Oil leakage prevention device of speed reducer

Abstract

The utility model relates to the technical field of speed reducer sealing, in particular to a speed reducer oil leakage prevention device which comprises an oil cooling device and an air pressure balancing device. The oil cooling device comprises a cooling water tank, an S-shaped oil guide elbow is arranged in the cooling water tank, one end of the S-shaped oil guide elbow is connected with a conical cover through a second electric control valve, a temperature sensor is arranged in the conical cover, a reflux pump is arranged on the outer side face of the cooling water tank, and the other end of the S-shaped oil guide elbow is connected with a liquid inlet of the reflux pump. A liquid outlet of the reflux pump is connected with the speed reducer outer shell through a reflux pipe, and an electric control valve I is mounted on the reflux pipe; according to the oil leakage prevention device for the speed reducer, oil in the speed reducer is cooled, so that the problems of local stress concentration and sealing structure failure caused by mismatching of thermal expansion coefficients of sealing materials due to insufficient temperature control capacity can be effectively solved, the air pressure in the speed reducer can be adjusted through air pressure balance, and in the air pressure adjusting and controlling process, the oil leakage is prevented. And splashing of oil liquid cannot be caused.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of reducer sealing, in particular to a reducer oil leakage prevention device. BACKGROUND

[0002] The reducer has long existed in the industrial transmission system, and the sealing failure problem is caused by the deterioration of the oil thermodynamic characteristics (oil temperature > 85 DEG C) and the internal pressure dynamic imbalance (fluctuation amplitude + 15 kPa). According to industry statistics, 72% of the reducer oil leakage accidents are caused by the sealing interface damage under the coupling effect of high temperature and high pressure. The traditional solution relies on the combined sealing structure (such as the composite application of rubber sealing ring and sealing glue), but the thermal stability and deformation adaptability are insufficient, and it is difficult to match the dynamic sealing demand under complex working conditions.

[0003] The existing reducer sealing system has significant technical bottlenecks: first, the passive heat dissipation design relies on the natural convection heat exchange of the shell, and the heat dissipation efficiency is only 1.2-1.8 W / (m2 K). Under high load working conditions (the oil temperature can rise to more than 85 DEG C), the temperature control capacity is insufficient, which causes the mismatch of the thermal expansion coefficient of the sealing material, and causes the local stress concentration and sealing structure failure; second, the gas pressure balancing device mainly uses the mechanical breathing valve, and the one-way pressure relief mechanism is easy to cause functional blockage (blockage rate > 35%) due to dust accumulation, and the oil mist escape rate is as high as 12-18% during the pressure relief process, which aggravates the lubricating oil loss and environmental pollution. SUMMARY

[0004] The application provides a reducer oil leakage prevention device, which can effectively avoid the local stress concentration and sealing structure failure caused by the mismatch of the thermal expansion coefficient of the sealing material due to the insufficient temperature control capacity by cooling the oil in the reducer, and can adjust the gas pressure in the reducer through gas pressure balancing, thereby effectively solving the problems in the background art.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme: a reducer oil leakage prevention device, comprising an oil cooling device and a gas pressure balancing device; the oil cooling device comprises a cooling water tank, an S-shaped oil guide elbow is arranged in the cooling water tank, one end of the S-shaped oil guide elbow is connected with a conical cover through an electric control valve two, a temperature sensor is arranged in the conical cover, a backflow pump is arranged on the outer side of the cooling water tank, the other end of the S-shaped oil guide elbow is connected with the liquid inlet of the backflow pump, the liquid outlet of the backflow pump is connected with the reducer outer shell through a backflow pipe, and an electric control valve one is installed on the backflow pipe.

[0006] The air pressure balancing device comprises a gas guide pipe installed above the reducer outer shell, the outer side of the gas guide pipe is provided with a pear-shaped splash guard, the pear-shaped splash guard divides the gas guide pipe into upper and lower two sections, the lower section of the gas guide pipe is connected with the reducer outer shell, the upper section of the gas guide pipe is connected with a filter box, the inside of the filter box is provided with a dust screen, and the inside of the pear-shaped splash guard is provided with a plurality of splash boards.

[0007] Preferably, the outer side of the S-shaped oil guide elbow is uniformly provided with radiating fins.

[0008] Preferably, the conical cover is communicated with the inside of the reducer, and the conical cover is sealingly connected with the lower surface of the reducer outer shell.

[0009] Preferably, the front side of the cooling water tank is provided with a drain pipe at the lower end, and the drain pipe is provided with a drain valve.

[0010] Preferably, the upper end of the return pipe is provided with a sealing flange plate, and the sealing flange plate is fixed on the reducer outer shell through bolts.

[0011] Preferably, the outer side of the filter box is provided with a gas permeation pipe with an opening downward.

[0012] Preferably, the splash boards are arranged in a staggered manner.

[0013] Compared with the prior art, the application has the following beneficial effects:

[0014] 1. The oil leakage prevention device of the reducer can effectively avoid the problems of local stress concentration and sealing structure failure caused by the mismatch of the thermal expansion coefficient of the sealing material due to the insufficient temperature control capacity, and can adjust the air pressure in the reducer through air pressure balancing, and the air permeation hole is not easy to be blocked and will not cause oil splashing during the air pressure regulation process;

[0015] 2. The S-shaped oil guide elbow + radiating fin composite structure, combined with the circulating cooling water system, can greatly reduce the oil temperature, effectively control the oil temperature ≤70℃, avoid the mismatch of the thermal expansion coefficient of the sealing material, and the ladder-shaped splash board in the pear-shaped splash guard can intercept the oil mist, thereby reducing the escape rate of the oil mist;

[0016] 3. The dust screen + gas permeation pipe combination design enables the reducer equipment to continuously operate in a dusty environment, the detachable dust screen design reduces the maintenance cost, and the gas guide pipe is used for adjusting the air pressure inside and outside the reducer. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 1 is a structural schematic view of the oil liquid cooling device in the application;

[0018] Figure 2 Fig. 2 is a front view of the oil liquid cooling device in the application;

[0019] Figure 3 It is the front view of the air pressure balancing device in the application;

[0020] Figure 4 It is the front view of the air pressure balancing device in the application;

[0021] Figure 5 It is the schematic diagram of the installation position on the gearbox shell in the application.

[0022] In the figure: 1 conical cover, 2 S-shaped oil guide elbow, 3 sealing flange, 4 electric control valve one, 5 backflow pipe, 6 drain valve, 7 drain pipe, 8 cooling water tank, 9 cooling fin, 10 electric control valve two, 11 temperature sensor, 12 backflow pump, 13 filter box, 14 air pipe, 15 pear-shaped splash guard, 16 air guide pipe, 17 splash plate, 18 dust screen. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0024] In the description of the application, if the orientation description such as "up", "down", "front", "back", "left", "right" and the like is involved, the orientation or position relationship indicated is based on the drawings and only for the convenience of describing the application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. When a feature is referred to as "provided", "fixed", "connected" to another feature, it can be directly provided, fixed or connected to the other feature, or indirectly provided, fixed or connected to the other feature. Figure 2 The orientation or position relationship shown is only for the convenience of describing the application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. When a feature is referred to as "provided", "fixed", "connected" to another feature, it can be directly provided, fixed or connected to the other feature, or indirectly provided, fixed or connected to the other feature.

[0025] Please refer to Figures 1-5 The application provides the following technical solutions: an oil leakage prevention device for a reducer, comprising an oil liquid cooling device and an air pressure balancing device; the oil liquid cooling device comprises a cooling water tank 8, an S-shaped oil guide elbow 2 is arranged in the cooling water tank 8, one end of the S-shaped oil guide elbow 2 is connected with a conical cover 1 through an electric control valve two 10, a temperature sensor 11 is arranged in the conical cover 1, a backflow pump 12 is arranged on the outer side of the cooling water tank 8, the other end of the S-shaped oil guide elbow 2 is connected with the liquid inlet of the backflow pump 12, the liquid outlet of the backflow pump 12 is connected with the reducer shell through a backflow pipe 5, and an electric control valve one 4 is installed on the backflow pipe 5.

[0026] Specifically, the air pressure balancing device is installed on the top of the reducer housing, the oil cooling device is installed on the bottom of the reducer housing, the cooling water tank 8 is internally provided with cold water, the S-shaped oil guide elbow 2 is immersed in the cold water, and the temperature sensor 11 is used for detecting the oil temperature in the reducer. When the oil temperature is too high, the electric control valve and the backflow pump 12 are synchronously opened, and the backflow pump 12 pushes the oil to circulate and cool.

[0027] The air pressure balancing device comprises a gas guide pipe 16 installed above the reducer housing, the outer side of the gas guide pipe 16 is provided with a pear-shaped splash guard 15, the pear-shaped splash guard 15 divides the gas guide pipe 16 into upper and lower two sections, the lower section of the gas guide pipe is connected with the reducer housing, and the upper section of the gas guide pipe is connected with a filter box 13, the inside of the filter box 13 is provided with a dust screen 18, and the inside of the pear-shaped splash guard 15 is provided with a plurality of splash boards 17.

[0028] Specifically, the inside of the pear-shaped splash guard 15 is internally provided with an air pressure sensor, when the pressure is released, the electric control valve arranged on the gas guide pipe 16 is opened, high-pressure gas carries a small amount of atomized oil and sprays the splash boards 17 in the pear-shaped splash guard 15, the gasified oil is liquefied on the splash boards 17 by cooling, and finally reflows into the transmission housing.

[0029] Preferably, the outer side of the S-shaped oil guide elbow 2 is uniformly provided with a plurality of cooling fins 9.

[0030] Specifically, the cooling fins 9 increase the contact area between the cold water and the heat source, thereby accelerating heat exchange.

[0031] Preferably, the conical cover 1 is in communication with the inside of the reducer, and the conical cover 1 is sealingly connected with the lower surface of the reducer housing.

[0032] Specifically, the connection between the device and the reducer housing is sealingly connected.

[0033] Preferably, the front side of the cooling water tank 8 is provided with a drain pipe 7 at the lower end, and the drain pipe 7 is provided with a drain valve 6.

[0034] Specifically, the drain pipe 7 is used for discharging high-temperature water in the cooling water tank 8.

[0035] Preferably, the upper end of the backflow pipe 5 is provided with a sealing flange 3, and the sealing flange 3 is fixed on the reducer housing by bolts.

[0036] Preferably, the outer side of the filter box 13 is provided with a gas permeable pipe 14 with an opening downward.

[0037] Specifically, the opening downward can effectively prevent dust from entering the inside of the filter box 13.

[0038] Preferably, the splash boards 17 are arranged in a staggered manner.

[0039] Specifically, the multi-layer splash guard 17 is arranged to facilitate the recovery of oil.

[0040] In use: when the temperature sensor 11 arranged inside the conical cover 1 detects that the oil temperature inside the reducer is too high, the electrically controlled valve 1 and the electrically controlled valve 2 are opened, and the reflux pump 12 is opened synchronously, the reflux pump 12 pumps the high-temperature oil into the S-shaped oil guide bend 2 for circulating cooling.

[0041] When the reducer is depressurized, the high-temperature gas carries a small amount of atomized oil and sprays it onto the splash guard 17 inside the pear-shaped splash guard 15, the gasified oil liquefies and condenses on the splash guard 17, and finally flows back into the transmission housing.

[0042] It is worth noting that the input ends of the electrically controlled valve 1, the electrically controlled valve 2, the temperature sensor 11 and the reflux pump 12 are electrically connected to the output end of the external power supply through an external control switch.

[0043] Although the embodiments of the present application have been shown and described, it is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A speed reducer oil leakage preventing device characterized by comprising: Including oil liquid cooling device and air pressure balance device, the oil liquid cooling device includes cooling water tank (8), the inside of cooling water tank (8) is equipped with S-shaped oil guide elbow (2), one end of S-shaped oil guide elbow (2) is connected with conical cover (1) through electric control valve two (10), the inside of conical cover (1) is equipped with temperature sensor (11), the outside of cooling water tank (8) is provided with backflow pump (12), the other end of S-shaped oil guide elbow (2) is connected with the liquid inlet of backflow pump (12), the liquid outlet of backflow pump (12) is connected with the reducer housing through backflow pipe (5), electric control valve one (4) is installed on backflow pipe (5). The air pressure balance device includes guide pipe (16) installed on the upper of reducer housing, the outside of guide pipe (16) is provided with pear-shaped splash guard (15), pear-shaped splash guard (15) divides guide pipe (16) into two sections, the lower section guide pipe is connected with reducer housing, the upper section guide pipe is connected with filter box (13), the inside of filter box (13) is equipped with dust screen (18), the inside of pear-shaped splash guard (15) is equipped with multiple splash boards (17).

2. The oil leakage prevention device for a speed reducer according to claim 1, characterized by: The outside of S-shaped oil guide elbow (2) is evenly distributed with fin (9).

3. The oil leakage prevention device for a speed reducer according to claim 1, characterized by: The conical cover (1) is communicated with the inside of reducer, and the lower surface of the reducer housing is sealed and connected with the conical cover (1).

4. The oil leakage prevention device for a speed reducer according to claim 1, characterized by: The lower end of the front side of the cooling water tank (8) is provided with a drain pipe (7), and the drain valve (6) is installed on the drain pipe (7).

5. The oil leakage prevention device for a speed reducer according to claim 1, characterized by: The upper end of the backflow pipe (5) is provided with a sealing flange (3), and the sealing flange (3) is fixed on the reducer housing by bolts.

6. The oil leakage prevention device for a speed reducer according to claim 1, characterized by: The outside of the filter box (13) is provided with a gas pipe (14) with an opening downward.

7. The oil leakage prevention device for a speed reducer according to claim 1, characterized by: The splash boards (17) are staggered left and right in a stepped manner.

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