A device and method for sucking out oil stored in a steering gear vent hole

Abstract

The present invention belongs to the technical field of hydraulic equipment maintenance, and specifically relates to a device and method for sucking out oil stored in the vent hole of a steering gear, comprising an oil suction pipe, a guide wire, a hose, a one-way valve, a three-way joint, a syringe, and an oil collecting bottle; the oil suction pipe is composed of a capillary polytetrafluoroethylene tube and a first joint; the guide wire is composed of an elastic steel wire and a second joint; the elastic steel wire penetrates into the capillary polytetrafluoroethylene tube of the oil suction pipe, the first joint and the second joint are combined into one, the first joint is connected to the three-way joint through a hose, the other two joints of the three-way joint are respectively connected to the syringe and the oil collecting bottle through a hose, and a one-way valve is arranged between the first joint and the three-way joint. The device designed by the present invention and the corresponding implementation method can effectively suck out the oil stored in the vent hole of the hydraulic steering gear, and avoid the hydraulic oil from being discharged from the steering gear as the vent hole breathes in and out the air, which creates the illusion of oil leakage from the steering gear.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic equipment maintenance, and in particular relates to a device and method for sucking out oil stored in a steering gear vent hole. Background Art

[0002] Hydraulic servos are commonly used accessories for flight control systems in aerospace equipment. Some redundant servos are provided with vents on the casing. Due to internal leakage problems, a certain amount of hydraulic oil will accumulate in the space inside the vent after a period of use. When the servo is working, as the volume of the space inside the vent changes, the accumulated hydraulic oil will be discharged from the servo as the vent breathes in and out of the air, which will create the illusion of oil leakage in the servo. A method or device is needed to discharge or suck out the stored oil. The conventional solution is to operate the servo to discharge the stored oil through the vent's breathing in and out of the air when the servo is working. Because the vent is not connected to the bottom of the oil storage chamber, the stored oil cannot be completely drained. Another conventional solution is to insert a capillary polytetrafluoroethylene tube into the vent, such as Figure 1 As shown, the oil is sucked out, but the capillary polytetrafluoroethylene tube is too soft to be conveniently inserted into the vent hole, and it is also impossible to turn inside the vent hole and insert into the bottom of the oil storage cavity. Summary of the invention

[0003] The invention provides a steering gear vent oil suction device, which can effectively suck out the oil stored in the hydraulic steering gear vent, and prevent the hydraulic oil from being discharged from the steering gear along with the breathing of air by the vent, thereby preventing the false appearance of steering gear oil leakage.

[0004] Technical solution of the present invention: In order to achieve the above-mentioned purpose of the invention, on the one hand, the present invention proposes a steering gear vent oil storage and suction device, comprising an oil suction pipe, a guide steel wire, a hose, a one-way valve, a three-way joint, a syringe, and an oil collecting bottle; the oil suction pipe is composed of a capillary polytetrafluoroethylene tube and a first joint; the guide steel wire is composed of an elastic steel wire and a second joint; the elastic steel wire is inserted into the capillary polytetrafluoroethylene tube of the oil suction pipe, the first joint and the second joint are combined into one, the first joint is connected to the three-way joint through a hose, the other two joints of the three-way joint are respectively connected to the syringe and the oil collecting bottle through a hose, and a one-way valve is arranged between the first joint and the three-way joint.

[0005] Furthermore, a slot is provided on the first joint, and a boss is provided on the corresponding second joint; when the guide wire is inserted into the oil suction pipe, the boss of the second joint can slide in the slot provided on the first joint and be limited.

[0006] Furthermore, the slot is in a J shape, and a notch extends from the rear end to limit the boss.

[0007] Furthermore, the oil collecting bottle is composed of a bottle body, a bottle cap, and a sponge core, and the sponge core is arranged in the bottle body for storing oil.

[0008] Furthermore, a sponge pad is provided in the bottle cap of the oil collecting bottle, which is used to separate the exhausted air from the oil and gas and prevent the oil from flowing out of the oil collecting bottle when the oil collecting bottle is tipped over.

[0009] Furthermore, the bottle cap is provided with an oil hose connector and an air hole.

[0010] Furthermore, a one-way valve is provided between the oil collecting bottle and the three-way joint to prevent the sucked oil from flowing back and external air from entering the oil suction pipe.

[0011] Another aspect of the present invention further provides a method for sucking out oil stored in a steering gear vent hole, using the sucking out device designed as above, the method comprising the following steps:

[0012] The first step is to connect the one-way valve, the three-way joint and the syringe in sequence through a hose, and also connect the oil collecting bottle and the three-way joint through a hose;

[0013] Step 2: Insert the guide wire into the oil suction pipe. The boss on the guide wire joint slides into the groove on the oil suction pipe joint. After sliding to the bottom, rotate the guide wire clockwise until it stops rotating. Pull the guide wire backward until it stops pulling. At this time, the guide wire and the oil suction hose are relatively fixed.

[0014] Step 3: Extend the oil suction pipe inserted into the guide wire into the vent hole of the steering gear. Initially, under the constraint of the vent hole, the oil suction pipe and the guide wire are in a straight state; when extended to the bottom, the guide wire loses the constraint of the vent hole, and the head returns to the bent state, driving the oil suction pipe to bend toward the oil storage cavity; keep the guide wire still, pull back, rotate clockwise, and push forward the oil suction pipe in turn, until the oil suction pipe extends into the bottom of the oil storage cavity; keep the oil suction pipe still, and pull out the guide wire backwards;

[0015] Step 4. Connect the joint of the oil suction pipe to the one-way valve through a hose, then pull out the syringe. The oil in the servo oil storage chamber will be sucked into the syringe. Then push the syringe forward again. The oil sucked out of the syringe will be transferred to the oil collecting bottle and absorbed and stored by the sponge core in the oil collecting bottle.

[0016] Beneficial technical effects: The oil storage and suction device for the steering gear vent hole designed by the present invention fully combines the soft characteristics of the oil suction pipe and the resilience characteristics of the elastic steel wire. After the two are combined, the elastic steel wire can play a certain supporting role on the one hand, and more importantly, when the oil suction pipe is extended into the bottom of the steering gear vent hole, since there are two spaces in different directions between the vent hole and the oil storage chamber, the end of the elastic steel wire is just released from the constraint of the vent hole in this space, and the bending state is restored to drive the oil suction pipe to bend toward the oil storage chamber; continue to push the oil suction pipe, and the bent end of the elastic steel wire can just further guide the oil suction pipe to move toward the oil storage chamber until the oil suction pipe extends into the bottom of the oil storage chamber, so as to effectively overcome the problem that the traditional method of the oil suction pipe is difficult to fully extend into the bottom of the oil storage chamber. Finally, the elastic steel wire is pulled out to complete the suction of the residual oil in the oil storage chamber, effectively avoiding the long-term deposition of the oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the implementation of the conventional oil absorption method of the present invention;

[0018] Figure 2 This is a structural diagram of a steering gear vent oil storage and suction device of the present invention;

[0019] Figure 3 It is a structural diagram of an oil suction pipe in an oil storage and suction device of a steering gear vent hole of the present invention;

[0020] Figure 4 This is a structural diagram of a guide wire in a steering gear vent oil storage and suction device of the present invention;

[0021] Figure 5 It is a structural diagram of an oil collecting bottle in a steering gear vent oil storage and suction device of the present invention;

[0022] Figure 6 It is a schematic diagram of the operation of an oil suction pipe and a guide wire in an oil storage and suction device for a steering gear vent hole of the present invention;

[0023] Figure 7 It is a schematic diagram of the operation of an oil suction pipe and a guide wire in an oil storage and suction device for a steering gear vent hole of the present invention;

[0024] Figure 8 It is a schematic diagram of the oil suction operation of the oil storage and suction device of the steering gear vent hole of the present invention;

[0025] Fig. 9 The present invention is a schematic diagram of the operation of releasing and sucking out oil from a steering gear vent oil storage and suction device of the present invention.

[0026] The numbers in the accompanying drawings are: 1-oil suction pipe, 2-guide wire, 3-first hose, 4-second hose, 5-third hose, 6-fourth hose, 7-fifth hose, 8-first one-way valve, 9-second one-way valve, 10-three-way joint, 11-syringe, 12-oil collecting bottle, 13-capillary polytetrafluoroethylene tube, 14-first joint, 15-elastic steel wire, 16-second joint, 17-boss, 18-bottle body, 19-bottle cap, 20-sponge core, 21-sponge pad, 22-oil hose, 23-air hole. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] Example 1

[0029] The present invention provides a steering gear vent oil storage and suction device, such as Figure 2-5 As shown, an oil suction pipe 1, a guide steel wire 2, a first hose 3, a second hose 4, a third hose 5, a fourth hose 6, a fifth hose 7, a first one-way valve 8, a second one-way valve 9, a three-way joint 10, a syringe 11, and an oil collecting bottle 12; the oil suction pipe is composed of a capillary polytetrafluoroethylene tube 13 and a first joint 14, and the first joint 14 is provided with a card slot; the guide steel wire is composed of an elastic steel wire 15 and a second joint 16, and a boss 17 is provided on the second joint 17 matching the first joint 14; the oil collecting bottle is composed of a bottle body 18, a bottle cap 19, a sponge core 20, and a sponge pad 21, and the bottle cap 19 is provided with an oil hose 22 and an air hole 23;

[0030] During the design, the guide wire 2 can be inserted into the oil suction pipe 1, and the boss 18 on the guide wire 2 can slide and be limited in the groove 14a set in the first joint 14 of the oil suction pipe 1; in a specific case that can be implemented, the groove 14a can adopt a J-shaped structure with a small extended notch at the tail end. When the boss 18 slides along the J-shaped groove to the notch at the tail end, the two are fixed as one.

[0031] Considering the field application, in the oil collecting bottle 18, the sponge core 20 is arranged in the bottle body 18 for storing oil. A sponge pad 21 is also arranged in the bottle cap 19 of the oil collecting bottle for separating the exhausted air from oil and gas and preventing the oil from flowing out of the oil collecting bottle when the oil collecting bottle is tipped over.

[0032] The bottle cap 19 is provided with an oil hose connector 22 and an air hole 23. A second one-way valve 9 is provided between the oil collecting bottle 18 and the three-way connector 10 to prevent the sucked oil from flowing back and external air from entering the oil suction pipe.

[0033] The specific steps of implementing oil absorption of the present invention are as follows:

[0034] First, assemble the first hose 3, the second hose 4, the third hose 5, the fourth hose 6, the fifth hose 7, the first one-way valve 8, the second one-way valve 9, the three-way connector 10, the syringe 11, and the oil collecting bottle 12 for use.

[0035] like Figure 6 As shown, insert the guide wire into the oil suction pipe, and the boss on the guide wire joint slides into the groove on the oil suction pipe joint. After sliding to the bottom, rotate the guide wire clockwise until it cannot rotate anymore, and pull the guide wire backwards until it cannot be pulled anymore. At this time, the guide wire and the oil suction hose are relatively fixed.

[0036] like Figure 7 As shown, the oil suction pipe and guide wire fixed together are extended into the air vent of the steering gear. Initially, under the constraint of the air vent, the oil suction pipe and the guide wire are stretched straight; when extended to the bottom, the guide wire loses the constraint of the air vent, and the head of the guide wire resumes bending, driving the oil suction pipe to bend toward the oil storage chamber; keeping the guide wire stationary, pull the oil suction pipe backward, rotate it clockwise, and push it forward in turn until the oil suction pipe extends into the bottom of the oil storage chamber; keeping the oil suction pipe stationary, pull out the guide wire backward.

[0037] like Figure 8 , Fig. 9 As shown, connect the hose to the oil suction joint, pull out the syringe, and the oil in the steering gear oil storage chamber is sucked into the syringe. Push the syringe forward, and the oil sucked out of the syringe is transferred to the oil collecting bottle and absorbed by the sponge in the oil collecting bottle and stored in the oil collecting bottle. A sponge pad can also be designed in the bottle cap to separate the exhausted air from the oil and prevent the oil from flowing out of the oil collecting bottle when the oil collecting bottle is tipped over.

[0038] By adopting the device designed as above and the corresponding implementation method of the present invention, the oil stored in the vent hole of the hydraulic steering gear can be effectively sucked out, so as to prevent the hydraulic oil from being discharged from the steering gear along with the breathing of air by the vent hole, thereby causing the illusion of oil leakage in the steering gear.

[0039] The above specific implementation methods or cases are only used to explain the technical solutions of the present invention, and are not intended to limit the present application. Any parts not described in detail are deemed to be conventional technical means or common knowledge in the field. It can be understood by ordinary technicians in this field that: based on the design concept of the present application, the technical solutions recorded in the aforementioned implementation methods should be adaptively modified, or some or all of the technical features therein should be replaced by equivalents. These modifications, equivalent replacements, and adaptively improved technical solutions do not depart from the technical essence of the present invention and should all be covered within the protection scope of the present application.

Claims

1. A steering gear vent oil suction device, characterized in that: It comprises an oil suction pipe, a guide steel wire, a hose, a one-way valve, a three-way joint, a syringe and an oil collecting bottle; the oil suction pipe is composed of a capillary polytetrafluoroethylene tube and a first joint; the guide steel wire is composed of an elastic steel wire and a second joint; the elastic steel wire penetrates into the capillary polytetrafluoroethylene tube of the oil suction pipe, the first joint and the second joint are combined into one, the first joint is connected to the three-way joint through a hose, the other two joints of the three-way joint are respectively connected to the syringe and the oil collecting bottle through a hose, and a one-way valve is arranged between the first joint and the three-way joint.

2. The oil storage and suction device for the steering gear vent hole according to claim 1, characterized in that: The first joint is provided with a slot, and the corresponding second joint is provided with a boss; when the guide wire is inserted into the oil suction pipe, the boss of the second joint can slide in the slot provided in the first joint and be limited.

3. The oil storage and suction device for the steering gear vent hole according to claim 2, characterized in that: The slot is in a J shape, and a notch extends from the rear end to limit the boss.

4. The oil storage and suction device for the steering gear vent hole according to claim 1, characterized in that: The oil collecting bottle is composed of a bottle body, a bottle cap and a sponge core. The sponge core is arranged in the bottle body and is used for storing oil.

5. The oil storage and suction device for the steering gear vent hole according to claim 4, characterized in that: A sponge pad is also arranged in the bottle cap of the oil collecting bottle, which is used to separate the exhausted air from oil and gas and prevent the oil from flowing out of the oil collecting bottle when the oil collecting bottle is tipped over.

6. The oil storage and suction device for the steering gear vent hole according to claim 5, characterized in that: The bottle cap is provided with an oil hose connector and an air hole.

7. The oil storage and suction device for the steering gear vent hole according to claim 1, characterized in that: A one-way valve is provided between the oil collecting bottle and the three-way joint to prevent the sucked oil from flowing back and external air from entering the oil suction pipe.

8. A method for sucking out oil from a steering gear vent hole, using the sucking out device as claimed in any one of claims 1 to 7, characterized in that: The method comprises the following steps: The first step is to connect the one-way valve, the three-way joint and the syringe in sequence through a hose, and also connect the oil collecting bottle and the three-way joint through a hose; Step 2: Insert the guide wire into the oil suction pipe. The boss on the guide wire joint slides into the groove on the oil suction pipe joint. After sliding to the bottom, rotate the guide wire clockwise until it stops rotating. Pull the guide wire backward until it stops pulling. At this time, the guide wire and the oil suction hose are relatively fixed. Step 3: Extend the oil suction pipe inserted into the guide wire into the vent hole of the steering gear. Initially, under the constraint of the vent hole, the oil suction pipe and the guide wire are in a straight state; when extended to the bottom, the guide wire loses the constraint of the vent hole, and the head returns to the bent state, driving the oil suction pipe to bend toward the oil storage cavity; keep the guide wire still, pull back, rotate clockwise, and push forward the oil suction pipe in turn, until the oil suction pipe extends into the bottom of the oil storage cavity; keep the oil suction pipe still, and pull out the guide wire backwards; Step 4. Connect the joint of the oil suction pipe to the one-way valve through a hose, then pull out the syringe. The oil in the servo oil storage chamber will be sucked into the syringe. Then push the syringe forward again. The oil sucked out of the syringe will be transferred to the oil collecting bottle and absorbed and stored by the sponge core in the oil collecting bottle.

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