A patio hob with oil storage compensation balance system and oil injection method

Abstract

The present invention discloses a patio cutter with an oil storage compensation balancing system and an oil filling method, comprising a wheel body, a wheel axle, a bearing assembly and a sealing assembly arranged between the wheel body and the wheel axle, and a receiving groove adapted to the sealing assembly and the bearing assembly is provided between the wheel axle and the wheel body, and the present invention relates to the technical field of patio cutters. The patio cutter with an oil storage compensation balancing system and an oil filling method utilize the vibration of the cutter to generate suction inside the bearing assembly, and at the same time, the mud pressure acts on the oil storage bag, so that the lubricating oil in the oil storage bag continuously enters the receiving groove through the oil guide channel to lubricate the bearing assembly, and utilizes the oil storage bag to balance the pressure difference inside and outside the receiving groove when the cutter wheel body is working, so that the sealing assembly can work normally for a long time under a small inside-outside difference, prevents drilling fluid from entering the receiving groove and avoids the loss of lubricating fluid, and can store enough grease to continuously replenish the receiving groove, so that the bearing assembly works in a sealed state and under good lubrication conditions.

Description

Technical Field

[0001] The invention relates to the technical field of patio cutters, in particular to a patio cutter with an oil storage compensation balance system and an oil injection method. Background Art

[0002] As an important mining equipment and hydropower station construction equipment, the raise drill rig is widely used in underground transportation tunnels and shaft construction with stable geological conditions. It mainly uses hydraulic transmission to make the hydraulic motor obtain rotary torque, drive the drilling system, drive the drill rod and drill bit to rotate, and at the same time, the thrust cylinder applies thrust to the drill bit when drilling, and applies reverse lifting force to the cutter head when expanding the hole and acts on the rock. The raise cutter is the most important rock breaking tool, and the quality of the raise cutter reflects the quality of the raise drill.

[0003] The quality of the patio cutter is related to the bearing lubrication and the reliability of the seal. The bearing lubrication is related to the amount of grease filled in the bearing cavity. The amount of grease filled is related to the oil filling method. Conventional cutters use pressure oiling or filling oiling. There are places in the bearing cavity that cannot be filled with oil. There is dry friction when the bearing is working, and the dry friction heat causes the bearing to fail. At the same time, due to poor cooling conditions of the patio cutter, the dry friction heat of the bearing causes the sealing function ring to age early and lose its function, causing the metal seal to fail, and also causes rock chips to enter the bearing and cause early bearing failure.

[0004] For example, an externally oil-filled shield cutter described in application publication number CN113431591A injects grease from the middle to the cutter bearings on both sides, which cannot ensure that there is enough lubricating oil in the bearings. For example, a cutter internal pressure oil storage compensation pressure balance system and a cutter and a cutter assembly method described in application publication number CN108166986A do not have a vacuum oil injection structure, and internal pressure is generated by temperature and oil is injected by piston movement, which is inconvenient to use and is not conducive to the effective cooling of the skylight cutter and the protection of the seal. Therefore, a skylight cutter with an oil storage compensation balance system and an oil injection method are proposed. The vibration of the roller cutter causes suction inside the bearing assembly, and at the same time, the mud pressure acts on the oil storage bag, so that the lubricating oil in the oil storage bag continuously enters the receiving groove through the oil guide channel to lubricate the bearing assembly. At the same time, a seal is provided to prevent mud from entering the receiving groove through the seat cavity and to prevent the lubricating oil from leaking. Under the setting of the oil storage bag, the pressure difference inside and outside the receiving groove can be balanced when the roller cutter wheel body is working, so that the sealing assembly can work normally for a long time under a small inside and outside difference, prevent drilling fluid from entering the receiving groove and avoid the loss of lubricating fluid, and store enough grease to continuously replenish the receiving groove, so that the bearing assembly is in a sealed state and works under good lubrication conditions. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a patio cutter with an oil storage compensation balance system and an oil injection method, which solves the problem that the lubricating oil injection method of the patio cutter is inconvenient to use and is not conducive to the effective cooling of the patio cutter and the protection of the seal.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a patio cutter with an oil storage compensation balancing system, comprising a wheel body, a wheel axle, a bearing assembly and a sealing assembly arranged between the wheel body and the wheel axle, a receiving groove adapted to the sealing assembly and the bearing assembly is provided between the wheel axle and the wheel body, and a seat cavity connected to the corresponding receiving groove of the bearing assembly is provided on the surface of the large end of the wheel axle, an oil guide pin assembly is slidably installed in the seat cavity, wherein the oil guide pin assembly is used to limit the position of the bearing assembly and serves as a guide pin for introducing oil into the receiving groove A passage for lubricating oil, an oil storage bag is arranged inside the seat cavity and above the oil guide plug pin assembly, wherein the oil storage bag is used to store lubricating oil, and an oil bag pressure cover matched with the inner wall of the seat cavity is arranged on the outer periphery of the oil storage bag, the outer periphery of the oil bag pressure cover is clamped with the inner wall of the seat cavity through a hole retaining ring, and a retaining ring shield matched with the hole retaining ring is arranged on the inner surface of the seat cavity, an oil filling port connected with the seat cavity is opened on the surface of the large end of the wheel axle, and the oil filling port is arranged below the oil storage bag, and a screw plug is connected to the internal thread of the oil filling port.

[0009] By adopting the above technical scheme, the vibration of the roller cutter is used to generate suction inside the bearing assembly, and at the same time, the mud pressure acts on the oil storage bag, so that the lubricating oil in the oil storage bag continuously enters the receiving groove through the oil guide plug pin assembly to lubricate the bearing assembly. At the same time, a seal is provided to prevent the mud from entering the receiving groove through the seat cavity and to prevent the lubricating oil from leaking. Moreover, under the setting of the oil storage bag, the pressure difference inside and outside the receiving groove can be balanced when the roller cutter wheel body is working, so that the sealing assembly can work normally for a long time under a small inside-outside difference, prevent the drilling fluid from entering the receiving groove and avoid the loss of the lubricating fluid, and store enough grease to continuously replenish the receiving groove, so that the bearing assembly is in a sealed state and works under good lubrication conditions.

[0010] The present invention is further configured as follows: the oil guide plug assembly includes a cylinder, one end of the cylinder is provided with an oil storage cavity, the outer periphery of the cylinder is provided with an oil guide port adapted to the oil storage cavity, and the outer surface of the other end of the cylinder is provided with oil injection channels at even intervals.

[0011] By adopting the above technical solution, the position of the ball is limited by the cylinder, and the oil injection channel is set in coordination to ensure that the lubricating oil can flow effectively in the seat cavity, thereby ensuring the smooth balance of the pressure difference inside and outside the accommodating groove.

[0012] The present invention is further configured as follows: the bearing assembly includes a plurality of balls and a plurality of rollers matched with the accommodating grooves, and the size of the balls is matched with the inner surface of the seat cavity.

[0013] The present invention is further configured as follows: a balancing hole is provided on the top of the oil bag gland, and an annular groove is provided on the outer periphery of the oil bag gland, and a gland sealing ring matched with the inner surface of the seat cavity is provided inside the annular groove.

[0014] By adopting the above technical solution and setting the balance hole, it is ensured that the oil storage bag is connected with the external environment, thereby ensuring that the mud pressure is effectively applied to the oil storage bag during drilling, so that the lubricant in the oil storage bag is smoothly squeezed into the receiving groove.

[0015] The present invention is further configured as follows: the oil storage bag is made of rubber material.

[0016] By adopting the above technical solution, the oil storage bag made of rubber material can ensure that the external mud can effectively squeeze the oil storage bag through the balance hole, thereby ensuring that the lubricating oil in the oil storage bag is effectively squeezed into the containing groove, and at the same time can further increase the oil storage capacity of the oil storage bag.

[0017] The present invention also discloses an oil injection method for a patio cutter with an oil storage compensation balance system, which specifically comprises the following steps:

[0018] Step 1: Vacuum extraction: When filling oil, use a vacuum oil filling machine to evacuate the tank to a vacuum degree of -1×10 5 to -0.97×10 5 Pa ;

[0019] Step 2: Oil filling: After turning off the vacuum pump, maintain the vacuum state for 10-15 minutes, and then inject the required amount of lubricating oil into the seat cavity through the oil filling port. The oil filling pressure is 965-2500Pa. The lubricating oil flows into the receiving groove through the oil filling channel to lubricate the surface of the ball. As the lubricating oil is injected, part of the lubricating oil flows into the oil storage cavity through the oil guide port until it flows into the oil storage bag. After completing the injection of the required amount of lubricating oil, tighten the screw plug to complete the oil filling.

[0020] (III) Beneficial effects

[0021] The present invention provides a patio hob with an oil storage compensation balance system and an oil injection method. It has the following beneficial effects:

[0022] (1) The shaft cutter with oil storage compensation balance system and oil filling method utilizes the vibration of the cutter to generate suction inside the bearing assembly. At the same time, the mud pressure acts on the oil storage bag, so that the lubricating oil in the oil storage bag continuously enters the receiving groove through the oil guide channel to lubricate the bearing assembly. At the same time, a seal is provided to prevent the mud from entering the receiving groove through the seat cavity and to prevent the lubricating oil from leaking. In addition, under the setting of the oil storage bag, the pressure difference between the inside and outside of the receiving groove can be balanced when the cutter wheel body is working, so that the sealing assembly can work normally for a long time under a small inside-outside difference, prevent the drilling fluid from entering the receiving groove and avoid the loss of the lubricating fluid, and store enough grease to continuously replenish the receiving groove, so that the bearing assembly is in a sealed state and works under good lubrication conditions.

[0023] (2) The ceiling roller with oil storage compensation balancing system and the oil filling method, by using the cylinder to limit the position of the ball, ensures the effective circulation of the lubricating oil in the seat cavity under the coordinated setting of the oil filling channel, thereby ensuring the smooth balance of the pressure difference inside and outside the receiving groove.

[0024] (3) The shaft cutter with oil storage compensation balance system and oil injection method ensures that the oil storage bag is connected with the external environment through the setting of the balance hole, thereby ensuring that the mud pressure is effectively applied to the oil storage bag during the drilling process, so that the lubricant in the oil storage bag is smoothly squeezed into the receiving groove.

[0025] (4) The ceiling cutter with oil storage compensation balance system and oil injection method can ensure that the external mud can effectively squeeze the oil storage bag through the balance hole through the oil storage bag, thereby ensuring that the lubricating oil in the oil storage bag is effectively squeezed into the receiving groove, and at the same time can further increase the oil storage capacity of the oil storage bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the internal structure of the axle of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the oil guide plug pin assembly of the present invention;

[0029] Figure 4 It is a schematic diagram of the structure of the oil storage bag of the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the oil bag gland and the balancing hole of the present invention.

[0031] In the figure, 1. wheel body; 2. wheel axle; 3. bearing assembly; 4. sealing assembly; 5. receiving groove; 6. seat cavity; 7. oil guide plug pin assembly; 8. oil storage bag; 9. oil bag pressure cover; 10. retaining ring for hole; 11. retaining ring shield; 12. oil filling port; 13. screw plug; 14. cylinder; 15. oil storage cavity; 16. oil guide port; 17. oil filling channel; 18. ball; 19. roller; 20. balance hole; 21. pressure cover sealing ring. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-5 The embodiment of the present invention provides a technical solution: a roof hob with oil storage compensation balance system, comprising a wheel body 1, a wheel axle 2, a bearing assembly 3 and a sealing assembly 4 arranged between the wheel body 1 and the wheel axle 2, as shown in the attached Figure 1 As shown, the bearing assembly 3 includes a plurality of balls 18 and a plurality of rollers 19 adapted to the accommodating grooves 5, and the size of the balls 18 is adapted to the inner surface of the seat cavity 6, wherein two groups of sealing assemblies 4 are provided, and the two groups of sealing assemblies 4 are respectively arranged on the left and right sides of the bearing assembly 3.

[0034] As a preferred solution, in order to ensure the stable placement of the bearing assembly 3 and the sealing assembly 4, a receiving groove 5 adapted to the sealing assembly 4 and the bearing assembly 3 is provided between the wheel axle 2 and the wheel body 1. Figure 2 As shown, a notch is provided on the surface of the axle 2 to cooperate with the receiving groove 5 .

[0035] As a preferred solution, a seat cavity 6 connected to the corresponding receiving groove 5 of the bearing assembly 3 is opened on the surface of the large end of the wheel axle 2, and an oil guide pin assembly 7 is slidably installed in the seat cavity 6, wherein the oil guide pin assembly 7 is used to limit the position of the bearing assembly 3 and serves as a channel for introducing lubricating oil into the receiving groove 5. Specifically, the oil guide pin assembly 7 includes a cylinder 14, one end of the cylinder 14 is provided with an oil storage cavity 15, and the outer periphery of the cylinder 14 is opened with an oil guide port 16 adapted to the oil storage cavity 15, and the outer surface of the other end of the cylinder 14 is evenly spaced with oil injection channels 17. As a detailed explanation, the diameter of the two ends of the cylinder 14 is larger than the diameter of the middle part, which is used to contact the inner surface of the seat cavity 6.

[0036] An oil storage bag 8 is arranged inside the seat cavity 6 and above the oil guide plug pin assembly 7, wherein the oil storage bag 8 is used to store lubricating oil. Specifically, the oil storage bag 8 is made of rubber material, and the outer periphery of the oil storage bag 8 is provided with an oil bag pressure cover 9 which is adapted to the inner wall of the seat cavity 6, the outer periphery of the oil bag pressure cover 9 is clamped with the inner wall of the seat cavity 6 through a hole retaining spring 10, and the inner surface of the seat cavity 6 is provided with a retaining spring shield 11 which is adapted to the hole retaining spring 10, an oil filling port 12 which is connected to the seat cavity 6 is opened on the surface of the large end of the wheel axle 2, and the oil filling port 12 is arranged below the oil storage bag 8, and the internal thread of the oil filling port 12 is connected with a screw plug 13.

[0037] As a detailed explanation, in order to ensure that the external mud pressure is effectively applied to the oil storage bag 8 during drilling, a balance hole 20 is opened on the top of the oil bag pressure cover 9, and an annular groove is opened on the outer periphery of the oil bag pressure cover 9, and a pressure cover sealing ring 21 adapted to the inner surface of the seat cavity 6 is arranged inside the annular groove.

[0038] The above-mentioned oil filling method of a patio cutter with an oil storage compensation balance system specifically comprises the following steps:

[0039] Step 1: Vacuum extraction: When filling oil, use a vacuum oil filling machine to evacuate the containing tank 5 to a vacuum degree of -1×10 5 to -0.97×10 5 Pa ;

[0040] Step 2, oil filling: After turning off the vacuum pump, maintain the vacuum state for 10-15 minutes, and then inject the required amount of lubricating oil into the seat cavity 6 through the oil filling port 12. The oil filling pressure is 965-2500Pa. The lubricating oil flows into the receiving groove 5 through the oil filling channel 17 to lubricate the surface of the ball 18. As the lubricating oil is injected, part of the lubricating oil flows into the oil storage cavity 15 through the oil guide port 16 until it flows into the oil storage bag 8. After completing the injection of the required amount of lubricating oil, tighten the screw plug 13 to complete the oil filling.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A patio cutter with an oil storage compensation balancing system, comprising a wheel body (1), a wheel axle (2), a bearing assembly (3) and a sealing assembly (4) arranged between the wheel body (1) and the wheel axle (2), characterized in that: A receiving groove (5) adapted to the sealing assembly (4) and the bearing assembly (3) is provided between the wheel axle (2) and the wheel body (1), and a seat cavity (6) connected to the receiving groove (5) corresponding to the bearing assembly (3) is provided on the surface of the large end of the wheel axle (2). An oil guide pin assembly (7) is slidably mounted on the seat cavity (6), wherein the oil guide pin assembly (7) is used to limit the position of the bearing assembly (3) and serves as a channel for introducing lubricating oil into the receiving groove (5). An oil storage bag (8) is provided inside the seat cavity (6) and above the oil guide pin assembly (7), wherein the oil storage bag (8) is provided. The bag (8) is used to store lubricating oil, and the outer periphery of the oil storage bag (8) is provided with an oil bag pressure cover (9) matched with the inner wall of the seat cavity (6), the outer periphery of the oil bag pressure cover (9) is clamped with the inner wall of the seat cavity (6) through a hole retaining ring (10), and the inner surface of the seat cavity (6) is provided with a retaining ring shield (11) matched with the hole retaining ring (10), the surface of the large end of the wheel axle (2) is provided with an oil filling port (12) connected with the seat cavity (6), and the oil filling port (12) is arranged below the oil storage bag (8), and the inner thread of the oil filling port (12) is connected with a screw plug (13); The oil guide plug assembly (7) comprises a cylinder (14), one end of the cylinder (14) is provided with an oil storage cavity (15), the outer circumference of the cylinder (14) is provided with an oil guide port (16) adapted to the oil storage cavity (15), and the outer surface of the other end of the cylinder (14) is provided with oil injection channels (17) at even intervals; A balancing hole (20) is provided at the top of the oil bag gland (9), and an annular groove is provided at the outer periphery of the oil bag gland (9). A gland sealing ring (21) adapted to the inner surface of the seat cavity (6) is provided inside the annular groove.

2. A ceiling cutter with oil storage compensation balance system according to claim 1, characterized in that: The bearing assembly (3) comprises a plurality of balls (18) and a plurality of rollers (19) matched with the receiving groove (5), and the size of the balls (18) is matched with the inner surface of the seat cavity (6).

3. The patio cutter with oil storage compensation balance system according to claim 1, characterized in that: The oil storage bag (8) is made of rubber material.

4. A method for oiling a ceiling cutter with an oil storage compensation balance system according to any one of claims 1 to 3, characterized in that: The specific steps include: Step 1: Vacuum extraction: When filling oil, use a vacuum oil filling machine to evacuate the holding tank (5) to a vacuum degree of -1×10 5 to -0.97×10 5 Pa ; Step 2, oil filling: After turning off the vacuum pump, maintain the vacuum state for 10-15 minutes, then inject the required amount of lubricating oil into the seat cavity (6) through the oil filling port (12), the oil filling pressure is 965-2500Pa, the lubricating oil flows into the receiving groove (5) through the oil filling channel (17), and lubricates the surface of the ball (18). As the lubricating oil is injected, part of the lubricating oil flows into the oil storage cavity (15) through the oil guide port (16) until it flows into the oil storage bag (8). After the required amount of lubricating oil is injected, tighten the screw plug (13) to complete the oil filling.

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