阅读说明：本技术 用于深海液压系统的并联弹簧式超高压蓄能器 (Parallel spring type ultrahigh pressure energy accumulator for deep sea hydraulic system ) 是由 冷建兴 田永强 刘硕 于 2019-12-05 设计创作，主要内容包括：本发明公开了一种用于深海液压系统的并联弹簧式超高压蓄能器。该蓄能器自上而下依次包括上壳体,浮动体,弹簧和下壳体,上壳体和下壳体通过连接杆连接；浮动体上设有直线轴承,连接杆穿过直线轴承；上壳体的正中心设有活塞杆,活塞杆末端设有组合密封圈槽和一对导向环槽,导向环槽沿组合密封圈槽上下对称分布；组合密封圈槽内装有组合密封圈,导向环槽内装有导向环；浮动体的正中心设有圆筒,圆筒上端开口,下端设有螺纹接口；圆筒和活塞杆配合形成超高压蓄能器的蓄能腔；弹簧用于提供压缩的弹簧力,与蓄能腔内的高压油液压强相平衡。该蓄能器可承压,且可避免执行器启动过程中导致的压力波动,适用于具有压力补偿功能的深海液压系统中。(The invention discloses a parallel spring type ultrahigh pressure energy accumulator for a deep sea hydraulic system. The energy accumulator sequentially comprises an upper shell, a floating body, a spring and a lower shell from top to bottom, wherein the upper shell and the lower shell are connected through a connecting rod; the floating body is provided with a linear bearing, and the connecting rod passes through the linear bearing; a piston rod is arranged in the center of the upper shell, a combined sealing ring groove and a pair of guide ring grooves are formed in the tail end of the piston rod, and the guide ring grooves are distributed along the combined sealing ring groove in an up-and-down symmetrical mode; a combined sealing ring is arranged in the combined sealing ring groove, and a guide ring is arranged in the guide ring groove; a cylinder is arranged in the center of the floating body, the upper end of the cylinder is opened, and a threaded connector is arranged at the lower end of the cylinder; the cylinder and the piston rod are matched to form an energy storage cavity of the ultrahigh pressure energy accumulator; the spring is used for providing compressed spring force, and is balanced with the pressure of high-pressure oil in the energy storage cavity. The energy accumulator can bear pressure, can avoid pressure fluctuation caused in the starting process of the actuator, and is suitable for a deep sea hydraulic system with a pressure compensation function.)

1. A parallel spring type ultrahigh pressure energy accumulator for a deep sea hydraulic system is characterized by sequentially comprising an upper shell, a floating body, a spring and a lower shell from top to bottom;

the upper shell and the lower shell are connected through a connecting rod; the floating body is provided with a linear bearing, and the connecting rod penetrates through the linear bearing to enable the floating body to move up and down along the connecting rod;

a piston rod is arranged in the center of the upper shell, a combined sealing ring groove and a pair of guide ring grooves are formed in the tail end of the piston rod, and the guide ring grooves are distributed in an up-and-down symmetrical mode along the combined sealing ring groove; a combined sealing ring is arranged in the combined sealing ring groove, and a guide ring is arranged in the guide ring groove; a cylinder is further arranged in the center of the floating body, the upper end of the cylinder is provided with an opening, the tail end of the piston rod enters the cylinder through the upper end opening, and a threaded interface is reserved at the lower end of the cylinder and used for connecting a hydraulic oil circuit; the cylinder is matched with the piston rod to form an energy storage cavity of the ultrahigh pressure energy accumulator;

the spring is arranged between the floating body and the lower shell and used for providing compressed spring force which is balanced with the pressure of high-pressure oil in the energy storage cavity.

2. The parallel spring type ultrahigh pressure accumulator for the deep sea hydraulic system according to claim 1, characterized in that: the upper shell and the lower shell are respectively provided with a limiting counter bore and a limiting blind hole which are consistent in size, and the connecting rod is fixedly connected with the upper shell and the lower shell through the limiting counter bore and the limiting blind hole; the floating body is provided with a linear bearing mounting hole for mounting a linear bearing; the diameter of the distribution circle of the limiting counter bore and the limiting blind hole is equal to that of the distribution circle of the linear bearing mounting hole.

3. The parallel spring type ultrahigh pressure accumulator for the deep sea hydraulic system according to claim 1, characterized in that: three spring outer guide sleeves are uniformly distributed on one side of an upper cylinder of the floating body, a spring guide rod is arranged in the center of each spring outer guide sleeve, and a spring inner guide sleeve is arranged at the corresponding position of the lower shell.

4. The parallel spring type ultrahigh pressure accumulator for the deep sea hydraulic system according to claim 1, characterized in that: the diameter of the distribution circle of the connecting rod is equal to that of the distribution circle of the spring.

Technical Field

The invention belongs to the technical field of engineering machinery hydraulic pressure, and particularly relates to a parallel spring type ultrahigh pressure energy accumulator for a deep sea hydraulic system.

Background

An accumulator is an energy storage device in a hydropneumatic system. The energy in the system is converted into compression energy or potential energy to be stored at a proper time, and when the system needs the energy, the compression energy or the potential energy is converted into hydraulic energy or air pressure and the like to be released, and the energy is supplied to the system again.

Common accumulators can be divided into spring accumulators, gas accumulators and piston accumulators. The piston type energy accumulator stores energy by lifting the mass block, but is large in installation limitation, only can be vertically installed and is not suitable for underwater variable environments. The gas type energy accumulator completes energy conversion by compressing gas, is widely applied, and can reach higher energy storage pressure, but the gas type structure is not suitable for deep sea high-pressure environment. The spring type energy accumulator realizes energy conversion through a compression spring, can bear pressure in the whole structure and is structurally suitable for the deep-sea high-pressure environment.

The traditional spring type energy accumulator structure is only suitable for a low-pressure system and is poor in universality, so that the novel spring type energy accumulator structure is designed, and the working pressure of the spring type energy accumulator can be improved.

Disclosure of Invention

Based on the problems in the prior art, the invention provides a parallel spring type ultrahigh pressure energy accumulator for a deep sea hydraulic system. The accumulator provides sufficient spring force by connecting multiple springs in parallel to produce the required charging pressure.

In order to achieve the purpose, the invention adopts the scheme that:

a parallel spring type ultrahigh pressure energy accumulator for a deep sea hydraulic system is characterized by sequentially comprising an upper shell, a floating body, a spring and a lower shell from top to bottom;

the upper shell and the lower shell are connected through a connecting rod, and the connecting rod also penetrates through the floating body; the floating body is provided with a linear bearing, and the connecting rod penetrates through the linear bearing to enable the floating body to move up and down along the connecting rod;

a piston rod is arranged in the center of the upper shell, a combined sealing ring groove and a pair of guide ring grooves are formed in the tail end of the piston rod, and the guide ring grooves are distributed in an up-and-down symmetrical mode along the combined sealing ring groove; a combined sealing ring is arranged in the combined sealing ring groove, and a guide ring is arranged in the guide ring groove; a cylinder is further arranged in the center of the floating body, the upper end of the cylinder is provided with an opening, the tail end of the piston rod enters the cylinder through the upper end opening, and a threaded interface is reserved at the lower end of the cylinder and used for connecting a hydraulic oil circuit; the cylinder is matched with the piston rod to form an energy storage cavity of the ultrahigh pressure energy accumulator;

the spring is arranged between the floating body and the lower shell and used for providing compressed spring force which is balanced with the pressure of high-pressure oil in the energy storage cavity.

In the above technical solution, further, the upper housing and the lower housing are respectively provided with a limiting counter bore and a limiting blind hole of the same size, and the connecting rod is fixedly connected with the upper housing and the lower housing through the limiting counter bore and the limiting blind hole; the floating body is provided with a linear bearing mounting hole for mounting a linear bearing; the diameter of the distribution circle of the limiting counter bore and the limiting blind hole is equal to that of the distribution circle of the linear bearing mounting hole.

Furthermore, three spring outer guide sleeves are uniformly distributed on one side of the upper cylinder of the floating body, a spring guide rod is arranged in the center of each spring outer guide sleeve, and a spring inner guide sleeve is arranged at the corresponding position of the lower shell. The inner guide sleeve and the outer guide sleeve are used for determining the position of the spring, only the outer guide sleeve is needed generally, but when the diameter of the spring is smaller than the length, the inner guide sleeve needs to be added; the spring guide rod is used for guiding the spring to move. The form of inner and outer guide pin bushing and spring guide arm is not fixed, can also adopt other forms to fix and guide the spring, as long as the size is suitable can.

Further, the diameter of the distribution circle of the connecting rod is equal to that of the distribution circle of the spring.

The invention has the beneficial effects that:

according to the working principle of the traditional spring type energy accumulator, the corresponding ultrahigh pressure is realized by arranging a plurality of parallel springs and designing the equivalent area of the inner side of the thick-wall cylinder according to the target pressure, and the universality of the spring type energy accumulator is improved. Meanwhile, different structural parameters are selected in the design process, and different energy storage pressures can be realized.

The spring type energy accumulator has a pressure-bearing integral structure, is suitable for a deep sea hydraulic system with a pressure compensation function, is used for maintaining the working pressure of the hydraulic system and avoids pressure fluctuation caused in the starting process of an actuator.

Drawings

FIG. 1 is a schematic sectional view of the overall structure of a parallel spring type ultrahigh pressure accumulator;

FIG. 2 is a cross-section corresponding to section A-A in FIG. 1;

FIG. 3 is a partial enlarged view of section A-A;

FIG. 4 is a section corresponding to section B-B in FIG. 1;

FIG. 5 is a three-dimensional schematic view of the upper housing;

FIG. 6 is a three-dimensional schematic view of the hull;

fig. 7 is a three-dimensional schematic view of the lower housing.

In the figure, 1, an upper shell, 1.1, a piston rod, 1.2, a combined seal ring groove, 1.3 and 1.4, a guide ring groove, 1.5, a limiting counter bore, 2, a floating body, 2.1, a spring outer guide sleeve, 2.2, a spring guide rod, 2.3, a cylinder, 2.4, a linear bearing mounting hole, 2.5, a threaded interface, 3, a lower shell, 3.1, a spring inner guide sleeve, 3.2, a limiting blind hole, 4, a connecting rod, 5, a linear bearing, 6, a spring, 7, a combined seal ring, 8 and 9 and a guide ring.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

As shown in fig. 1-6, a parallel spring type ultrahigh pressure accumulator for a deep sea hydraulic system comprises an upper shell 1, a lower shell 3, a floating body 2, a connecting rod 4, a spring 6 and a linear bearing 5. The connecting rod 4 is fixed in the limiting counter bores 1.5 and the limiting blind holes 3.2 on the upper shell 1 and the lower shell 3, is used for connecting the upper shell 1 and the lower shell 3 and guides the floating body 2 to move up and down. The end face of the connecting rod 4 in contact with the upper case 1 is provided with a threaded hole for fastening. The linear bearing 5 is mounted on the floating body 2, passing through and moving up and down along the connecting rod 4. A piston rod 1.1 is arranged in the right center of the inner side of the upper shell 1, a combined sealing ring groove 1.2 is arranged at the tail end of the piston rod 1.1, and a pair of guide ring grooves 1.3 and 1.4 are symmetrically arranged above and below the piston rod; the combined sealing ring 7 is placed in the combined sealing ring groove 1.2 and used for sealing the inner and outer pressure of the energy storage cavity; the guide rings 8 and 9 are placed in the guide ring grooves 1.3 and 1.4 and used for supporting and guiding the movement of the piston; a cylinder 2.3 with the wall thickness of about 10mm is arranged in the center of the floating body 2, the upper end of the cylinder 2.3 is provided with an opening, the tail end of a piston rod 1.1 penetrates through the upper end opening to enter the cylinder 2.3, a threaded connector 2.5 is reserved at the lower end of the cylinder 2.3, and the threaded connector 2.5 is used for connecting a hydraulic oil circuit; the cylinder 2.3 is matched with the piston rod 1.1 to form an energy storage cavity of the ultrahigh pressure energy accumulator. The spring 6 is arranged between the floating body 2 and the lower shell 3 and used for providing compressed spring force which is balanced with the pressure of high-pressure oil in the energy storage cavity.

In this embodiment, the wall thickness of the cylinder 2.3 is 10mm, the depth of the cylinder 2.3 is 2mm more than the height of the piston rod 1.1, and the inner diameter of the cylinder 2.3 and the outer diameter of the piston rod 1.1 meet the tolerance standard of f 8.

The size of the limiting counter bore 1.5 of the upper shell 1 is consistent with that of the limiting blind hole 3.2 of the lower shell 3, and the diameter of the distribution circle of the limiting counter bore is equal to that of the distribution circle of the linear bearing mounting hole 2.4 on the floating body 2. The lower end of the cylinder 2.3 is reserved with a thread interface 2.5 for connecting a hydraulic oil way. Three spring outer guide sleeves 2.1 are uniformly distributed on one side of an upper cylinder 2.3 of the floating body 2. A spring guide 2.2 is arranged in the center of each outer guide 2.1, and a spring inner guide 3.1 is arranged in the corresponding position of the lower housing 3. The diameter of the distribution circle of the connecting rod 4 is equal to that of the distribution circle of the spring 6.

During the mounting process, the linear bearing 5 is first mounted at the linear bearing mounting hole 2.4 of the floating body 2. The connecting rod 4 is installed in the limiting blind hole 3.2 of the lower shell 3 and is fixed by welding. The spring 6 is placed at the spring inner guide sleeve 3.1, and the linear bearing 5 integrated on the floating body 2 passes through the connecting rod 4. The spring guide rod 2.2 is aligned with the spring inner guide sleeve 3.1, and the spring 6 is ensured to be wrapped in the spring outer guide sleeve 2.1. The composite seal ring 7 is mounted in the composite seal ring groove 1.2 using special mounting equipment, and the guide rings 8 and 9 are similarly mounted in the guide ring grooves 1.3 and 1.4. The piston rod 1.1 is downwards inserted into the cylinder 2.3, the upper shell 1 is kept horizontal and slowly put down until the connecting rod 4 is inserted into the limiting counter bore 1.5, and the upper shell 1 is fixedly installed by using a fastening screw. The nipple 2.5 is connected to the hydraulic circuit.

In the working process, the spring 6 is in the original length in the initial state, and the pressure in the energy accumulator is not high. As the pressure builds up, the pressurized oil enters the thick-walled cylinder 2.3 through the line connection at the nipple 2.5, creating a high pressure inside. Under the action of pressure, the floating body 2 is gradually translated downwards guided by the linear bearing 5 and the connecting rod 4, and the spring 6 is gradually compressed. Until the working pressure in the hydraulic system is stable and the spring force is balanced with the pressure in the pressure accumulation cavity. When the pressure in the hydraulic system is unstable under the working conditions of actuator movement and the like, the accumulator can provide instantaneous flow to assist in maintaining the pressure of the hydraulic system to be stable.