阅读说明：本技术 一种自增压式增压油箱 (Self-pressurization type pressurization oil tank ) 是由 寸有超 张康军 李天齐 张浩然 刘�文 范玉浪 李中金 于 2020-06-05 设计创作，主要内容包括：本发明公开了一种自增压式增压油箱,包括油箱壳体和增压装置,增压装置包括油箱后盖,油箱后盖与油箱壳体密封连接,油箱后盖上设置有进油口和柱塞导向孔,进油口通过预设在油箱后盖内的连通通道与柱塞导向孔连通,进油口通过油管组件与预设在油箱壳体中的高压油路对接连通；柱塞导向孔中设置有可以伸缩的增压柱塞组件,增压柱塞组件的外露端抵在增压活塞上,增压柱塞组件的外围设置有弹性元件,弹性元件的两端分别抵在油箱后盖和增压活塞上。本发明通过采用自增压模式,能够在系统工作状态下提供高压保证高转速条件下液压泵的自吸性能,在非工作状态下保持较低压力以提高长期贮存的密封可靠性。(The invention discloses an automatic pressurization type pressurization oil tank, which comprises an oil tank shell and a pressurization device, wherein the pressurization device comprises an oil tank rear cover, the oil tank rear cover is in sealing connection with the oil tank shell, an oil inlet and a plunger piston guide hole are arranged on the oil tank rear cover, the oil inlet is communicated with the plunger piston guide hole through a communication channel preset in the oil tank rear cover, and the oil inlet is communicated with a high-pressure oil way preset in the oil tank shell in a butt joint mode through an oil pipe assembly; a telescopic pressurizing plunger assembly is arranged in the plunger guide hole, the exposed end of the pressurizing plunger assembly abuts against the pressurizing piston, an elastic element is arranged on the periphery of the pressurizing plunger assembly, and two ends of the elastic element respectively abut against the oil tank rear cover and the pressurizing piston. The self-priming pump adopts a self-pressurization mode, can provide high pressure under the working state of the system to ensure the self-priming performance of the hydraulic pump under the condition of high rotating speed, and keeps lower pressure under the non-working state to improve the sealing reliability of long-term storage.)

1. An auto-supercharging type supercharging oil tank comprises an oil tank shell (1) and is characterized by further comprising a supercharging device (2) arranged on the oil tank shell (1);

the supercharging device (2) comprises an oil tank rear cover (201), the oil tank rear cover (201) is in sealing connection with the oil tank shell (1), an oil inlet (205) and a plunger guide hole (206) are formed in the oil tank rear cover (201), the oil inlet (205) is communicated with the plunger guide hole (206) through a communication channel (207) preset in the oil tank rear cover (201), and the oil inlet (205) is communicated with a high-pressure oil path (4) preset in the oil tank shell (1) in a butt joint mode through an oil pipe assembly (3); be provided with pressure boost plunger subassembly (203) that can stretch out and draw back in plunger guiding hole (206), the end that exposes of pressure boost plunger subassembly (203) supports on pressure boost piston (204), pressure boost piston (204) with predetermine oil pocket (5) sliding seal in oil tank casing (1) is connected, the periphery of pressure boost plunger subassembly (203) is provided with elastic element (202), the both ends of elastic element (202) support respectively behind the oil tank on lid (201) and pressure boost piston (204).

2. The self-pressurizing type pressurized oil tank as claimed in claim 1, wherein a first sealing ring (8) is arranged on the circumferential outer wall of the mounting part of the oil tank rear cover (201).

3. The self-pressurizing fuel tank according to claim 2, wherein the fuel tank rear cover (201) is mounted on the fuel tank case (1) by bolts.

4. An auto-supercharging tank according to claim 1, wherein the outer circumferential wall of the supercharging piston (204) is provided with three first annular grooves, the first annular grooves on both sides are provided with second sealing rings (9), and the first annular groove in the middle is provided with a third sealing ring (10) and a first retainer ring (11).

5. The self-pressurizing fuel tank according to claim 1, wherein the elastic member (202) is a coil spring.

6. The self-pressurizing oil tank according to claim 1, wherein the oil pipe assembly (3) comprises an oil pipe (301) and four fourth sealing rings (302) sleeved on the oil pipe (301).

7. The self-pressurizing oil tank according to claim 1, wherein the communication passage (207) includes a first passage (207-1) and a second passage (207-2) which are arranged in a V shape and communicate with each other, the first passage (207-1) communicates with the oil inlet (205), and the second passage (207-2) communicates with the plunger guide hole (206).

8. The self-pressurization type pressurized oil tank as claimed in claim 7, wherein a process hole (6) is formed at the communication part of the first channel (207-1) and the second channel (207-2), and the process hole (6) is sealed by a blocking cover (7).

9. The self-pressurization type pressurization oil tank as claimed in claim 1, wherein the pressurization plunger assembly (203) comprises a pressurization plunger (203-1) and a centering rod (203-2), the centering rod (203-2) is embedded in the pressurization plunger (203-1) in a sliding mode, an outer leakage end of the centering rod (203-2) abuts against the pressurization piston (204), and a connection end of the pressurization plunger (203-1) is connected in the plunger guide hole (206) in a sliding and sealing mode.

10. The self-pressurization type pressurization oil tank as claimed in claim 9, characterized in that a second annular groove is arranged on the inner wall of the plunger guide hole (206), a fifth sealing ring (12) and a second retaining ring (13) are arranged in the second annular groove, and the fifth sealing ring (12) and the second retaining ring (13) are sleeved on the pressurization plunger (203-1).

11. The self-pressurization type pressurization oil tank as claimed in claim 9, characterized in that both ends of the centering rod (203-2) are hemispherical, and the pressing contact surfaces of the pressurization piston (204), the pressurization plunger (203-1) and the hemispherical end of the centering rod (203-2) are hemispherical concave surfaces.

Technical Field

The invention relates to the technical field of pressurized oil tanks, in particular to a self-pressurized oil tank.

Background

The pressurizing oil tank is used as an important component of the integrated electro-hydraulic servo system and has the functions of storing and providing working media with certain pressure, dissipating heat, compensating and the like.

The existing supercharged oil tank generally adopts a double-supercharged spring structure to act on an oil tank piston, and supercharging is realized through the pre-compression design of a supercharged spring. The pressure booster spring has the characteristic of simple structure, but has higher requirement on the stability of the pressure booster spring, pressure change is caused by inevitable plastic deformation in the process of long-time work or long-term storage, and especially under the condition of high pressure requirement, the higher the rigidity of the pressure booster spring is, the higher the requirement on the stability treatment of the manufacturing process is.

The pressurization mode of the double-pressurization spring structure cannot ensure the oil absorption performance of the hydraulic pump in a high-rotation-speed electro-hydraulic servo system with the rotation speed of the hydraulic pump exceeding 12000r/min, and the performance of the system is limited; in addition, the electro-hydraulic servo system is put in a state of relatively high pressure during the storage period, resulting in a decrease in sealing reliability.

Disclosure of Invention

The invention aims to provide a novel pressurizing oil tank, which aims to solve the problems that a pressurizing mode of a double-pressurizing spring structure is simple in structure and low in stability, and especially the oil absorption performance of a hydraulic pump cannot be ensured in a high-rotating-speed electro-hydraulic servo system with the rotating speed of the hydraulic pump exceeding 12000r/min, so that the performance of the system is limited.

In order to achieve the above purpose, the invention provides the following technical scheme:

the invention relates to a self-pressurization type pressurization oil tank which comprises an oil tank shell and a pressurization device arranged on the oil tank shell;

the pressurizing device comprises an oil tank rear cover, the oil tank rear cover is hermetically connected with the oil tank shell, an oil inlet and a plunger guide hole are formed in the oil tank rear cover, the oil inlet is communicated with the plunger guide hole through a communication channel preset in the oil tank rear cover, and the oil inlet is communicated with a high-pressure oil path preset in the oil tank shell in a butt joint mode through an oil pipe assembly; the oil tank pressurization plunger assembly is characterized in that a telescopic pressurization plunger assembly is arranged in the plunger guide hole, the exposed end of the pressurization plunger assembly abuts against a pressurization piston, the pressurization piston is connected with an oil cavity preset in the oil tank shell in a sliding and sealing mode, an elastic element is arranged on the periphery of the pressurization plunger assembly, and two ends of the elastic element respectively abut against the oil tank rear cover and the pressurization piston.

Furthermore, a first sealing ring is arranged on the circumferential outer wall of the oil tank rear cover installation part.

Further, the oil tank rear cover is mounted on the oil tank shell through bolts.

Furthermore, three first annular grooves are formed in the outer circular wall of the pressurizing piston, second sealing rings are arranged in the first annular grooves on two sides, and a third sealing ring and a first check ring are arranged in the first annular groove in the middle.

Further, the elastic element is a spiral spring.

Further, the oil pipe assembly comprises an oil pipe and four fourth sealing rings sleeved on the oil pipe.

Further, the communication channel comprises a first channel and a second channel which are arranged in a V shape and communicated with each other, the first channel is communicated with the oil inlet, and the second channel is communicated with the plunger guide hole.

Furthermore, the communication part of the first channel and the second channel is provided with a process hole, and the process hole is sealed through a blocking cover.

Furthermore, the pressurizing plunger assembly comprises a pressurizing plunger and a centering rod, the centering rod is embedded into the pressurizing plunger in a sliding mode, the outer leakage end of the centering rod abuts against the pressurizing piston, and the connecting end of the pressurizing plunger is connected into the plunger guide hole in a sliding and sealing mode.

Furthermore, a second annular groove is formed in the inner wall of the plunger guide hole, a fifth sealing ring and a second retaining ring are arranged in the second annular groove, and the fifth sealing ring and the second retaining ring are sleeved on the boosting plunger.

Furthermore, both ends of the centering rod are hemispherical, and the pressing contact surfaces of the pressurizing piston, the pressurizing plunger and the hemispherical end part of the centering rod are hemispherical concave surfaces.

Compared with the prior art, the invention has the beneficial effects that:

the invention relates to an auto-supercharging type supercharging oil tank, which comprises an oil tank shell and a supercharging device, wherein when a system is in a working state, high-pressure oil in a high-pressure oil line enters a supercharging oil tank through an oil pipe assembly, the high-pressure oil acts on the end surface of a supercharging plunger piston, and pressure is transmitted to a supercharging piston through a centering rod to generate pressure on the oil in the oil tank; meanwhile, the elastic element in the oil tank is in a compressed state, and the pressure effect is also generated on the pressurizing piston. Under the combined action of the elastic element and the high-pressure oil pressure, the pressurizing piston moves and compresses oil in the oil tank, so that the oil in the oil tank has certain pressure, and particularly in a high-rotating-speed electro-hydraulic servo system with the rotating speed of a hydraulic pump exceeding 12000r/min, the oil absorption performance of the hydraulic pump is effectively ensured, and the performance of a hydraulic system is fully exerted; when the system is in a non-working state, no high-pressure oil pressure action exists in the high-pressure oil way, the pressure of the oil tank is mainly generated by the elasticity of the elastic element, and under the action of relatively small elasticity, the' suction of the hydraulic pump at the moment of starting the system is avoided, the negative pressure in the system is also avoided, the pressure of the system is maintained in a relatively small state, and the sealing reliability of long-term storage is improved; the self-priming pump adopts a self-pressurization mode, can provide high pressure under the working state of the system to ensure the self-priming performance of the hydraulic pump under the condition of high rotating speed, and keeps lower pressure under the non-working state to improve the sealing reliability of long-term storage.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of a partial structure of an auto-supercharging oil tank according to the present invention;

FIG. 2 is a schematic structural view of a supercharging device according to the present invention;

FIG. 3 is a schematic structural view of the tubing assembly of the present invention.

Reference numeral 1, a tank case; 2. a pressure boosting device; 201. a rear cover of the oil tank; 202. an elastic element; 203. a plunger assembly; 203-1, a pressurizing plunger; 203-2, a centering rod; 204. a booster piston; 205. an oil inlet; 206. a plunger guide hole; 207. a communication channel; 207-1, a first channel; 207-2, a second channel; 3. an oil pipe assembly; 301. an oil pipe; 302. a fourth seal ring; 4. a high-pressure oil path; 5. an oil chamber; 6. a fabrication hole; 7. blocking the cover; 8. a first seal ring; 9. a second seal ring; 10. a third seal ring; 11. a first retainer ring; 12. a fifth seal ring; 13. and a second retainer ring.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 to 2, the present embodiment discloses a self-pressurizing type pressurized oil tank, which includes an oil tank housing 1 and a pressurizing device 2 disposed on the oil tank housing 1.

As shown in fig. 2, the pressurizing device 2 includes a tank back cover 201, an elastic member 202, a plunger assembly 203, and a pressurizing piston 204. Lid 201 passes through the bolt and installs on oil tank shell 1 behind the oil tank, is provided with first sealing washer 8 on the circumference outer wall of lid 201 installation department behind the oil tank, and first sealing washer 8's cross section is circular, and first sealing washer 8 guarantees the leakproofness that lid 201 and oil tank shell 1 are connected behind the oil tank. An oil inlet 205 and a plunger guide hole 206 are formed in the oil tank rear cover 201, and the oil inlet 205 is communicated with the plunger guide hole 206 through a communication channel 207 preset in the oil tank rear cover 201.

The oil inlet 205 is in butt joint communication with a high-pressure oil path 4 preset in the oil tank shell 1 through an oil pipe assembly 3. The telescopic pressurizing plunger assembly 203 is arranged in the plunger guide hole 206, the exposed end of the pressurizing plunger assembly 203 abuts against the pressurizing piston 204, the pressurizing piston 204 is connected with the oil cavity 5 preset in the oil tank shell 1 in a sliding and sealing mode, the sealing structure is characterized in that three first annular grooves are formed in the outer circular wall of the pressurizing piston 204, second sealing rings 9 are arranged in the first annular grooves on two sides, the cross section of each second sealing ring 9 is rectangular, a third sealing ring 10 and a first retainer ring 11 are arranged in the first annular groove in the middle, and the cross section of each third sealing ring 10 is circular. The periphery of the pressurizing plunger assembly 203 is provided with an elastic element 202, and two ends of the elastic element 202 are respectively abutted against the oil tank rear cover 201 and the pressurizing piston 204. In the present embodiment, the elastic member 202 is a coil spring.

As shown in fig. 3, the oil pipe assembly 3 includes an oil pipe 301 and four fourth sealing rings 302 sleeved on the oil pipe 301, the cross section of the fourth sealing rings 302 is circular, and the end portions of the oil pipe 301 are respectively inserted into the interfaces of the oil inlet 205 and the high-pressure oil passage 4 preset in the oil tank housing 1.

In the present embodiment, the communication passage 207 includes a first passage 207-1 and a second passage 207-2 arranged in a V-shape and communicating, the first passage 207-1 communicating with the oil inlet 205, and the second passage 207-2 communicating with the plunger guide hole 206. It should be noted that the first channel 207-1 and the second channel 207-2 are arranged in a V shape, and during the processing, the two channels need to be communicated through the fabrication hole 6, the fabrication hole 6 is sealed by the blanking cover 7 at the later stage, and the blanking cover 7 is connected to the oil tank rear cover 201 through a bolt.

In the embodiment, the pressurizing plunger assembly 203 comprises a pressurizing plunger 203-1 and a centering rod 203-2, the centering rod 203-2 is embedded in the pressurizing plunger 203-1 in a sliding manner, the outer leakage end of the centering rod 203-2 abuts against the pressurizing piston 204, both ends of the centering rod 203-2 are hemispherical, and the pressing contact surfaces of the pressurizing piston 204, the pressurizing plunger 203-1 and the hemispherical end of the centering rod 203-2 are hemispherical concave surfaces, so that the design ensures that the pressurizing piston 204 does not overturn. The centering rod 203-2 is designed to ensure that the booster piston 204 moves stably and has no overturn from the position degree, so that the situation that the piston is scraped and rubbed with the inner wall of the oil tank shell due to overturn in the piston movement process under the condition of no centering rod, the surface roughness is reduced, and the sealing ring is scratched, so that the sealing reliability is influenced is effectively avoided. The attached end of the pressurizing plunger 203-1 is slidably and sealingly attached in the plunger guide hole 206. Specifically, a second annular groove is formed in the inner wall of the plunger guide hole 206, a fifth sealing ring 12 and a second retaining ring 13 are arranged in the second annular groove, the cross section of the fifth sealing ring 12 is rectangular, and the fifth sealing ring 12 and the second retaining ring 13 are sleeved on the pressurizing plunger 203-1. The pressurizing plunger assembly 203 has the characteristics of simple structure and easier pressure increment obtaining.

The working process of the invention is as follows:

when the system is in a working state, high-pressure oil in a high-pressure oil way 4 enters a pressurizing oil tank through an oil pipe assembly 3, the high-pressure oil acts on the end face of a pressurizing plunger 203-1, and pressure is transmitted to a pressurizing piston 204 through a centering rod 203-2 to generate pressure on the oil in the oil tank; at the same time, since the elastic element 202 in the oil tank is in a compressed state, a pressure effect is also generated on the booster piston 204. Under the combined action of the elasticity of the elastic element 202 and the pressure of the high-pressure oil, the booster piston 204 moves and compresses the oil in the oil tank, so that the oil in the oil tank has a certain pressure, and the oil absorption performance of the hydraulic pump is ensured. It should be noted that the high-pressure oil in the high-pressure oil passage 4 is derived from oil in the system hydraulic circuit.

When the system is in a non-working state, the high-pressure oil pressure in the high-pressure oil passage 4 does not act, and the oil tank pressure is mainly generated by the elastic element 202, in the embodiment, the elastic force of the spiral spring, so that the suction of the hydraulic pump at the moment of starting the system is avoided, the negative pressure in the system is avoided, the system pressure is maintained in a relatively small state, and the sealing reliability of long-term storage is improved.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.