A dynamic compensation system for gas in a closed oil tank based on an energy storage bladder in a bending machine.

Abstract

This utility model discloses a dynamic gas compensation system for a bending machine based on an accumulator-filled airbag in a sealed oil tank. The system includes a chamber, a cylinder, and a hydraulic valve assembly. The cylinder is equipped with the hydraulic valve assembly. The chamber is divided into a pump assembly chamber, a sealed oil tank, and an airbag chamber by a partition. A motor-driven pump assembly is installed in the pump assembly chamber, which is connected to the hydraulic valve assembly and the sealed oil tank via hydraulic pipelines. An accumulator-filled airbag is installed in the airbag chamber, and its pipes extend to the upper part of the oil tank. The cylinder is connected to a filling pipe that extends into the oil tank. This utility model achieves: zero-air-contact oil sealing protection, pressure self-balancing without breathing effect, and an extension of hydraulic oil life by more than 50% by constructing a closed-loop inert gas circulation through an accumulator.

Description

Technical Field

[0001] This utility model relates to the technical field of bending machines, specifically a dynamic compensation system for gas in a sealed oil tank based on an energy storage bladder for bending machines. Background Technology

[0002] CNC bending machines use equipped molds to bend cold metal sheets into workpieces with various geometric cross-sectional shapes. They are sheet metal forming machines designed for cold-rolled sheet metal processing and are widely used in sheet metal bending processing in industries such as automobiles, aircraft manufacturing, light industry, shipbuilding, containers, elevators, and railway vehicles.

[0003] Traditional hydraulic systems have the following drawbacks:

[0004] Open-type fuel tank: The fuel is in direct contact with the air, leading to oxidation and deterioration and moisture intrusion;

[0005] Traditional sealed oil tank: When the sealed oil tank undergoes volume expansion / contraction changes caused by the hydraulic circuit, it exhales and inhales inert gas from the airbag (the inert gas in the airbag is gradually lost). Utility Model Content

[0006] The purpose of this invention is to provide a dynamic compensation system for gas in a sealed oil tank based on an energy storage bladder for a bending machine, in order to solve the problems in the prior art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a dynamic compensation system for gas in a sealed oil tank based on an energy storage airbag for a bending machine, comprising a chamber, an oil cylinder, and a hydraulic valve group. The oil cylinder is equipped with the hydraulic valve group. The chamber is divided into a pump group chamber, a sealed oil tank, and an airbag chamber by a partition. A motor pump group is installed in the pump group chamber. The motor pump group is connected to the hydraulic valve group and the sealed oil tank respectively through hydraulic pipelines. An energy storage airbag is installed in the airbag chamber. The airbag's pipeline extends to the upper part of the oil tank. The oil cylinder is connected to a filling pipe, which extends into the oil tank.

[0008] Preferably, the sealed oil tank is provided with an oil inlet, and a sealing cap is installed at the oil inlet.

[0009] Preferably, the airbag compartment is equipped with an inspection cover.

[0010] Preferably, the pump unit compartment is equipped with a cover.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: When the motor pump unit is started, the oil pump draws hydraulic oil into the sealed oil tank. Since the volume of the sealed oil tank cannot change, the inert gas can only be released by the accumulator bladder to meet the dynamic balance of the sealed oil tank volume. Through the hydraulic pipeline and hydraulic valve group, pressure (27MPa) is provided to the oil cylinder, causing the oil cylinder to move up and down to complete the bending action. The oil returns to the oil tank through the filling pipe. The accumulator bladder recovers the inert gas to complete the entire bending process. By constructing a closed-loop inert gas circulation through the accumulator, the following are achieved: oil sealing protection with zero air contact, pressure self-balancing without breathing effect, and extension of hydraulic oil life by more than 50%. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure when the cover plate of this utility model is removed.

[0015] In the diagram: 1. Hull; 2. Hatch cover; 3. Oil inlet; 4. Inspection cover; 5. Filling pipe; 6. Oil cylinder; 7. Hydraulic valve assembly; 8. Hydraulic pipeline; 9. Motor pump assembly; 10. Pump assembly compartment; 11. Sealed oil tank; 12. Energy storage airbag. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0017] Please see Figure 1-2In this embodiment of the present invention, a dynamic compensation system for a bending machine based on an energy storage airbag in a sealed oil tank includes a chamber 1, a cylinder 6, and a hydraulic valve assembly 7. The cylinder 6 is equipped with the hydraulic valve assembly 7. The chamber is divided into a pump assembly chamber 10, a sealed oil tank 11, and an airbag chamber by a partition. A motor pump assembly 9 is installed in the pump assembly chamber 10. The motor pump assembly 9 is connected to the hydraulic valve assembly 7 and the sealed oil tank 11 via hydraulic pipelines 8. An energy storage airbag 12 is installed in the airbag chamber, and the airbag's pipe extends to the upper part of the oil tank. The cylinder 6 is connected to a filling pipe 5, which extends... The pump extends into the oil tank; the motor pump unit is started, and the oil pump draws hydraulic oil into the sealed oil tank. Since the volume of the sealed oil tank cannot change, inert gas can only be released by the accumulator bladder to maintain the dynamic balance of the sealed oil tank volume. Through the hydraulic pipeline and hydraulic valve group, pressure (27MPa) is provided to the oil cylinder, causing the oil cylinder to move up and down to complete the bending action. The gas returns to the oil tank through the filling pipe; the accumulator bladder recovers the inert gas to complete the entire bending process. Through the accumulator, a closed-loop inert gas circulation is constructed, achieving: zero air contact oil sealing protection, pressure self-balancing without breathing effect, and extending the hydraulic oil life by more than 50%. The oxygen contact of the oil is reduced by 99.7%, and the oxidation life is extended by 2-3 times; the leakage failure rate is reduced by 70%, reducing downtime losses; maintenance costs are reduced by 40%, and waste oil disposal volume is reduced by 60%.

[0018] The sealed oil tank 11 is provided with an oil inlet 3, and a sealing cover is installed at the oil inlet 3. The airbag compartment is equipped with a maintenance cover 4, and the pump unit compartment 10 is equipped with a hatch cover 2.

[0019] The working principle of this utility model is as follows: When the motor pump unit is started, the oil pump draws in hydraulic oil from the sealed oil tank. Since the volume of the sealed oil tank cannot change, the inert gas can only be released by the energy storage bladder to meet the dynamic balance of the sealed oil tank volume. Through the hydraulic pipeline and hydraulic valve group, pressure (27MPa) is provided to the oil cylinder, causing the oil cylinder to move up and down to complete the bending action. The oil returns to the oil tank through the filling pipe. The energy storage bladder recovers the inert gas to complete the entire bending process.

[0020] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dynamic compensation system for gas in a sealed oil tank based on an energy storage bladder for a bending machine, comprising a chamber (1), an oil cylinder (6), and a hydraulic valve assembly (7), wherein the oil cylinder (6) is equipped with the hydraulic valve assembly (7), characterized in that: The cabin is divided into a pump assembly compartment (10), a sealed oil tank (11), and an airbag compartment by a partition. The pump assembly compartment (10) is equipped with a motor pump assembly (9). The motor pump assembly (9) is connected to the hydraulic valve assembly (7) and the sealed oil tank (11) respectively through hydraulic pipelines (8). The airbag compartment is equipped with an energy storage airbag (12). The airbag's pipeline extends to the upper part of the oil tank. The oil cylinder (6) is connected to a filling pipe (5), which extends into the oil tank.

2. The dynamic compensation system for gas in a sealed oil tank based on an energy storage bladder for a bending machine according to claim 1, characterized in that: The sealed oil tank (11) is provided with an oil inlet (3), and a sealing cap is installed at the oil inlet (3).

3. The dynamic compensation system for gas in a sealed oil tank based on an energy storage bladder for a bending machine according to claim 1, characterized in that: The airbag compartment is equipped with an inspection cover (4).

4. The dynamic compensation system for gas in a sealed oil tank based on an energy storage bladder for a bending machine according to claim 1, characterized in that: The pump compartment (10) is equipped with a hatch cover (2).

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