CN108757597B - Pressure stabilizing and pressurizing oil tank device - Google Patents
Pressure stabilizing and pressurizing oil tank device Download PDFInfo
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- CN108757597B CN108757597B CN201810886356.8A CN201810886356A CN108757597B CN 108757597 B CN108757597 B CN 108757597B CN 201810886356 A CN201810886356 A CN 201810886356A CN 108757597 B CN108757597 B CN 108757597B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/26—Supply reservoir or sump assemblies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The application discloses a pressure-stabilizing pressurizing oil tank device, which comprises a pressurizing tank body assembly, a transmission adjusting assembly and an oil path assembly, wherein the transmission adjusting assembly is connected with the oil path assembly; the pressurizing box body assembly comprises a movable pressurizing element, an upper compressing element, a lower compressing element, an elastic box body and a fixed pressurizing element; the upper pressing element and the lower pressing element are respectively sleeved on the top and bottom outer rings of the cylindrical parts at the two ends of the elastic box body, a movable pressurizing element connected with the upper pressing element is arranged above the upper pressing element, and a fixed pressurizing element connected with the lower pressing element is arranged below the lower pressing element; the movable pressurizing element, the upper compressing element, the lower compressing element, the elastic box body and the fixed pressurizing element form a sealed oil tank structure, and the transmission adjusting assembly is used for driving the movable pressurizing element to move up and down; the oil circuit component is arranged on the pressurizing box body component.
Description
Technical Field
The application relates to a pressure-stabilizing pressurizing oil tank device for a mobile robot and an unmanned mobile mechanical platform with a hydraulic transmission system, and belongs to the technical field of mobile hydraulic systems.
Background
In the field of hydraulically driven mobile robots, such as heavy quadruped robots, high-power exoskeleton robots, unmanned mobile combat platforms and the like, due to the fact that application scenes belong to complex and changeable states, in the working process, shaking and tilting of a machine body and a hydraulic oil tank of a hydraulic system can occur, in the process, an oil tank oil suction pipeline is easily exposed above a liquid level, air is sucked into the hydraulic system to damage precise hydraulic elements, and transmission instability is easily caused. In addition, such applications require components that are lightweight, small in size, and low in noise.
For this purpose, closed pressurized fuel tanks must be used in this type of application. At present, the pressurized oil tank is widely applied to a hydraulic system in the aviation field, and mainly comprises a self-pressurized oil tank, an air-entraining pressurized oil tank and a spring pressurized oil tank. The pressurizing pressure of the self-pressurizing oil tank is only related to the system pressure and is constant, but the oil tank has extremely complex structure, high requirements on manufacturing, assembling and maintenance, and the whole oil tank occupies a large space because of the pressurizing cavity; an air bag is arranged in the air-entraining pressurizing oil tank, a hydraulic medium generates constant pressure by utilizing gas expansion, but a stable high-pressure air source is needed, the pressurizing pressure can be changed greatly along with different temperatures and volumes of the hydraulic medium, the continuous constant pressurizing requirement is difficult to meet, the noise and the volume are large due to the introduction of an air source device, and the air-entraining pressurizing oil tank is difficult to be mounted on a mobile robot platform; the spring pressurizing oil tank pushes the piston by utilizing the pushing action of the spring so as to apply pressure to the hydraulic medium in the other cavity, so that the structure is simple, but along with the reduction of the compression amount of the spring, the pressure of the hydraulic medium is reduced, continuous constant-pressure pressurizing cannot be realized, and the robot application occasion meeting the requirement of high-precision hydraulic transmission cannot be met. And the three pressurized oil tanks are large in volume and weight, poor in heat dissipation and not suitable for being carried on a movable hydraulic driving robot platform. The booster-type oil tank which is applied to the mobile robot platform at present is mostly a reduced version of the three booster-type oil tanks, and the problems exist in the same way.
Disclosure of Invention
Aiming at the problems of complex manufacture, high cost, heavy volume, large space occupation, poor constant pressure effect, difficulty in carrying on a movable hydraulic drive robot platform and the like of the traditional hydraulic pressure boosting oil tank, the application provides the pressure-stabilizing pressure boosting oil tank device which has light weight, low cost, stable pressure boosting and good heat dissipation performance.
The application relates to a pressure stabilizing and pressurizing oil tank device, which adopts the following technical scheme:
the pressure-stabilizing pressurizing oil tank device comprises a pressurizing tank body assembly, a transmission adjusting assembly and an oil path assembly;
the pressurizing box body assembly comprises a movable pressurizing element, an upper compressing element, a lower compressing element, an elastic box body and a fixed pressurizing element; the upper pressing element and the lower pressing element are respectively sleeved on the top and bottom outer rings of the cylindrical parts at the two ends of the elastic box body, a movable pressurizing element connected with the upper pressing element is arranged above the upper pressing element, and a fixed pressurizing element connected with the lower pressing element is arranged below the lower pressing element; the movable pressurizing element, the upper compressing element, the lower compressing element, the elastic box body and the fixed pressurizing element form a sealed mailbox structure, and the transmission adjusting assembly is used for driving the movable pressurizing element to move up and down; the oil circuit component is arranged on the pressurizing box body component.
Further, the movable pressurizing element and the fixed pressurizing element are fixedly connected with partial cylinders; the cylinder parts on the movable pressurizing element and the fixed pressurizing element are respectively inserted into the inner sides of the cylinder parts at the two ends of the elastic box body, and the two ends of the upper compressing element, the lower compressing element and the elastic box body are respectively compressed on the outer sides of the cylinders of the movable pressurizing element and the fixed pressurizing element through connecting pieces, so that a sealed oil tank is formed.
Furthermore, the elastic box body adopts a corrugated structure, and the material has certain elasticity, so that after the hose clamp is locked, two ends can be sealed.
Furthermore, the movable pressurizing element, the upper compressing element and the lower compressing element are all made of light aluminum alloy materials, and the elastic box body part is made of rubber or other elastic materials.
Further, the oil circuit assembly is arranged at the top and the bottom of the pressurizing box body assembly, and the symmetry of the whole device is high.
Further, the transmission adjusting component comprises a top fixing element, a synchronous motor, an elastic coupling, a screw rod support, a screw rod and a screw rod sliding block;
the synchronous motor is arranged at the bottom of the fixed pressurizing element, and screw rod supports at two ends of the screw rod are respectively arranged on the top fixed element and the fixed pressurizing element; the top fixing element is fixedly arranged above the movable pressurizing element; the screw rod sliding block is connected with the movable pressurizing element, and the synchronous motor is connected with the screw rod through an elastic coupling and transmits power; the synchronous motor drives the screw rod to rotate, the screw rod rotates to drive the screw rod sliding block to slide up and down, and the screw rod sliding block drives the movable pressurizing element to move up and down, so that pressurizing or depressurizing of the mailbox is realized.
Further, the pressure-stabilizing pressurizing oil tank device also comprises a guide element, wherein the guide element comprises a group of guide polished rods; the guiding polished rods are arranged in an array along the circumferential direction of the elastic box body, one end of each guiding polished rod is connected to the fixed pressurizing element through a nut, and the other end of each guiding polished rod penetrates through the top of the movable pressurizing element to limit with the nut, so that the guiding effect on the movable pressurizing element is realized.
Further, 4 of the guide polish rods are connected to the top fixing member by nuts after passing through the movable pressurizing member.
Furthermore, the guiding polished rod is of a symmetrical three-section structure, the middle section adopts a thin-wall stainless steel hollow polished rod or a hollow carbon fiber rod, and two ends of the guiding polished rod are respectively connected with a small section of stud.
Further, the oil circuit component comprises a shock-resistant pressure gauge, an oil port connector, a one-way valve and a pressure sensor; the shock-resistant pressure gauge is arranged in the middle of the movable pressurizing element, moves together with the movable pressurizing element and displays the pressure of the oil tank, the oil port connector is arranged at the oil inlet and the oil outlet of the oil tank, the one-way valve is arranged on the oil port connector of the oil inlet, the pressure sensor is connected to the middle of the fixed pressurizing element, and transmits pressure signals in the oil tank to the controller in real time and transmits the pressure signals to the controller, and the controller controls the transmission adjusting assembly to form a closed-loop adjusting system.
The application has the following beneficial effects:
1. the plate component can be made of an aluminum alloy material, the box body part is made of an elastic rubber material, the guide element is of a hollow thin-wall structure, and the integral weight of the device is greatly reduced while the strength and pressure resistance requirements are met;
2. the elastic box body adopts the corrugated structure, has larger air contact area and good heat dissipation performance while meeting the elastic expansion function, and directly uses the self structure as the seal at the two ends of the elastic box body, thereby avoiding additional seal design and reducing the cost;
3. the application adopts the transmission adjusting component and the pressure sensor in the oil circuit component to form a closed-loop adjusting system, can adjust the compression amount of the elastic box body in real time, realizes the function of stable pressurization, and has lower working noise.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.
FIG. 1 is an isometric schematic drawing of the present application.
Fig. 2 is a schematic side view of the present application.
Fig. 3 is a schematic view of the structure of the fixed supercharging element of the present application.
Fig. 4 is a cross-sectional view of the flexible tank structure of the present application.
Fig. 5 is a schematic view of the structure of the pressing element of the present application.
Wherein: 1. the hydraulic pressure sensor comprises a top fixing element, a vibration-resistant pressure gauge, a movable pressurizing element, a compressing element, a guiding polished rod, an elastic box body, a fixed pressurizing element, a throat hoop, a synchronous motor, an elastic coupling, a screw rod support, a screw rod sliding block, an oil port connector, a one-way valve and a pressure sensor.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "upper" and "lower" in the present application, if they mean only the directions of the words corresponding to the upper and lower directions of the drawings, are not limited to the directions, but are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
The terms "mounted," "connected," "secured," and the like are to be construed broadly and refer to either a fixed connection, a removable connection, or an integral body, for example; can be directly connected or indirectly connected through an intermediate medium, can be internally connected or interacted with each other, the above terms are understood in the specific meaning of the present application according to circumstances, for those of ordinary skill in the art.
As described in the background art, pressurized fuel tanks are currently used in a wide variety of hydraulic systems in the aerospace field, mainly self-pressurized fuel tanks, bleed pressurized fuel tanks and spring pressurized fuel tanks. The pressurizing pressure of the self-pressurizing oil tank is only related to the system pressure and is constant, but the oil tank has extremely complex structure, high requirements on manufacturing, assembling and maintenance, and the whole oil tank occupies a large space because of the pressurizing cavity; an air bag is arranged in the air-entraining pressurizing oil tank, a hydraulic medium generates constant pressure by utilizing gas expansion, but a stable high-pressure air source is needed, the pressurizing pressure can be changed greatly along with different temperatures and volumes of the hydraulic medium, the continuous constant pressurizing requirement is difficult to meet, the noise and the volume are large due to the introduction of an air source device, and the air-entraining pressurizing oil tank is difficult to be mounted on a mobile robot platform; the spring pressurizing oil tank pushes the piston by utilizing the pushing action of the spring so as to apply pressure to the hydraulic medium in the other cavity, so that the structure is simple, but along with the reduction of the compression amount of the spring, the pressure of the hydraulic medium is reduced, continuous constant-pressure pressurizing cannot be realized, and the robot application occasion meeting the requirement of high-precision hydraulic transmission cannot be met. And the three pressurized oil tanks are large in volume and weight, poor in heat dissipation and not suitable for being carried on a movable hydraulic driving robot platform. The application provides a pressure-stabilizing pressurizing oil tank device for a mobile robot or an unmanned mobile mechanical platform, which is used for solving the technical problems.
In an exemplary embodiment of the present application, as shown in fig. 1, fig. 1 shows an isometric view of the present application. The device comprises a top fixing element 1, a vibration-resistant pressure gauge 2, a movable pressurizing element 3, a pressing element 4, a guide polished rod 5, an elastic box 6, a fixed pressurizing element 7, a throat hoop 8, a synchronous motor 9, an elastic coupling 10, a screw support 11, a screw 12 and a screw slider 13.
The two ends of the pressing element 4 and the elastic box body 6 are respectively pressed on the outer sides of the cylinders of the movable pressurizing element 3 and the fixed pressurizing element 7 by 2 pairs of hoops 8, and a sealed oil tank is formed by the material characteristics of the elastic box body 6 and contains hydraulic medium;
one end of a group of guide polished rods 5 is connected to the fixed pressurizing element 7 through nuts and is arranged in an array along the circumferential direction of the elastic box body 6, and the other end of the guide polished rods passes through the movable pressurizing element 3 and is provided with nut limiting; 4 of the guide polish rods are connected to the top fixing element by nuts after passing through the movable pressurizing element.
Furthermore, the guiding polished rod is of a symmetrical three-section structure, the middle section is a thin-wall stainless steel hollow polished rod or a hollow carbon fiber rod, and two ends of the guiding polished rod are respectively connected with a small section of stud; the whole weight of the device is greatly reduced while the strength and pressure resistance requirements are met
The 2 synchronous motors 9 are symmetrically arranged at the two side flanges of the fixed pressurizing element 7 through bolts, the 2 screw rod sliding blocks 13 are symmetrically connected at the two side flanges of the movable pressurizing element 3 through bolts, and the top fixing element 1 is fixed at the upper ends of the 4 guide polished rods closest to the two side flanges of the movable pressurizing element 3 through nuts; the 2 pairs of screw supports 11 are symmetrically arranged on two sides of the top fixing element 1 and the fixed pressurizing element 7 respectively and are coaxial with the 2 synchronous motors 9 respectively; the 2 screw rods 12 are respectively arranged on the 2 pairs of screw rod supports 11, and the lower ends of the screw rods 12 are connected with the synchronous motor 9 through the elastic coupling 10. In the working process of the device, the two synchronous motors 9 jointly output rotary power to drive the screw rod 12 to rotate, so that the screw rod sliding block 13 moves along the axial direction of the screw rod 12, and further drives the movable pressurizing element 3 to move downwards along the guide polished rod 5, and the elastic box 6 is compressed, so that the pressure of an internal hydraulic medium is increased; the guiding polished rod 5 arranged along the circumferential array has guiding effect on the movable pressurizing element 3, and can ensure that the elastic box body 6 can not have expansion deviation accidents in the compression process under any body shaking or oil tank installation orientation, and the stroke limit of the screw rod sliding block 13 is 5% larger than the compressible limit of the elastic box body 6; the shock-resistant pressure gauge 2 is installed at the right central position of the movable pressure-resistant plate 3, and is used for assisting in displaying the pressure of the hydraulic medium along with the movement of the movable pressure-resistant plate 3.
The number of the synchronous motors 9 can be multiple, and when the size and the mass of the mailbox are relatively large, the plurality of synchronous motors can be used for driving the movable pressurizing element 3 to move.
Fig. 2 presents a side schematic view of the application, which more fully illustrates the component mounting of the various locations. In addition to the illustration of fig. 1, an oil port fitting 14, a one-way valve 15 and a pressure sensor 16 are included. The oil port connector 14 is arranged on an oil inlet and an oil outlet of the fixed pressure resistant plate 7 and is used for connecting an oil pipe; the oil pipe joint 14 of the oil inlet is also connected with a one-way valve 15 to prevent the oil from flowing backwards when the oil tank is filled with oil for the first time and works normally; the pressure sensor 16 is installed at the center of the fixed pressure-resistant plate 7, and is used for sending a pressure signal in the oil tank to the controller in real time, forming a pressure closed loop with the synchronous motor 9 as feedback, and the controller controls the rotation of the synchronous motor 9 in real time according to the pressure signal, so as to regulate the displacement of the movable pressure-resistant plate 3, finally, the compressed quantity of the elastic tank body 6 meets the set pressure requirement of the oil tank, and the function of pressure stabilization and pressurization is realized.
Fig. 3 is a schematic view of the structure of the fixed supercharging element of the present application. The device can adopt a plate-like element, and specifically comprises a plate, wherein a cylinder part is arranged in the middle of the plate, flange parts are symmetrically arranged on two sides of the plate, and two oil ports and a small pressure test port are formed in the middle of the plate; the pressure of the pressurizing oil tank is generally about 2bar, which belongs to the ultra-low pressure working requirement, so that the fixed pressurizing element 7 adopts light aluminum alloy or other light waterproof pressure-resistant materials.
It should be noted that the structure of the movable supercharging element 3 is substantially similar to that of the fixed supercharging element 7, except that the movable supercharging element 3 has only a small pressure test port in the middle, and the flanges on both sides are smaller than those of the fixed supercharging element 7, and the rest are the same, and the description of the drawings will not be repeated.
Fig. 4 is a cross-sectional view of the structure of the elastic case of the present application, in which the case is a bellows-like body, and the elastic expansion and sealing functions are realized by using rubber or other elastic sealing materials, so that the larger bellows area can better dissipate heat.
Fig. 5 shows a schematic view of the structure of the pressing element of the present application. The middle of the pressing element 4 is designed with a small section of cylinder section, and the side surface of the pressing element is provided with an inclined opening, so that the pressing element is not a closed disc, is favorable for installation and locking of the throat hoop 8, and in addition, the important function of the pressing element 4 is to uniformly transmit the pressing force to the elastic box body 6, so that the elastic box body 4 is prevented from being cut by the throat hoop 8.
When the pressure-stabilizing pressurizing oil tank device is implemented, the pressure-stabilizing pressurizing oil tank device can be conveniently mounted on a hydraulic-driven mobile robot or an unmanned mobile mechanical platform in any direction, and a hydraulic pump set and a motor can be completely integrated in the lower space of the fixed pressure-resisting plate 7. In the normal working process, the pressure oil in the elastic box body 6 reaches the oil suction port of the hydraulic pump through the oil outlet and the filter, and the return oil of the whole hydraulic system finally flows back into the elastic box body 6 through the one-way valve 15, and in the process, the controller adjusts the movable pressurizing element 3 to compress downwards or release the elastic box body 6 upwards along the guide polished rod 5 through the screw transmission device in real time according to the feedback signal of the pressure sensor 16 so as to stabilize the oil pressure in the box body at a set value and adapt to the volume change of the hydraulic medium without being influenced by the shaking of the box body.
The application has the advantages of light weight, compact whole structure, convenient manufacture and assembly, low cost, strong reliability, low noise, capability of stably pressurizing the oil in the box body in real time by utilizing a simple pressure closed loop, no interference from external environment, strong heat radiation capability, outstanding advantages of a hydraulic system easy to generate heat and obvious technical effect.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. The pressure-stabilizing pressurizing oil tank device is characterized by comprising a pressurizing tank body assembly, a transmission adjusting assembly and an oil path assembly;
the pressurizing box body assembly comprises a movable pressurizing element, an upper compressing element, a lower compressing element, an elastic box body and a fixed pressurizing element; the upper pressing element and the lower pressing element are respectively sleeved on the top and bottom outer rings of the cylindrical parts at the two ends of the elastic box body, a movable pressurizing element connected with the upper pressing element is arranged above the upper pressing element, and a fixed pressurizing element connected with the lower pressing element is arranged below the lower pressing element; the movable pressurizing element, the upper compressing element, the lower compressing element, the elastic box body and the fixed pressurizing element form a sealed oil tank structure, and the transmission adjusting assembly is used for driving the movable pressurizing element to move up and down; the oil circuit component is arranged on the pressurizing box body component;
the transmission adjusting component comprises a top fixing element, a synchronous motor, an elastic coupling, a screw rod support, a screw rod and a screw rod sliding block;
the synchronous motor is arranged at the bottom of the fixed pressurizing element, and screw rod supports at two ends of the screw rod are respectively arranged on the top fixed element and the fixed pressurizing element; the top fixing element is fixedly arranged above the movable pressurizing element; the screw rod sliding block is connected with the movable pressurizing element, and the synchronous motor is connected with the screw rod through an elastic coupling and transmits power;
the oil circuit component comprises a shock-resistant pressure gauge, an oil port connector, a one-way valve and a pressure sensor; the shock-resistant pressure gauge is arranged in the middle of the movable pressurizing element, moves together with the movable pressurizing element and displays the pressure of the oil tank, the oil port connector is arranged at the oil inlet and the oil outlet of the oil tank, the one-way valve is arranged on the oil port connector of the oil inlet, the pressure sensor is connected to the middle of the fixed pressurizing element, and transmits pressure signals in the oil tank to the controller in real time and transmits the pressure signals to the controller, and the controller controls the transmission adjusting assembly to form a closed-loop adjusting system.
2. The pressure-stabilizing and pressurizing oil tank device as claimed in claim 1, wherein a part of cylinder is fixedly connected to the movable pressurizing element and the fixed pressurizing element; the cylinder parts on the movable pressurizing element and the fixed pressurizing element are respectively inserted into the inner sides of the cylinder parts at the two ends of the elastic box body, and the two ends of the upper compressing element, the lower compressing element and the elastic box body are respectively compressed on the outer sides of the cylinders of the movable pressurizing element and the fixed pressurizing element through connecting pieces, so that a sealed oil tank is formed.
3. The pressure stabilizing and pressurizing oil tank device as claimed in claim 1, wherein the elastic tank body adopts a corrugated structure, and the material has certain elasticity.
4. The pressure stabilizing and pressurizing oil tank device as claimed in claim 1, wherein the movable pressurizing element, the upper compressing element and the lower compressing element are made of light aluminum alloy materials, and the elastic tank body part is made of elastic materials.
5. The pressure regulating pressurized fuel tank assembly of claim 1, further comprising a guide member, said guide member comprising a set of guide polished rods; the guiding polished rods are arranged in an array along the circumferential direction of the elastic box body, one end of each guiding polished rod is connected to the fixed pressurizing element through a nut, and the other end of each guiding polished rod penetrates through the top of the movable pressurizing element and is fixed through the nut, so that the guiding effect on the movable pressurizing element is realized.
6. The pressure stabilizing and pressurizing oil tank apparatus as set forth in claim 5, wherein 4 of said guiding polish rods are connected to said top fixing member by nuts after passing through said movable pressurizing member.
7. The pressure stabilizing and pressurizing oil tank device as claimed in claim 5, wherein the guiding polished rod is of a symmetrical three-section structure, the middle section is a thin-wall stainless steel hollow polished rod or a hollow carbon fiber rod, and two ends of the guiding polished rod are respectively connected with a small section of stud.
8. The pressure stabilizing and pressurizing oil tank apparatus as claimed in claim 1, wherein said oil path assembly is installed at the top and bottom of the pressurizing oil tank assembly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810886356.8A CN108757597B (en) | 2018-08-06 | 2018-08-06 | Pressure stabilizing and pressurizing oil tank device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810886356.8A CN108757597B (en) | 2018-08-06 | 2018-08-06 | Pressure stabilizing and pressurizing oil tank device |
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| CN108757597B true CN108757597B (en) | 2023-10-03 |
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| CN113883106B (en) * | 2021-10-12 | 2022-06-03 | 燕山大学 | Self-variable-volume elastic hydraulic oil tank and control method thereof |
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| CN204921817U (en) * | 2015-07-23 | 2015-12-30 | 童欣 | Train oil pressure shock absorber |
| CN106640782A (en) * | 2015-10-30 | 2017-05-10 | 北京精密机电控制设备研究所 | Self-pressurized oil tank device |
| CN108119422A (en) * | 2017-11-23 | 2018-06-05 | 宜宾三江机械有限责任公司 | A kind of hydraulic is from pressurized fuel tank |
| CN207647868U (en) * | 2017-12-05 | 2018-07-24 | 沈阳航天新光集团有限公司 | Enclosed welding bellows liquid case |
| CN108302070A (en) * | 2018-03-09 | 2018-07-20 | 山东大学 | A kind of gas-liquid is compound from pressurized fuel tank |
| CN208518979U (en) * | 2018-08-06 | 2019-02-19 | 山东大学 | A kind of pressure-stabilizing supercharging tank mounting |
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|---|---|
| CN108757597A (en) | 2018-11-06 |
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