for a hydraulic slip ring, and relates to the technical field of conductive slip rings, the sealing unit comprises a rotor and a stator assembly, the stator assembly is used for enhancing the sealing performance of the hydraulic slip ring, a lower protective shell is installed on the rotor, an upper protective shell is connected with the lower protective shell through a connecting piece, and the upper protective shell is connected with the lower protective shell through the connecting piece. The inner ring protrusion is fixedly connected with the rotor, the inner ring protrusion is embedded into the groove of the lower protective shell, the periphery of the inner ring protrusion is connected with the inner groove of the upper protective shell in an inserted mode, the inner ring protrusion is arranged on the rotor, and grooves matched with the inner ring protrusion are machined in the lower protective shell and the upper protective shell. And the lubricating grease smeared between the grooves reduces abrasion of the stator assembly and the rotor, the service life of the unit is prolonged, in addition, the O-shaped ring made of rubber is high in plasticity, and sealing of the hydraulic slip ring in different working states can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of conductive slip rings, and in particular to a sealing unit for a hydraulic slip ring. Background Art

[0002] The hydraulic slip ring is a self-balancing element for fluid transmission. It is usually used to transport hydraulic media to the hydraulic actuator above the rotating equipment. When working, its piston rod moves left and right to achieve radial loosening and clamping of the chuck. Because the hydraulic slip ring needs to transport liquid media, it has high requirements for the seals at the valve. If the seal is not good, it will cause internal leakage in the system and reduce the life of the slip ring. Therefore, the sealing of the hydraulic slip ring is particularly important. In order to avoid this situation, the existing technology has the following solutions: For example, a hydraulic slip ring disclosed in publication number CN217207115U achieves sealing of the end face of the slip ring by welding a fixed disc on the end face of the slip ring.

[0003] For example, a hydraulic slip ring leakage status monitoring system proposed in publication number CN217004080U can detect and warn of ring leakage, thereby minimizing losses.

[0004] For example, the circular arc groove end face oil film seal hydraulic slip ring proposed in publication number CN101598217A utilizes the circular arc deep groove end face oil film seal to achieve non-contact oil film seal, reduce friction and extend service life.

[0005] However, the above method starts from the end face and cannot solve the problem of internal leakage of the slip ring, and the detection system can only detect faults but cannot prevent them. Therefore, the existing structural deficiencies are studied and improved, and a sealing unit for a hydraulic slip ring is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a sealing unit for a hydraulic slip ring, which solves the problem of hydraulic slip ring sealing by clamping the inner ring protrusion on the rotor with the grooves in the upper and lower protective shells.

[0007] The present invention provides a sealing unit for a hydraulic slip ring, comprising: Rotor; A stator assembly, the stator assembly is used to enhance the sealing performance of the hydraulic slip ring; The stator assembly comprises a lower protective shell, an upper protective shell, an inner ring protrusion and a connecting piece; The lower protective shell is installed on the rotor, the upper protective shell is connected to the lower protective shell through the connecting piece, the inner ring protrusion is fixedly connected to the rotor, the inner ring protrusion is embedded in the groove of the lower protective shell, the outer periphery of the inner ring protrusion is plug-connected with the internal groove of the upper protective shell, and the inner ring protrusion is embedded in the grooves of the lower protective shell and the upper protective shell, thereby enhancing the sealing performance of the rotor with the lower protective shell and the upper protective shell.

[0008] Preferably, an oil inlet is provided on the upper protective shell, and the oil inlet is used to apply grease to the groove formed by the lower protective shell and the upper protective shell; The oil inlet member comprises an oil inlet and a sealing plug; The oil inlet is opened at the top of the upper protective shell, and the sealing plug is used to control the opening and closing of the oil inlet.

[0009] Preferably, a limit pin is processed on the upper protective shell, and the limit pin is used to guide the installation position of the lower protective shell and the upper protective shell.

[0010] Preferably, a limiting groove adapted to the limiting pin is processed in the lower protective shell.

[0011] Preferably, a sealing assembly is installed on the rotor, and the sealing assembly is used to enhance the sealing effect between the rotor and the lower protective shell and the upper protective shell; The sealing assembly includes an O-ring, a retaining ring, a collar and a positioning pin; The O-ring is sleeved on the rotor, and the O-ring is arranged between the rotor and the lower protective shell and the upper protective shell. A retaining ring is arranged on one side of the O-ring, and the retaining ring is fixedly connected to the rotor. A sleeve ring is arranged on the other side of the O-ring, and the sleeve ring is connected to the rotor through the positioning pin.

[0012] Preferably, the positioning pins are evenly distributed along the collar.

[0013] The present invention provides a sealing unit for a hydraulic sliding ring through improvement, which has the following improvements and advantages compared with the prior art: Through the coordinated use of the rotor, lower protective shell, upper protective shell, inner ring protrusion, connecting parts, etc., the inner ring protrusion is arranged on the rotor, and grooves matching the inner ring protrusion are processed in the lower protective shell and the upper protective shell. The grease applied between the grooves reduces the wear of the stator assembly and the rotor, and improves the service life of the unit. In addition, the rubber O-ring has strong plasticity and can realize the sealing of hydraulic slip rings in different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention.

[0015] Figure 2 It is a schematic structural diagram of the rotor, upper protective shell and lower protective shell of the present invention.

[0016] Figure 3 It is a schematic structural diagram of the upper protective shell, the lower protective shell and the inner ring protrusion of the present invention.

[0017] Figure 4 It is a schematic structural diagram of the retaining ring, O-ring and sleeve ring of the present invention.

[0018] Description of reference numerals: 1-rotor, 2-stator assembly, 21-lower protective shell, 22-upper protective shell, 221-limit pin, 222-oil inlet, 222a-oil inlet, 222b-sealing plug, 23-inner ring protrusion, 24-connecting piece, 3-sealing assembly, 31-O-ring, 32-retaining ring, 33-sleeve ring, 34-locating pin. DETAILED DESCRIPTION

[0019] In this embodiment, if Figure 1 and Figure 3 As shown, a sealing unit for a hydraulic slip ring includes a rotor 1 and a stator assembly 2. The stator assembly 2 is used to enhance the sealing performance of the hydraulic slip ring. The stator assembly 2 includes a lower protective shell 21, an upper protective shell 22, an inner ring protrusion 23 and a connector 24. The lower protective shell 21 is installed on the rotor 1. The upper protective shell 22 is connected to the lower protective shell 21 through the connector 24. The inner ring protrusion 23 is fixedly connected to the rotor 1. The inner ring protrusion 23 is embedded in the groove of the lower protective shell 21. The outer periphery of the inner ring protrusion 23 is plugged and connected to the inner groove of the upper protective shell 22. The inner ring protrusion 23 is embedded in the grooves of the lower protective shell 21 and the upper protective shell 22, thereby enhancing the sealing performance of the rotor 1 with the lower protective shell 21 and the upper protective shell 22.

[0020] Furthermore, grooves matching the inner ring protrusion 23 are machined in the lower protective shell 21 and the upper protective shell 22. The arrangement of four connecting parts 24 increases the connection strength between the lower protective shell 21 and the upper protective shell 22. The grooves and the inner ring protrusion 23 in the lower protective shell 21 and the upper protective shell 22 can cooperate and clamp with each other when the slip ring is working.

[0021] In some embodiments, Figure 1 and Figure 2 As shown, an oil inlet 222 is provided on the upper protective shell 22, and the oil inlet 222 is used to apply grease to the groove formed by the lower protective shell 21 and the upper protective shell 22. The oil inlet 222 includes an oil inlet 222a and a sealing plug 222b. The oil inlet 222a is opened at the top of the upper protective shell 22, and the sealing plug 222b is used to control the opening and closing of the oil inlet 222a.

[0022] Furthermore, sealing plugs 222b are provided in the two oil inlets 222a. The sealing plugs 222b are opened to apply grease between the grooves of the upper protective shell 22 and the lower protective shell 21 through the oil inlet 222a, thereby enhancing the sealing effect and reducing the wear of the stator assembly 2 and the rotor 1.

[0023] In some embodiments, Figure 3 As shown, a limit pin 221 is processed on the upper protective shell 22, and the limit pin 221 is used to guide the installation position of the lower protective shell 21 and the upper protective shell 22.

[0024] Furthermore, two limit pins 221 are provided, and the limit pins 221 are inserted into the limit grooves in the lower protective shell 21 to increase the connection strength between the lower protective shell 21 and the upper protective shell 22.

[0025] In some embodiments, Figure 1 and Figure 3 As shown, a limiting groove matched with the limiting pin 221 is processed in the lower protective shell 21.

[0026] Furthermore, a groove matching the inner ring protrusion 23 is formed in the lower protective shell 21 .

[0027] In some embodiments, Figure 4 As shown, a sealing assembly 3 is installed on the rotor 1, and the sealing assembly 3 is used to enhance the sealing effect between the rotor 1 and the lower protective shell 21 and the upper protective shell 22. The sealing assembly 3 includes an O-ring 31, a retaining ring 32, a sleeve ring 33 and a positioning pin 34. The O-ring 31 is sleeved on the rotor 1, and the O-ring 31 is arranged between the rotor 1 and the lower protective shell 21 and the upper protective shell 22. A retaining ring 32 is arranged on one side of the O-ring 31, and the retaining ring 32 is fixedly connected to the rotor 1. A sleeve ring 33 is arranged on the other side of the O-ring 31, and the sleeve ring 33 is connected to the rotor 1 through the positioning pin 34.

[0028] Furthermore, two O-rings 31 are provided. The O-rings 31 are made of rubber and can produce different deformations in different working states of the slip ring to achieve a similar sealing effect. The height of the O-ring 31 is slightly higher than the inner ring protrusion 23, so that the O-ring 31 fits tightly between the stator assembly 2 and the rotor 1. The O-ring 31 is installed between the retaining ring 32 and the sleeve ring 33.

[0029] In some embodiments, Figure 1 and Figure 4 As shown, the positioning pins 34 are evenly distributed along the collar 33 .

[0030] Furthermore, the provision of four positioning pins 34 increases the connection strength between the collar 33 and the rotor 1 .

[0031] Working principle: First, fix two inner ring protrusions 23 on the rotor 1, then buckle the upper shell 22 and the lower shell 21 on the outer wall of the inner ring protrusion 23, and the inner ring protrusion 23 is embedded in the grooves of the upper shell 22 and the lower shell 21. At the same time, the limit pin 221 on the upper shell 22 is inserted into the limit groove of the lower shell 22, and then the upper shell 22 and the lower shell 21 are connected together using the connecting piece 24, and the sealing plug 222b on the oil inlet 222a is opened, and the oil is pumped through the oil inlet 2 22a applies grease between the grooves of the upper protective shell 22 and the lower protective shell 21, insert the O-ring 31 into the two ends of the rotor 1, move the O-ring 31 and the retaining ring 32 to fit together, and then insert the ring 33 into the rotor 1. At this time, the O-ring 31 is placed between the retaining ring 32 and the ring 33, and the positioning pin 34 is used to fix the use position of the ring 33. The O-ring 31 is made of rubber and can produce different deformations in different working states of the slip ring to achieve a similar sealing effect.

Claims

1. A sealing unit for a hydraulic slip ring, characterized in that: include: Rotor (1); A stator assembly (2), wherein the stator assembly (2) is used to enhance the sealing performance of a hydraulic slip ring; The stator assembly (2) comprises a lower protective shell (21), an upper protective shell (22), an inner ring protrusion (23) and a connecting piece (24); The lower protective shell (21) is mounted on the rotor (1); the upper protective shell (22) is connected to the lower protective shell (21) via the connecting piece (24); the inner ring protrusion (23) is fixedly connected to the rotor (1); the inner ring protrusion (23) is embedded in a groove of the lower protective shell (21); the outer periphery of the inner ring protrusion (23) is plug-connected to the inner groove of the upper protective shell (22); the inner ring protrusion (23) is embedded in the grooves of the lower protective shell (21) and the upper protective shell (22), thereby enhancing the sealing performance between the rotor (1) and the lower protective shell (21) and the upper protective shell (22).

2. A sealing unit for a hydraulic slip ring according to claim 1, characterized in that: An oil inlet member (222) is provided on the upper protective shell (22), and the oil inlet member (222) is used to apply grease to the groove formed between the lower protective shell (21) and the upper protective shell (22); The oil inlet member (222) comprises an oil inlet (222a) and a sealing plug (222b); The oil inlet (222a) is opened at the top of the upper protective shell (22), and the sealing plug (222b) is used to control the opening and closing of the oil inlet (222a).

3. A sealing unit for a hydraulic slip ring according to claim 1, characterized in that: A limit pin (221) is processed on the upper protective shell (22), and the limit pin (221) is used to correct the installation positions of the lower protective shell (21) and the upper protective shell (22).

4. A sealing unit for a hydraulic slip ring according to claim 3, characterized in that: A limiting groove adapted to the limiting pin (221) is machined in the lower protective shell (21).

5. The sealing unit for a hydraulic slip ring according to claim 1, characterized in that: A sealing assembly (3) is installed on the rotor (1), and the sealing assembly (3) is used to enhance the sealing effect between the rotor (1) and the lower protective shell (21) and the upper protective shell (22); The sealing assembly (3) comprises an O-ring (31), a retaining ring (32), a sleeve ring (33) and a positioning pin (34); The O-ring (31) is sleeved on the rotor (1), and the O-ring (31) is arranged between the rotor (1) and the lower protective shell (21) and the upper protective shell (22); a retaining ring (32) is arranged on one side of the O-ring (31), and the retaining ring (32) and the rotor (1) are fixedly connected; a sleeve ring (33) is arranged on the other side of the O-ring (31), and the sleeve ring (33) is connected to the rotor (1) via the positioning pin (34).

6. A sealing unit for a hydraulic sliding ring according to claim 5, characterized in that: The positioning pins (34) are evenly distributed along the collar (33).

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