Gap adjusting device of floating oil seal

Abstract

The invention discloses a clearance adjusting device of a floating oil seal, and belongs to the technical field of coal mining machines. A clearance adjusting device of a floating oil seal is suitable for a rocker arm of a coal mining machine and comprises a static ring fixed to a bearing seat. The movable ring is detachably connected with the roller connecting sleeve, and an axial mounting gap is formed between the movable ring and the static ring; the roller connecting sleeve sleeves the roller; the adjusting piece is connected / propped against the movable ring and extends into the roller connecting sleeve; the adjusting hole penetrates through the roller and the roller connecting sleeve and corresponds to the position of the adjusting piece; the floating oil seal is installed in an installation ring cavity jointly formed by the movable ring, the static ring and the roller connecting sleeve, the adjusting piece is operated through the adjusting hole so as to adjust the axial position of the movable ring, and disassembly-free adjustment of an installation gap is achieved. By the adoption of the device, the installation gap of the coal mining machine rocker arm floating oil seal can be rapidly adjusted under the condition that the roller and the roller connecting sleeve are not detached, the coal mining machine rocker arm floating oil seal is made to be in a proper working state, and the working efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mining machine, in particular to a gap adjusting device of floating oil seal. BACKGROUND

[0002] The floating oil seal of the coal mining machine is a key rotating sealing component of the output end of the rocker arm, and the sealing reliability thereof directly determines the operation stability of the whole coal mining machine. The floating oil seal is composed of a static ring, a dynamic ring and two O-rings on the two sides, and a specific axial installation gap is formed between the dynamic ring and the static ring after installation. The size of the gap has a decisive influence on the working state of the floating oil seal: if the gap is too large, the lubricating oil in the planetary mechanism will leak through the sealing interface, causing the gear system to be damaged due to lack of oil; if the gap is too small, the specific pressure of the floating oil seal will be too large, the friction temperature rise of the metal ring will be intensified, and the O-ring will be overheated and ablated. Therefore, maintaining an accurate installation gap is the core prerequisite for ensuring the function of the floating oil seal.

[0003] Currently, the industry generally relies on the general gap value recommended by the manufacturer based on the model of the floating oil seal. However, in actual working conditions, factors such as the machining tolerance of the installation groove, underground vibration impact, temperature change and part wear will cause the initially set gap to deviate from the ideal state. The traditional adjustment method requires dismounting the drum and the planetary mechanism connecting sleeve of the coal mining machine, and adjusting the gap by adding or reducing the metal adjusting pads arranged on the end face. This process not only consumes a lot of working hours and interrupts production, but also has operation risks in the space-limited underground environment, significantly reducing the coal mining efficiency. SUMMARY

[0004] The present application aims to solve the above problems, and provides a gap adjusting device of floating oil seal.

[0005] The purpose of the present application is achieved in that:

[0006] A gap adjusting device of floating oil seal, suitable for a coal mining machine rocker arm, comprising:

[0007] a static ring fixed to a bearing seat;

[0008] a dynamic ring detachably connected with a drum connecting sleeve, an installation gap being formed axially between the dynamic ring and the static ring; the drum connecting sleeve is sleeved on a drum;

[0009] an adjusting piece connected / abutted to the dynamic ring and extending into the drum connecting sleeve;

[0010] an adjusting hole penetrating through the drum and the drum connecting sleeve, the adjusting hole corresponding to the position of the adjusting piece;

[0011] The floating oil seal is installed in the mounting ring cavity formed by the dynamic ring, the static ring and the drum connecting sleeve, the axial position of the dynamic ring is adjusted by operating the adjusting member through the adjusting hole, and the disassembly-free adjustment of the mounting gap is realized.

[0012] The detachable connection between the dynamic ring and the drum connecting sleeve is realized by the anti-rotation pin, the anti-rotation pin is in interference fit with the dynamic ring, and the anti-rotation pin is in clearance fit with the drum connecting sleeve.

[0013] The anti-rotation pin is provided with a plurality of anti-rotation pins, and the plurality of anti-rotation pins are uniformly distributed along the circumferential direction of the dynamic ring.

[0014] The adjusting member is provided with a plurality of adjusting members, and the plurality of adjusting members are uniformly distributed along the circumferential direction of the dynamic ring.

[0015] The drum connecting sleeve and the mating surface of the dynamic ring are provided with a plurality of jackscrew holes.

[0016] The adjusting hole includes a first through hole penetrating through the drum and a second through hole penetrating through the drum connecting sleeve, the first through hole and the second through hole are coaxial, and the hole diameter of the first through hole is greater than that of the second through hole.

[0017] The end of the first through hole close to the outer side is provided with a detachable first dustproof screw plug, and / or the end of the second through hole close to the first through hole is provided with a detachable second dustproof screw plug.

[0018] The adjusting member is an adjusting screw, and a one-way slot is formed in the head of the adjusting screw.

[0019] The head of the first dustproof screw plug and the head of the second dustproof screw plug are provided with an internal hexagonal recess.

[0020] The static ring is fixed on the bearing seat by a connecting screw and a gasket.

[0021] The circumferential mating surface of the static ring and the bearing seat is also provided with a sealing ring.

[0022] The adjusting hole is also used for measuring the mounting gap.

[0023] The distance from the outer end surface of the drum to the adjusting member is measured by inserting a depth measuring ruler into the adjusting hole, so as to calculate the value of the mounting gap.

[0024] The beneficial effect of the present application is that by using the gap adjusting device of the floating oil seal, the installation gap of the floating oil seal of the rocker arm of the coal mining machine can be quickly adjusted without removing the roller and the roller connecting sleeve, the floating oil seal of the coal mining machine is in a suitable working state, the time-consuming and laborious removal and recovery work is avoided, the manpower and material resources are greatly saved, and the work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The structure schematic diagram of an embodiment of the gap adjusting device of the floating oil seal is shown.

[0026] Explanation of reference signs:

[0027] 1 - bearing seat;

[0028] 2 - connecting screw and gasket;

[0029] 3 - static ring sealing ring;

[0030] 4 - static ring;

[0031] 5 - floating oil seal;

[0032] 6 - anti-rotation pin;

[0033] 7 - dynamic ring sealing ring;

[0034] 8 - dynamic ring;

[0035] 9 - adjusting screw;

[0036] 10 - roller connecting sleeve;

[0037] 11 - second dustproof screw plug;

[0038] 12 - roller;

[0039] 13 - roller connecting bolt;

[0040] 14 - roller gasket

[0041] 15 - first dustproof screw plug. DETAILED DESCRIPTION

[0042] Various embodiments of the present application will be described with reference to the accompanying drawings. In the description and drawings, elements with similar structures or functions will be denoted by the same element symbol. It can be understood that the drawings are used only for reference and illustration, and are not intended to limit the present application. The sizes shown in the drawings are only for clear description, and do not limit the proportions or exhaustively describe the present application, nor limit the scope of the present application.

[0043] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0044] The invention provides a floating oil seal clearance adjustment device suitable for a coal mining machine rocker arm.

[0045] In one embodiment, if Figure 1 As shown, a gap adjustment device for a floating oil seal includes a stationary ring 4, a dynamic ring 8, an adjustment hole and an adjustment member.

[0046] Among them, the stationary ring 4 is fixed to the bearing seat 1. The dynamic ring 8 and the roller connecting sleeve 10 are detachably connected, and an axial installation gap is formed between the dynamic ring 8 and the stationary ring 4 ( Figure 1 The roller connecting sleeve 10 is sleeved on the roller 12. The adjusting member is connected to or abuts against the movable ring 8 and extends into the roller connecting sleeve 10. The adjusting hole passes through the roller 12 and the roller connecting sleeve 10, and the adjusting hole corresponds to the position of the adjusting member.

[0047] The dynamic ring 8, the stationary ring 4, and the roller connecting sleeve 10 together form a mounting ring cavity for mounting the floating oil seal 5. The axial position of the dynamic ring 8 can be adjusted by operating the adjustment member through the adjustment hole, achieving disassembly-free adjustment of the installation clearance. This avoids time-consuming and laborious disassembly and restoration work, greatly saving manpower and material resources and improving work efficiency.

[0048] Specifically, the stationary ring 4 is fixed to the bearing seat 1 by connecting screws and washers. A stationary ring sealing ring 3 is also provided on the circumferential mating surface between the stationary ring 4 and the bearing seat to increase the rigidity of the stationary ring 4.

[0049] Specifically, the movable ring 8 and the roller connecting sleeve 10 are detachably connected via the anti-rotation pin 6. The anti-rotation pin 6 and the movable ring 8 have an interference fit, while the anti-rotation pin 6 and the roller connecting sleeve 10 have a clearance fit. At the same time, multiple screw holes are provided on the mating surfaces of the roller connecting sleeve 10 and the movable ring 8 to facilitate the installation and removal of the movable ring 8.

[0050] In an actual configuration, multiple anti-rotation pins 6 are provided (e.g., eight or four), and the multiple anti-rotation pins 6 are evenly distributed along the circumference of the movable ring 8. Alternatively, multiple adjustment members may be provided (e.g., eight or four), and the multiple adjustment members are evenly distributed along the circumference of the movable ring 8. The specific number of adjustment members provided is determined based on actual needs and is typically an even number for even distribution.

[0051] The adjusting hole penetrates the roller 12 and the roller connecting sleeve 10, and thus actually comprises two parts of a first through hole penetrating the roller 12 and a second through hole penetrating the roller connecting sleeve 10, the first through hole and the second through hole are coaxial, and the hole diameter of the first through hole is larger than that of the second through hole. The first through hole is provided with a detachable first dustproof plug 15 at the end close to the outer side, and the second through hole is provided with a detachable second dustproof plug 11 at the end close to the first through hole. Through the setting of the two dustproof plugs, the effect of preventing the outside coal dust from entering the space of the floating oil seal 5 is achieved twice.

[0052] In order to facilitate the adjustment of the installation gap, the adjusting member can actually adopt an adjusting screw 9, the head of the adjusting screw 9 is provided with a slot, and the heads of the first dustproof plug 15 and the second dustproof plug 11 are both provided with an internal hexagonal recess. When adjustment is needed, the first dustproof plug 15 and the second dustproof plug 11 are unscrewed by using a magnetic internal hexagonal wrench, and then are taken out from the adjusting hole, and then the adjustment of the installation gap can be realized by adjusting the tightness of the adjusting screw 9 through a slot screwdriver.

[0053] The size of the installation gap can be measured through the adjusting hole. After the adjustment of the installation gap, the distance from the outer end surface of the roller 12 to the adjusting member (i.e. the adjusting screw 9) can be conveniently measured by inserting the depth measuring ruler into the adjusting hole, so as to calculate the value of the installation gap.

[0054] Through the use of the above floating oil seal 5 gap adjusting device, the installation gap of the floating oil seal 5 on the rocker arm of the coal mining machine can be quickly adjusted without dismounting the roller 12 and the connecting sleeve, the floating oil seal 5 is in a suitable working state, the time-consuming and laborious dismounting and recovery work is avoided, and the manpower and material resources are greatly saved, and the work efficiency is improved.

[0055] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and these changes and modifications all fall within the protection scope of the present application.

Claims

1. A gap adjustment device for a floating oil seal suitable for use in a shearer boom, characterised in that, The application relates to a floating oil seal device for a rolling mill, which comprises the following parts: a static ring fixed on a bearing seat; a dynamic ring detachably connected with a rolling mill connecting sleeve, an installation gap being formed between the dynamic ring and the static ring, the rolling mill connecting sleeve being sleeved on a rolling mill; an adjusting part connected with or abutting against the dynamic ring and extending into the rolling mill connecting sleeve; an adjusting hole penetrating through the rolling mill and the rolling mill connecting sleeve, the adjusting hole corresponding to the position of the adjusting part; wherein the floating oil seal is installed in an installation ring cavity formed by the dynamic ring, the static ring and the rolling mill connecting sleeve, the adjusting hole is used to operate the adjusting part to adjust the axial position of the dynamic ring, and the installation gap is adjusted without disassembly.

2. The gap adjustment device of the floating oil seal according to claim 1, characterized by The dynamic ring and the rolling mill connecting sleeve are detachably connected through anti-rotation pins, the anti-rotation pins are in interference fit with the dynamic ring, and the anti-rotation pins are in clearance fit with the rolling mill connecting sleeve.

3. A gap adjusting device for a floating oil seal according to claim 2, wherein The anti-rotation pins are provided in plurality, and the anti-rotation pins are uniformly distributed along the circumferential direction of the dynamic ring. The adjusting part is provided in plurality, and the adjusting parts are uniformly distributed along the circumferential direction of the dynamic ring.

4. The gap adjusting device of a floating oil seal according to claim 3, characterized by A plurality of jackscrew holes are arranged on the fitting surface of the rolling mill connecting sleeve and the dynamic ring.

5. The lash adjustment device for a floating oil seal of claim 1, wherein, The adjusting hole comprises a first through hole penetrating through the rolling mill and a second through hole penetrating through the rolling mill connecting sleeve, the first through hole and the second through hole are coaxial, and the hole diameter of the first through hole is larger than that of the second through hole. The end of the first through hole close to the outer side is provided with a detachable first dustproof screw plug, and the end of the second through hole close to the first through hole is provided with a detachable second dustproof screw plug.

6. A lash adjuster for a floating oil seal as set forth in claim 5, wherein The adjusting part is an adjusting screw, and a one-way slot is arranged in the head of the adjusting screw. The head of the first dustproof screw plug and the head of the second dustproof screw plug are provided with an internal hexagonal recess.

7. The lash adjustment device of the floating oil seal of claim 1, wherein, The static ring is fixed on the bearing seat through a connecting screw and a gasket.

8. The lash adjustment device of the floating oil seal of claim 1, wherein, A sealing ring is further arranged on the circumferential fitting surface of the static ring and the bearing seat.

9. A gap adjusting device for a floating oil seal according to any one of claims 1 to 8, characterized in that, The adjusting hole is also used for measuring the installation gap. The distance from the outer end surface of the rolling mill to the adjusting part is measured by inserting a depth measuring ruler into the adjusting hole, so that the value of the installation gap is calculated.

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