CN204025613U - For keeping the device of pressure in gearbox - Google Patents

Abstract

The utility model relates to a kind of for keeping the device (1) of pressure in gearbox (2), this device comprises expansion tank (6) and pipeline (3), and this pipeline flows through being tightly connected of pipeline (3) for generation of between the inner chamber of gearbox (2) and expansion tank (6).

Description

For keeping the device of pressure in gearbox

Technical field

The utility model relates to a kind of for keeping the device of gearbox internal pressure and a kind of gearbox with such device.

Background technique

The loss heat of gearbox can cause the temperature oscillation in gear box casing.Caused the change of the volume of gear box casing in-lubricant and air by temperature oscillation and then cause the change of the internal pressure in gear box casing.For locking system, above-mentioned situation may cause the damage of uncontrollable pressure increase and gearbox or oiling agent to spill from gear box casing.Therefore pressure difference between housing cavity and casing surroundings environment is just balanced.

For such gearbox, namely when it operates, the direction of its lubricant level its transmission shaft relative remains unchanged, the exhaust of rising for stoping excessive pressure is realized by outlet valve with mode and method simply, and this outlet valve is disposed on gear box casing and is being positioned at the position on lubricant level.On the contrary, gearbox occur to swing or even 360 degree rotations time, this valve just can not employ, because due to the change in location of gearbox, valve may be under lubricant level and therefore oiling agent may spill from gear box casing.

In patent documentation DD 254 235 A1, describe a kind of for gearbox exhaust and the device of supplying gas, this device has very large rotation or oscillating position change, such as, in the steering transmission linkage that can occur in industrial robot or off-road vehicle.Described in this, device has following characteristics, on jack shaft, namely arrange a narrow axial exhaust port, and this exhaust port is provided with venting gas appliance that is known, that stop oil spout and oil spray being positioned in the outlet in the middle of gearbox.The shortcoming of this exhaust scheme is need the machining of transmission shaft.This can make cost intensive and can the allowable torque load of restrictive axes.

Model utility content

The purpose of this utility model is, the pressure improved in gearbox keeps.

According to the utility model, above-mentioned purpose is realized by a kind of device with given feature in claim 1.

The device that the utility model is correlated with is for keeping the pressure in gearbox.This device comprises an expansion tank.This expansion tank can be set to film expansion case or piston type storage device.In addition this device also comprises pipeline, and this pipeline flows through being tightly connected of pipeline for generation of between the inner chamber of gearbox and expansion tank.

Term " pipeline " both comprised flexible hose, and such as plastics or rubber hose, also comprise rigid pipe, such as metal or plastic tube.

Expansion tank, also referred to as extension box or pressure balance container, is the component in hydraulic system, and this expansion tank receives the Volume Changes of the hydraulic fluid between minimum and maximum temperature and can keep constant pressure as much as possible.Pressure keeps the constant pressure that is referred to as to keep as much as possible by this in locking system.The utility model with following knowledge for foundation, namely with in the known hydraulic system used in water central heating in expansion tank the same, be also applicable to the pressure balance of gearbox.Can guarantee like this, transmission internal can not form unallowed overvoltage, and this kind of unallowed overvoltage can cause gearbox damage and oiling agent to spill from gearbox.

Based on the mechanical solution of low cost, the utility model provides a kind of method reliably keeping having the gearbox internal pressure of very large hunting range or rotation, and such as it may be used for winding machine.The utility model has expanded the application of speed-variable motor, such as field operation, device fabrication, the traffic tool, underwater installation and immersion wet pit.

Preferred structure scheme of the present utility model and improvement project provide in the following claims.

According to a kind of preferred structure scheme of the present utility model, pipeline has on the opening for being connected to gear box casing, the airtight connection device that can seal at first end place and has on the opening for being connected to piston type storage device, the airtight connection device that can seal at the second end place.

According to a kind of preferred structure scheme of the present utility model, device comprises the fixed equipment be assembled to for handle assembly on the outer side surface of gear box casing.Such as described device can be screwed on the flange of gear box casing.The advantage that fixed equipment has is, gearbox and air exhausting device can be configured to system unit, this simplify assembling and protects with damage.

According to a kind of preferred structure scheme of the present utility model, between two ends of pipeline, there is safety valve.When there is pressure increase extremely, gearbox can be therefore protected and be not damaged.

Another kind of preferred structure scheme of the present utility model is, there is the gearbox of the said equipment, wherein, the opening that pipeline utilizes first end to be connected in gear box casing utilizes the second end to be connected on the opening of expansion tank, therefore there is the air tight communication flowing through pipeline between gearbox inner chamber and expansion tank.Gearbox can be the application gearbox of a kind of industrial gearbox or any one form, such as planetary transmission, cylindrical gears speed changer or worm gear and endless screw speed changer.

Above-described gearbox be preferably applied in such device, gearbox runs under water or runs under water momently in the apparatus.Ventilation plant conventional in this case has defect, because may there is water to enter the danger that gearbox or oil flows out from gearbox.This kind of application can be the traffic tool or underwater installation.

Accompanying drawing explanation

By accompanying drawing, the utility model is set forth below by multiple embodiment.Accompanying drawing schematically and respectively illustrate not according to actual proportions

Fig. 1 is the gearbox with pressurizer;

Fig. 2 is the embodiment of pressurizer in speed-variable motor;

Fig. 3 and 4 is the application of the pressurizer in wire twisting equipment.

Embodiment

Fig. 1 illustrates in the gearbox 2 utilizing bath lubrication to operate for keeping the device 1 of pressure.The output of gearbox 2 and the axis A of live axle 16 have horizontal alignment.Device 1 comprises an expansion tank 6 existed with piston type storage device and pipeline 3 form.

Pipeline 3 has coupling in the end 31 of its gear-box side, such as hose coupling, and pipeline is connected on corresponding flange by this coupling airtightly, and this flange is disposed on the opening 23 in gearbox 2 housing 21.Pipeline 3 has coupling, such as hose coupling in the end 32 of its side of gearbox 2 dorsad, and pipeline is connected on corresponding flange by this coupling airtightly, and this flange is disposed on the opening of expansion tank 6.Can carry out flowing through the dielectric gas of pipeline 3 and the exchange of oiling agent between the first end 31 of pipeline 3 and the second end 32 of pipeline 3.

By being configured in the opening 23 in gearbox 2 housing 21, between the second end 32 of pipeline 3 and the inside of gearbox 2, there is connection.The possibility of fluid communication is present in undoubtedly between the inside of such gearbox 2 and the inside of expansion tank 6.In the category of this specification, this " fluid " concept had both comprised gas and had also comprised liquid, such as air and lubricant oil.

Inner chamber, the expansion tank 6 of gearbox 2 and the pipeline 3 that gearbox inner chamber and expansion tank 6 couple together airtightly is formed locking system.The oiling agent comprised in on-stream heating gearbox 2 inner chamber, be preferably a kind of lubricant oil, oiling agent expand and via pipeline 3 pairs of expansion tanks 6 inside apply pressure.The pressure medium compression simultaneously comprised in expansion tank 6, pressure medium is preferably gas, as nitrogen.The part volume exceeding gearbox of oiling agent, will be inflated case 6 and receive; Limited in the pressure increase of transmission internal thus.

Piston type storage device 6 is the hydropneumatic storage devices with free-moving piston, and this piston is as resolution element between air cushion and oiling agent.Piston type storage device 6 is made up of cylindrical jacket, and this cylindrical jacket has the lid of gas and the hydraulic fluid side screwed and the piston with seal ring usually.Mounting point can unrestricted choice.The volume of piston type storage device 6 and the volume of gearbox inner chamber match with the Volume Changes occurred.

Fig. 2 illustrates an embodiment of pressurizer 1, and this pressurizer is disposed in and comprises on the gearbox motor of gearbox 2 and motor 50.The live axle of gearbox 2 can be driven by motor 50, and this motor passes through motor bracket (Motorlaterne) 17 Flange joint on gearbox 2.The sidewall of gear box casing 21 is arranged and is used for oiling agent inlet 52, in particular for gear box oil, with for monitoring the pressure gauge 51 of pressure in gear box casing.Described pressurizer 1 comprises expansion tank 6 and the flexible pipe 3 of hydraulic pressure-piston storage device form.Expansion tank 6 is permanently connected by the housing 21 of fixed equipment 9 with gearbox 2.Fixed equipment 9 comprises metal arc, and the long limit of this metal arc is screwed on gear box casing 21 and its minor face is tightened on the front of expansion tank 6.

The hole of gearbox 21 has airtight being communicated with by the flexible pipe 3 of sealing with the hole in expansion tank 6, thus make to there is being tightly connected between the inside of gear box casing 21 and the inside of expansion tank 6, be tightly connected via this, the exchange of air and gear box oil can occur between gear box casing 21 and expansion tank 6.In order to keep pressure, gearbox 2 is equipped with airtight Simmer ring.The precompressed of expansion tank 6 is simultaneously less than the maintenance pressure of Simmer ring.

Pressure switch 10 is arranged on the arm of pipeline 3 as additional security measure, the pressure in this pressure switch supervisory system; When exceeding default threshold value, when being also the system pressure of maximum permission, motor 50 is just switched off.

The arm being furnished with pressure switch 10 additionally comprises oil drain out 11, and liquid oiling agent is discharged by this oil drain out or is reinjected in gearbox from gearbox.

Fig. 3 and 4 illustrates the application possible in the gearbox 2 rotated of this type of pressurizer, and this gearbox is used in a kind of wire twisting equipment.Multiple electric wires 63 helically be wrapped on coil 60 accumulates cable and extracts out from wire twisting equipment along direction of traction 64.

On ring track 40, four coil supporters 61 on cage (Korb) 62 are furnished with around central axis A in the biased mode of 90 degree.Motor 50 is comprised by each speed-variable motor 2,50(be positioned on cage 62) coil brace 61 and its wire coil 60 hung above and the speed changer that can be driven by motor are rotated.When gearbox 2 runs, the pressure increase of the gear box casing inside produced mainly due to frictional heat stop by above-mentioned pressurizer.

Due to operationally, the cage 62 of wire twisting equipment is rotated round central axis A by main drive 20, and speed-variable motor 2,50 carries out 360 degree of rotations together with its gearbox 2 thus, therefore passes through completely grease proofing and airtight (mist of oil! ) the less desirable leakage that prevents oiling agent from occurring from gearbox 2 environment towards periphery of sealed-in lubricant system.

Although further described details of the present utility model by preferred embodiment, the utility model is not by the restriction of disclosed example, and under the prerequisite not departing from protection domain of the present utility model, those skilled in the art can derive other variants.

Claims (10)

1. the device (1) for maintenance pressure in gearbox (2), comprise expansion tank (6) and pipeline (3), described pipeline produces the airtight connection flowing through described pipeline (3) between the inner chamber of described gearbox (2) and described expansion tank (6).

2. device according to claim 1 (1), wherein, described expansion tank (6) is film expansion case or piston type storage device.

3. device according to claim 1 and 2 (1), wherein, described device (1) comprises fixed equipment (9), and described fixed equipment is used for making described device (1) be assembled to the outer side surface (22) of gear box casing (21).

4. device according to claim 1 and 2 (1), wherein, described device (1) has safety valve (15) or pressure switch (10).

5. device according to claim 4 (1), wherein, described pipeline (3) has safety valve (15) or pressure switch (10) between two end (31,32).

6. device according to claim 3 (1), wherein, described device (1) has safety valve (15) or pressure switch (10).

7. device according to claim 6 (1), wherein, described pipeline (3) has safety valve (15) or pressure switch (10) between two end (31,32).

8. one kind has the gearbox (2) of device according to any one of claim 1 to 7 (1), wherein said pipeline (3) utilizes first end (31) to be connected to the perforate in gear box casing and utilizes the second end (32) to be connected to the perforate of described expansion tank (6), thus produces flow through being tightly connected of described pipeline (3) between the inner chamber and described expansion tank (6) of described gearbox (2).

9. gearbox according to claim 8 (2) application in a kind of equipment, when described equipment runs, there is vibration or rotate or be positioned under water in described gearbox (2).

10. application according to claim 9, wherein said equipment is wire twisting equipment.