Active trace oil supply device

Abstract

The utility model discloses an active trace oil supply device which comprises a shell, a spring, a corrugated pipe, a piezoelectric pump and a power supply mechanism, the shell is of a cylindrical structure, the spring is arranged at the bottom of the shell, the corrugated pipe is arranged in the shell, the rear end of the corrugated pipe abuts against the spring and compresses the spring, the piezoelectric pump is arranged in the shell, and the power supply mechanism is arranged in the shell. The piezoelectric pump is located in front of the corrugated pipe, the first guide pipe is used for connecting the corrugated pipe with an oil inlet of the piezoelectric pump, the second guide pipe is arranged at the front end of the shell in a penetrating mode and connected with an oil outlet of the piezoelectric pump, and the power supply mechanism is electrically connected with the piezoelectric pump. According to the oil supply device, power is supplied to the piezoelectric pump through the power supply mechanism, and the cavity in the piezoelectric pump is periodically enlarged and shrunk, so that lubricating oil enters the piezoelectric pump from the corrugated pipe and further flows out of the piezoelectric pump. Meanwhile, the spring can compress the corrugated pipe, so that the lubricating oil in the corrugated pipe is always located at the front end in the corrugated pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of space lubrication, and particularly relates to an active micro oil supply device. BACKGROUND

[0002] Satellite platforms with long service life and high reliability are increasingly demanded by China's space strategy, and the momentum flywheel in the satellite platform is an important component of the space actuator.

[0003] At present, due to the lubrication technical bottleneck of bearing assemblies under space conditions, the bearing assemblies in long-term service often have problems such as decreased friction performance and unstable friction torque after the lubrication state deteriorates, so that the design life of the momentum flywheel still has a gap from meeting the long-life requirements of satellites.

[0004] In actual application, the space spacecraft needs to be lubricated regularly and quantitatively during work, and the amount of lubricating oil provided each time cannot be too much, otherwise the excess lubricating oil will volatilize and pollute the mirror surface of the optical instrument. At the same time, since the launch cost of the spacecraft is very sensitive to the weight of the spacecraft, the lubricating oil carried should be as little as possible, and in principle should just meet the lubrication requirements of the spacecraft within the working life.

[0005] In the prior art, the current method of micro oil supply for space shafting in China is to pre-store lubricating oil in a porous retainer or an additional oil storage device, and continuously release the lubricating oil under the action of centrifugal force or surface tension, so as to realize bearing lubrication.

[0006] However, the device has the following disadvantages: a certain cumulative running time is required before supplying oil to the bearing, and during this period, the oil supply to the bearing needs to be ensured by the oil in the raceway and the retainer, so that the bearing is prone to oil shortage after a period of time. Moreover, the existing space oil supply equipment has a complex structure and a large size, which is very unfavorable for space spacecraft and will occupy too much space. UTILITY MODEL CONTENTS

[0007] The utility model aims to provide an active micro oil supply device to solve the problems of complex structure, large size and imperfect oil supply of the prior art.

[0008] Therefore, one embodiment of the utility model provides an active micro oil supply device.

[0009] According to the embodiment of the utility model, the oil supply device comprises a shell, the shell is a cylindrical structure, a spring is arranged at the bottom of the shell, a bellows is arranged in the shell, the rear end of the bellows abuts against the spring and compresses the spring, a piezoelectric pump is arranged in the shell and located in front of the bellows, a first conduit is used for connecting the bellows and the oil inlet of the piezoelectric pump, a second conduit is arranged on the front end of the shell, the second conduit is connected with the oil outlet of the piezoelectric pump, and a power supply mechanism is electrically connected with the piezoelectric pump.

[0010] According to the utility model, the piezoelectric pump, the bellows and the spring are sequentially arranged in the shell, the first conduit is used for connecting the bellows and the oil inlet of the piezoelectric pump, the second conduit is arranged on the front end of the shell, and the second conduit is connected with the oil outlet of the piezoelectric pump.The power supply mechanism is used for supplying power to the piezoelectric pump, the piezoelectric vibrator in the piezoelectric pump is periodically deformed, the brass sheet on the piezoelectric vibrator is also periodically deformed, the internal cavity of the piezoelectric pump is periodically enlarged and reduced, so that the lubricating oil in the bellows enters the piezoelectric pump and further flows out of the piezoelectric pump.Meanwhile, when the lubricating oil in the bellows is reduced, the spring can compress the bellows, so that the lubricating oil in the bellows is always located at the front end of the bellows.

[0011] In some embodiments, the active trace oil supply device further comprises a first mounting seat, the first mounting seat is slidably arranged at the bottom of the shell, and the first mounting seat is located between the rear end of the bellows and the spring.

[0012] In some embodiments, the front end of the first mounting seat is provided with a protruding column, the rear end of the bellows is provided with a first accommodating cavity, the first accommodating cavity is cylindrical, and the protruding column is adapted to be inserted into the first accommodating cavity.

[0013] In some embodiments, the rear end of the first mounting seat is provided with a second accommodating cavity, the second accommodating cavity is cylindrical, and the top of the second accommodating cavity is connected with the front end of the spring.

[0014] In some embodiments, the active trace oil supply device further comprises a sealing ring, the sealing ring is sleeved on the protruding column, and the sealing ring is located between the rear end of the bellows and the front end of the first mounting seat.

[0015] In some embodiments, the active micro oil supply device further comprises a rear shell cover, the rear end of the shell is an open structure, the rear shell cover is arranged on the rear end of the shell, and the front end of the rear shell cover extends into the shell, the front end of the rear shell cover is provided with a third accommodating cavity, the third accommodating cavity is cylindrical, and the rear end of the spring is adapted to be inserted into the third accommodating cavity.

[0016] In some embodiments, the active micro oil supply device further comprises a second mounting seat, the second mounting seat is arranged in the shell, and the second mounting seat is located at the top of the shell, the second mounting seat is in abutment with the front end of the bellows, and the piezoelectric pump is mounted on the second mounting seat.

[0017] In some embodiments, the active micro oil supply device further comprises a pump pressing cover, the pump pressing cover is arranged on the second mounting seat, and the pump pressing cover is used for pressing the piezoelectric pump.

[0018] In some embodiments, the active micro oil supply device further comprises two one-way valves, the two one-way valves are respectively arranged on the oil inlet and the oil outlet of the piezoelectric pump.

[0019] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, but not limiting the present disclosure. Other features and aspects of the present disclosure will become more apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0021] Figure 1 is a schematic view of an oil supply device according to an embodiment of the present application.

[0022] Figure 2 is a schematic view of an oil supply device according to an embodiment of the present application.

[0023] Figure 3 is a schematic view of an oil supply device according to an embodiment of the present application.

[0024] Figure 4 is a schematic view of an oil supply device according to an embodiment of the present application.

[0025] LIST OF REFERENCE NUMERALS:

[0026] Active micro-oil supply device 100, housing 101, rear cover 102, third accommodating chamber 103, spring 10, bellows 20, first accommodating chamber 21, piezoelectric pump 30, first conduit 31, second conduit 32, first mounting seat 40, raised column 41, second accommodating chamber 42, sealing ring 50, second mounting seat 60, pump pressure cover 61. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions of the present invention in conjunction with specific implementation schemes. However, those skilled in the art should understand that the implementation schemes described below are only used to illustrate the present invention and should not be considered as limiting the scope of the present invention. Based on the implementation schemes in the present invention, all other implementation schemes obtained by those of ordinary skill in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] like Figures 1-4 As shown, the active micro-oil supply device 100 according to an embodiment of the present invention includes a housing 101, a spring 10, a bellows 20, a piezoelectric pump 30, a first conduit 31, a second conduit 32 and a power supply mechanism (not shown).

[0029] The housing 101 is a cylindrical structure. The spring 10 is arranged at the bottom of the housing 101 . The bellows 20 is arranged in the housing 101 . The rear end of the bellows 20 abuts against the spring 10 and compresses the spring 10 .

[0030] The piezoelectric pump 30 is arranged in the shell 101, and the piezoelectric pump 30 is located in front of the bellows 20. The first conduit 31 is used to connect the bellows 20 and the oil inlet of the piezoelectric pump 30. The second conduit 32 is passed through the front end of the shell 101. The second conduit 32 is connected to the oil outlet of the piezoelectric pump 30, and the power supply mechanism is electrically connected to the piezoelectric pump 30.

[0031] It should be noted that the model of the piezoelectric pump 30 is XZ-07. The working principle of the XZ-07 piezoelectric pump is the inverse piezoelectric effect of piezoelectric ceramics. When alternating current is applied to the piezoelectric ceramics, the piezoelectric vibrator at the bottom of the piezoelectric pump undergoes periodic deformation, which in turn causes the brass sheet on the piezoelectric vibrator to undergo periodic deformation. The internal chamber of the piezoelectric pump also expands and contracts periodically, causing the lubricating oil to flow out of the piezoelectric pump. The inlet and outlet of the piezoelectric pump are also equipped with one-way valves to prevent the lubricating oil from flowing back. The volume of the piezoelectric pump is only 7mm*7mm*0.75mm, which makes it possible to miniaturize the entire device. The deformation of the piezoelectric vibrator is very small, which provides a basis for the device to supply oil in a small amount and accurately.

[0032] According to the active micro oil supply device 100, the piezoelectric pump 30, the bellows 20 and the spring 10 are sequentially arranged in the shell 101, the first conduit 31 is connected between the bellows 20 and the oil inlet of the piezoelectric pump 30, the second conduit 32 is arranged on the front end of the shell 101, and the second conduit 32 is connected with the oil outlet of the piezoelectric pump 30. The piezoelectric pump 30 is powered by the power supply mechanism, the piezoelectric vibrator in the piezoelectric pump 30 is periodically deformed, the brass sheet on the piezoelectric vibrator is also periodically deformed, and the internal cavity of the piezoelectric pump 30 is periodically enlarged and reduced, so that the lubricating oil in the bellows 20 enters the piezoelectric pump 30 and further flows out of the piezoelectric pump 30. At the same time, after the lubricating oil in the bellows 20 is reduced, the spring 10 can compress the bellows 20, so that the lubricating oil in the bellows 20 is always located at the front end of the bellows 20.

[0033] Further, the front end of the bellows 20 is welded in the shell 101, so that the relative position of the bellows 20 is fixed, the front end of the bellows 20 cannot extrude the piezoelectric pump 30, and the stability and safety of the active micro oil supply device 100 are improved.

[0034] In some embodiments, as shown in Figures 2-4 the active micro oil supply device 100 further comprises a first mounting seat 40, the first mounting seat 40 is slidably arranged at the bottom of the shell 101, and the first mounting seat 40 is located between the rear end of the bellows 20 and the spring 10.

[0035] It can be understood that by arranging the first mounting seat 40, the uniformity and stability of the force acting on the rear end of the bellows 20 are effectively improved, and the compression process of the bellows 20 is more stable.

[0036] In some embodiments, the front end of the first mounting seat 40 is provided with a protruding column 41, the rear end of the bellows 20 is provided with a first accommodating cavity 21, the first accommodating cavity 21 is cylindrical, and the protruding column 41 is adapted to be inserted into the first accommodating cavity 21.

[0037] In some embodiments, as shown in Figures 2-4 the rear end of the first mounting seat 40 is provided with a second accommodating cavity 42, the second accommodating cavity 42 is cylindrical, and the top of the second accommodating cavity 42 is connected with the front end of the spring 10.

[0038] It can be understood that the second accommodating cavity 42 has a guiding function, and after the spring 10 enters the second accommodating cavity 42, the spring 10 can be compressed and elongated in the axial direction without deviation.

[0039] In some embodiments, as shown in Figures 2-4As shown, the active micro oil supply device 100 further comprises a sealing ring 50, which is sleeved on the protruding column 41 and located between the rear end of the bellows 20 and the front end of the first mounting seat 40.

[0040] In some embodiments, as shown, Figures 1-4 As shown, the active micro oil supply device 100 further comprises a rear shell cover 102, the rear end of the shell 101 is an open structure, the rear shell cover 102 is arranged on the rear end of the shell 101, and the front end of the rear shell cover 102 extends into the shell 101, the front end of the rear shell cover 102 is provided with a third accommodating cavity 103, the third accommodating cavity 103 is cylindrical, and the rear end of the spring 10 is adapted to be inserted into the third accommodating cavity 103.

[0041] In some embodiments, the active micro oil supply device 100 further comprises a second mounting seat 60, which is arranged in the shell 101 and located at the top of the shell 101, and the second mounting seat 60 abuts against the front end of the bellows 20, and the piezoelectric pump 30 is mounted on the second mounting seat 60.

[0042] It should be noted that the front end of the bellows 20 is designed as a hollow structure for lightweight design, and two grooves are left, the second mounting seat 60 can be placed at the front end of the bellows 20 through the grooves, and after the position is adjusted, it is fixed by welding, the upper end of the second mounting seat 60 is left with a groove, and the piezoelectric pump 30 is fixed on the second mounting seat 60 through the groove, the pump cover 5 is placed on the upper surface of the piezoelectric pump 30, and after the position of the oil inlet and outlet is adjusted, it is bonded with aviation glue. The front end of the bellows 20 is also provided with a through hole, so that the hydraulic oil in the bellows 20 can flow into the piezoelectric pump 30 and finally flow out from the outlet of the piezoelectric pump 30.

[0043] In some embodiments, the active micro oil supply device 100 further comprises a pump pressure cover 61, which is arranged on the second mounting seat 60 and used to press the piezoelectric pump 30.

[0044] In some embodiments, the active micro oil supply device 100 further comprises two one-way valves (not shown), which are respectively arranged on the oil inlet and outlet of the piezoelectric pump 30.

[0045] It should be noted that the oil inlet and outlet of the piezoelectric pump 30 are respectively provided with one-way valves, so that the lubricating oil entering the piezoelectric pump 30 cannot flow back into the bellows 20, and the lubricating oil of the oil outlet of the piezoelectric pump 30 can flow out, thereby ensuring the oil supply amount and accuracy of the device.

[0046] In summary, the utility model discloses active type trace oil supply device based on inverse piezoelectric effect in space differs from prior art, the utility model discloses active type trace oil supply device based on inverse piezoelectric effect in space is through setting up welding type bellows in the shell interior to store lubricating oil, and the rear portion of bellows is provided with first mounting seat and spring.When the oil liquid in bellows flows out, the compression spring will push the bellows, and the bellows is compressed, so that the remaining oil liquid in the bellows always maintains a certain pressure, guaranteeing that the oil liquid can flow into the oil inlet of piezoelectric pump.The device adopts piezoelectric pump based on the inverse piezoelectric effect principle of piezoelectric ceramic to work as a flow restrictor, and the piezoelectric pump can realize trace, intermittent pulse type controllable oil supply quantity.In addition, the utility model discloses active type trace oil supply device based on inverse piezoelectric effect in space has simple structure, small size, and the overall appearance is cylindrical, and the diameter is only 25mm, so that the device can be conveniently installed in the compact space of space aircraft.

[0047] In one specific embodiment, the input frequency is 30Hz 10V square wave alternating voltage, and the oil supply time is ten minutes, and the average value of the oil supply amount of multiple experiments is 1.91mg, so that the oil supply amount of the device is 0.191mg / min, which meets the requirement of trace oil supply of the device.

[0048] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, and therefore cannot be understood as a limitation on the utility model.

[0049] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one feature. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0050] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0051] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0052] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0053] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An active micro oil supply device characterized by comprising: The utility model relates to a kind of active micro oil supply device, including: Shell, the shell is cylindrical structure; Spring, the spring is arranged at the bottom of the shell; Bellows, the bellows is arranged in the shell, the rear end of the bellows is in abutment with the spring and compresses the spring; Piezoelectric pump, the piezoelectric pump is arranged in the shell, and the piezoelectric pump is located in front of the bellows; First conduit, the first conduit is used to connect the bellows with the oil inlet of the piezoelectric pump; Second conduit, the second conduit is arranged on the front end of the shell, and the second conduit is connected with the oil outlet of the piezoelectric pump; Power supply mechanism, the power supply mechanism is electrically connected with the piezoelectric pump.

2. The active micro oil supply device according to claim 1, wherein Further including: First mounting seat, the first mounting seat is slidably arranged at the bottom of the shell, and the first mounting seat is located between the rear end of the bellows and the spring.

3. The active micro oil supply device according to claim 2, wherein The front end of the first mounting seat is provided with a protruding column, the rear end of the bellows is provided with a first accommodating cavity, the first accommodating cavity is cylindrical, and the protruding column is adapted to be inserted into the first accommodating cavity.

4. The active micro oil supply device according to claim 3, wherein The rear end of the first mounting seat is provided with a second accommodating cavity, the second accommodating cavity is cylindrical, and the top of the second accommodating cavity is connected with the front end of the spring.

5. The active micro oil feeder according to claim 4, wherein Further including: Sealing ring, the sealing ring is sleeved on the protruding column, and the sealing ring is located between the rear end of the bellows and the front end of the first mounting seat.

6. The active micro-ingredient oil supply device according to claim 1, wherein Further including: Rear shell cover, the rear end of the shell is an open structure, the rear shell cover is arranged on the rear end of the shell, the front end of the rear shell cover extends into the shell, the front end of the rear shell cover is provided with a third accommodating cavity, the third accommodating cavity is cylindrical, and the rear end of the spring is adapted to be inserted into the third accommodating cavity.

7. The active micro-ingredient oil supply device according to claim 1, wherein Further including: Second mounting seat, the second mounting seat is arranged in the shell, and the second mounting seat is located at the top of the shell, the second mounting seat is in abutment with the front end of the bellows, and the piezoelectric pump is mounted on the second mounting seat.

8. The active micro oil supply device according to claim 7, wherein Further including: Pump pressing cover, the pump pressing cover is arranged on the second mounting seat, and the pump pressing cover is used to press the piezoelectric pump.

9. The active micro-ingredient oil supply device according to claim 1, wherein Further including: Two one-way valves, the two one-way valves are respectively arranged on the oil inlet and the oil outlet of the piezoelectric pump.

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