CN220869752U - Supercharging type hydraulic oil tank and supercharging system - Google Patents

Abstract

The utility model provides a pressurizing type hydraulic oil tank, which comprises a first oil tank and a second oil tank, wherein the second oil tank is arranged in the first oil tank; the second oil tank is provided with a second one-way valve for exhausting; the first oil tank is provided with a first oil outlet and a first oil inlet; the second oil tank is provided with a second oil outlet and a second oil inlet; the first oil outlet is connected with the second oil inlet through a booster pump, and the second oil outlet is connected with the first oil inlet through a variable pump; the second oil inlet flow is greater than the second oil outlet flow. The utility model further provides a pressurizing system adopting the pressurizing type hydraulic oil tank. The utility model can reduce the air content in the hydraulic oil, so as to ensure the cleanliness of the hydraulic oil, shorten the response time of the hydraulic element in the hydraulic system and ensure that the hydraulic system is more stable; meanwhile, cavitation of the hydraulic element is reduced, and the service life of the hydraulic element is prolonged.

Description

Supercharging type hydraulic oil tank and supercharging system

Technical Field

The utility model relates to the field of hydraulic systems of engineering machinery vehicles, in particular to a pressurizing type hydraulic oil tank and a pressurizing system.

Background

The hydraulic oil tank is used as a power source spring of the hydraulic system and plays a key role in the reliability of the hydraulic system. The main uses of the hydraulic oil tank include the functions of storing hydraulic oil, dissipating heat of a hydraulic system, escaping air, precipitating impurities and separating water. The hydraulic oil tank is applied to the working conditions that the air pressure is low, the dust is large and the self-priming capacity of the pump cannot meet the requirements, and the pressurizing type hydraulic oil tank is needed.

However, the conventional pressurized hydraulic oil tank generally adopts a pressurized hydraulic oil tank, and the air content in the oil is easily increased by adopting the hydraulic oil tank, so that the compressibility of the hydraulic oil in the oil tank is increased, the response time of a hydraulic element is prolonged, and meanwhile, the cavitation phenomenon is easily generated on the surface of the hydraulic element, so that the service life of the hydraulic element is shortened.

In addition, other pressurization type hydraulic oil tank connection structures and logic control are too complex, so that the manufacturing cost of the oil tank is high, and the reliability of the oil tank is low due to the complex structure and logic.

Disclosure of utility model

In view of the above-mentioned drawbacks of the prior art, the present utility model is directed to a pressurized hydraulic tank and a pressurizing system.

The utility model provides a pressurized hydraulic oil tank, which comprises a first oil tank and a second oil tank, wherein the second oil tank is arranged in the first oil tank; the second oil tank is provided with a second one-way valve for exhausting; the first oil tank is provided with a first oil outlet and a first oil inlet; the second oil tank is provided with a second oil outlet and a second oil inlet; the first oil outlet is connected with the second oil inlet through a booster pump, and the second oil outlet is connected with the first oil inlet through a variable pump, so that the flow rate of the second oil inlet is larger than that of the second oil outlet.

Preferably, the bottom of the second oil tank is provided with a first one-way valve for supplementing oil.

Preferably, a sequence valve for balancing the internal pressure of the second oil tank is arranged on the side wall of the second oil tank, and the sequence valve is lower than the liquid level of the hydraulic oil in the second oil tank.

Preferably, a first opening is formed in the top of the first oil tank, the second oil tank is arranged in the first oil tank along the first opening, a second opening is formed in the top of the second oil tank, and the second opening coincides with the first opening; and the second opening is provided with a fuel tank cover.

Preferably, the first oil tank is provided with a liquid level gauge for observing the hydraulic oil level and displaying the temperature of the first oil tank.

Preferably, an oil drain valve is arranged on the side wall of the first oil tank, and the oil drain valve is close to the bottom of the first oil tank.

The pressurizing system adopting the pressurizing type hydraulic oil tank comprises the pressurizing type hydraulic oil tank, a pressurizing pump, a variable pump and a hydraulic system, wherein the pressurizing type hydraulic oil tank comprises a first oil tank and a second oil tank, a second oil outlet of the second oil tank is connected with the variable pump, the variable pump is connected with the hydraulic system, and the hydraulic system is connected with a first oil inlet of the first oil tank; the first oil outlet of the first oil tank is connected with the booster pump, and the booster pump is connected with the second oil inlet of the second oil tank.

Preferably, the first oil tank is provided with a third oil outlet, and the third oil outlet is connected with the variable pump.

Preferably, a filter is arranged between the booster pump and the second oil tank.

As described above, the pressurizing hydraulic oil tank and the pressurizing system related to the utility model have the following beneficial effects:

According to the utility model, the second oil tank is arranged in the first oil tank, the first one-way valve is arranged at the bottom of the second mailbox, and the second oil tank is filled with oil to ensure that the second oil tank can build pressure; the first oil tank is filled with oil through the air filter, and can reduce gas exchange between the hydraulic system and the outside; the first oil outlet of the first oil tank is connected with a booster pump, and the booster pump is connected with the second oil inlet of the second oil tank; the second oil outlet of the second oil tank is connected with a variable pump, and then the variable pump is connected with a hydraulic system which is connected with the oil inlet of the first oil tank. The hydraulic oil in the first oil tank flows through the booster pump through the first oil outlet to be pressurized, the pressurized hydraulic oil enters the second oil tank through the second oil inlet, the hydraulic oil in the second oil tank flows through the variable pump through the second oil outlet, the variable pump conveys the hydraulic oil to the hydraulic system for use, the hydraulic oil in the hydraulic system flows into the first oil tank through the first oil inlet, the flow of the booster pump is larger than the variable pump, so that the flow of the second oil inlet is larger than the flow of the second oil outlet, and the hydraulic oil is circulated among the first oil tank, the second oil tank and the hydraulic system. The utility model can reduce the air content in the hydraulic oil, so as to ensure the cleanliness of the hydraulic oil, shorten the response time of the hydraulic element in the hydraulic system and ensure that the hydraulic system is more stable; meanwhile, cavitation of the hydraulic element is reduced, and the service life of the hydraulic element is prolonged.

Drawings

Fig. 1 is a schematic diagram of a booster hydraulic oil tank according to an embodiment of the present utility model.

Fig. 2 is a schematic diagram of a supercharging system according to an embodiment of the present utility model.

Reference numerals illustrate:

100. A first oil tank; 110. a first oil outlet; 120. a first oil inlet; 130. a first opening; 140. a third oil outlet; 200. a second oil tank; 210. a second oil inlet; 220. a second oil outlet; 230. a sequence valve; 240. a second one-way valve; 250. a second opening; 251. a fuel tank cap; 260. a first one-way valve; 300. an air cleaner; 400. a booster pump; 500. a variable displacement pump; 600. a liquid level gauge; 700. an oil drain valve; 800. a hydraulic system; 900. and (3) a filter.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.

See fig. 1-2. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are not intended to be critical to the essential characteristics of the utility model, but are intended to fall within the spirit and scope of the utility model. Also, the terms such as "upper", "lower", "left", "right", "middle", and the like are used herein for descriptive purposes only and are not intended to limit the scope of the utility model for which the utility model may be practiced or for which the relative relationships may be altered or modified without materially altering the technical context.

As shown in fig. 1 to 2, a pressurized hydraulic oil tank includes a first oil tank 100 and a second oil tank 200, wherein the second oil tank 200 is disposed in the first oil tank 100, the top of the second oil tank 200 is attached to the top of the first oil tank 100, and an oil filler is disposed at the attachment; the first fuel tank 100 is provided with an air cleaner 300 for refueling and reducing gas exchange; the bottom of the second tank 200 is provided with a first check valve 260 for supplementing oil. The second one-way valve 240 is arranged on the side wall of the second oil tank 200, and the second one-way valve 240 is higher than the liquid level of the hydraulic oil in the second oil tank 200. Wherein the second check valve 240 has a cracking pressure of 0.5bar. The first oil tank 100 is provided with a first oil outlet 110 and a first oil inlet 120, and the first oil outlet 110 is lower than the first oil inlet 120; the second oil tank 200 is provided with a second oil outlet 220 and a second oil inlet 210, and the second oil outlet 220 is lower than the second oil inlet 210; the first oil outlet 110 is connected with the booster pump 400 through an oil pipe, and the booster pump 400 is connected with the second oil inlet 210 through an oil pipe; the second oil inlet 220 is connected with the variable pump 500 through an oil pipe, and the variable pump 500 is connected with the first oil inlet 120 through an oil pipe, so that the flow rate of the second oil inlet 210 is larger than that of the second oil outlet 220.

Specifically, the air cleaner 300 may be a PAF-series pre-compression air cleaner, which is required to be used with construction machines, vehicles, mobile machines, and hydraulic system oil tanks that are required to have pressure. The air cleaner 300 includes an air filter, an air intake check valve, an air exhaust check valve, and a fuel filling filter, further simplifying the structure of the pressurized hydraulic tank, and improving the purifying efficiency of hydraulic oil. The air cleaner 300 can maintain a predetermined pressure in the first oil tank 100, maintain a stable hydraulic oil in the first oil tank 100, and avoid a malfunction such as a suction pump due to oscillation of the hydraulic oil in the first oil tank 100.

In use, the lid of the air cleaner 300 is first opened, pressurized oil is supplied to the first tank 100 by the fuel dispenser through the filter screen of the air cleaner 300 until the liquid level reaches a predetermined position, the refueling is stopped, and the lid of the air cleaner 300 is closed. And then hydraulic oil is added into the second oil tank 200 through the oil filling port at the top of the first oil tank 100 until the liquid level reaches a preset position, and the oil filling is stopped. The first check valve 260 is vertically installed at the bottom of the second tank 200, and can continuously supplement the hydraulic oil to the second tank 200 until the pressure is formed inside the second tank 200 before the pressure is not established in the second tank 200, and stop the oil supplement. When the hydraulic oil pump is started, the hydraulic oil in the first oil tank 100 is sucked from the first oil outlet 120 through the booster pump 400, and the pressurized hydraulic oil flows into the second oil inlet 210 to the second oil tank 200 through the oil pipe. The hydraulic oil in the second oil tank 200 is sucked from the second oil outlet 220 by the variable pump 500, and is delivered to a hydraulic system to be used by the variable pump 500, and flows back to the first oil tank 100 through the hydraulic system. It should be noted that, the flow rate of the booster pump 400 is slightly greater than the flow rate of the variable pump 500, so that the flow rate of the second oil inlet 210 is greater than the flow rate of the second oil outlet 220, which results in the rising of the hydraulic oil level in the second oil tank 200, so that the air in the second oil tank 200 is extruded to the top of the second oil tank 200, and the pressure in the second oil tank 200 continuously increases. When the pressure in the second tank 200 increases to 0.5bar, the second check valve 240 is opened so that the air at the top of the second tank 200 is discharged into the first tank 100 through the second check valve 240. When the hydraulic oil in the second hydraulic oil tank 200 fills the entire second hydraulic oil tank, the hydraulic oil may be discharged into the first oil tank 100 through the second check valve 240. Thereby ensuring that the hydraulic oil can circulate in the first tank 100, the second tank 200, and the hydraulic system, and improving the self-priming capability of the booster pump 400 and the variable displacement pump 500.

When the liquid level of the hydraulic oil flowing back into the first oil tank 100 after circulation rises, the temperature of the hydraulic oil also rises, and oil mist is generated and the pressure in the first oil tank 100 is increased. When the pressure in the first tank 100 is greater than the predetermined pressure, the air may be discharged to the outside of the first tank 100 through the air cleaner 300 until the pressure in the first tank 100 is equal to the predetermined pressure, and the air discharge may be stopped.

Further, as shown in fig. 1, a sequence valve 230 for balancing the internal pressure of the second tank 200 is provided on the side wall of the second tank 200, and the sequence valve 230 is lower than the hydraulic oil level in the second tank 200. Wherein the sequence valve 230 is opened at a pressure of 1bar.

In use, when the pressure in the second tank 200 continues to rise after the hydraulic oil fills the second tank 100, the sequence valve 230 opens when the pressure in the second tank 200 reaches 1 bar. At this time, hydraulic oil may be discharged from the second tank 200 into the first tank 100 through the sequence valve 230 and the second check valve 240 to ensure that the pressure inside the second tank 200 is balanced.

It should be noted that, when the second tank 200 fails due to a decrease in the volume rate of use or the like after long-term use, the booster pump 400 cannot exceed the flow rate of the variable pump 500, and at this time, the pressure in the second tank 200 cannot reach the opening pressure of the second check valve 240, and cannot reach the set pressure of the sequence valve 230. At this time, the hydraulic oil is continuously supplied from the first tank 100 to the second tank 200 through the first check valve 260 to ensure that the hydraulic system operates normally.

Further, a first opening 130 is formed at the top of the first oil tank 100, the second oil tank 100 is placed in the first oil tank 100 along the first opening 130, a second opening 250 is formed at the top of the second oil tank 200, and the second opening 250 coincides with the first opening 130; a fuel tank cap 251 is provided at the second opening 250.

In particular, the tank cap 251 is provided with a manhole cover for cleaning the second tank 200 on the one hand, for mounting the second check valve 240 on the other hand, and for venting the second tank 200 when a malfunction occurs.

Further, a level gauge 600 is provided on the first tank 100 for observing the hydraulic oil level and displaying the temperature of the first tank 100.

Further, the side wall of the first oil tank 100 is provided with an oil drain valve 700, and the oil drain valve 700 is close to the bottom of the first oil tank 100, and is used for draining oil from the first oil tank 100 when needed.

As shown in fig. 2, a pressurization system using the pressurization type hydraulic oil tank includes a pressurization type hydraulic oil tank, a booster pump 400, a variable pump 500 and a hydraulic system 500, wherein the pressurization type hydraulic oil tank includes a first oil tank 100 and a second oil tank 200, a second oil outlet 220 of the second oil tank 200 is connected with the variable pump 500, the variable pump 500 is connected with the hydraulic system 800, and the hydraulic system 800 is connected with a first oil inlet 120 of the first oil tank 100; the first oil outlet 110 of the first oil tank 100 is connected to the booster pump 400, and the booster pump 400 is connected to the second oil inlet 210 of the second oil tank 200. The pressurizing system can reduce the air content in the hydraulic oil so as to ensure the cleanliness of the hydraulic oil, shorten the response time of the hydraulic element in the hydraulic system and ensure that the hydraulic system is more stable.

When in use, through the suction of the booster pump 400, the hydraulic oil in the first oil tank 100 flows into the booster pump 400 and the second oil inlet 210 from the first oil outlet 110 through the oil pipe in sequence and flows into the second oil tank. The hydraulic oil in the second oil tank 200 flows into the variable pump 500 from the second oil outlet 220 through the oil pipe under the action of the variable pump 500, and is delivered into the hydraulic system 800 by the variable pump 500, so as to provide the hydraulic system with hydraulic oil, thereby ensuring smooth operation of the hydraulic system. Hydraulic oil delivered into the hydraulic system flows into the first oil tank 100 through the first oil inlet 120 to form a hydraulic oil circulation. When the liquid level and the temperature of the hydraulic oil in the first oil tank 100 are increased due to the backflow hydraulic oil, the first oil tank 100 exhausts the outside of the oil tank to maintain the normal operation of the hydraulic system 800, and cavitation phenomenon can occur on the low-pressure hydraulic element, so that the service lives of the hydraulic oil and the hydraulic element are prolonged.

Further, as shown in fig. 2, the first oil tank 100 is provided with a third oil outlet 140, and the third oil outlet 140 is connected to a variable displacement pump 500. Under the action of the variable pump 500, the hydraulic oil in the first oil tank 100 flows into the variable pump through the third oil outlet 140, so that the hydraulic oil flowing out of the first oil tank 100 flows into the hydraulic system 800 together with the hydraulic oil flowing out of the second oil tank 200, and can flow back into the first oil tank 100 through the hydraulic system 800.

Further, as shown in fig. 2, a filter 900 is provided between the booster pump 400 and the second tank 200, so that the cleanliness of the hydraulic oil in the second tank 200 can be ensured. Wherein, the filter 900 is further provided with a bypass check valve, and when the filter core of the filter 900 is blocked, hydraulic oil can flow into the second hydraulic oil tank 200 through the bypass check valve, so that the use of the hydraulic system 800 is not affected.

In summary, the utility model can reduce the air content in the hydraulic oil, so as to ensure the cleanliness of the hydraulic oil, shorten the response time of the hydraulic element in the hydraulic system and ensure the hydraulic system to be more stable; meanwhile, cavitation of the hydraulic element is reduced, and the service life of the hydraulic element is prolonged.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (9)

1. A pressurized hydraulic tank, characterized by comprising a first tank (100) and a second tank (200), said second tank (200) being arranged inside said first tank (100); a second one-way valve (240) for exhausting is arranged on the second oil tank (200); the first oil tank (100) is provided with a first oil outlet (110) and a first oil inlet (120); the second oil tank (200) is provided with a second oil outlet (220) and a second oil inlet (210); the first oil outlet (110) is connected with the second oil inlet (210) through a booster pump (400), and the second oil outlet (220) is connected with the first oil inlet (120) through a variable pump (500), so that the flow rate of the second oil inlet (210) is larger than that of the second oil outlet (220).

2. The pressurized hydraulic oil tank according to claim 1, wherein a first check valve (260) for supplementing oil is provided at the bottom of the second oil tank (200).

3. The pressurized hydraulic oil tank according to claim 1 or 2, characterized in that a sequence valve (230) for balancing the internal pressure of the second oil tank (200) is provided on the side wall of the second oil tank (200), the sequence valve (230) being lower than the hydraulic oil level in the second oil tank (200).

4. The pressurized hydraulic oil tank according to claim 1, characterized in that a first opening (130) is provided at the top of the first oil tank (100), the second oil tank (200) is placed in the first oil tank (100) along the first opening (130), a second opening (250) is provided at the top of the second oil tank (200), and the second opening (250) coincides with the first opening (130); the second opening (250) is provided with a fuel tank cap (251).

5. The pressurized hydraulic tank according to claim 4, characterized in that said first tank (100) is provided with a level gauge (600) for observing the hydraulic oil level and displaying the temperature of said first tank (100).

6. The pressurized hydraulic oil tank according to claim 1, characterized in that an oil drain valve (700) is provided on a side wall of the first oil tank (100), and the oil drain valve (700) is close to a bottom of the first oil tank (100).

7. A supercharging system employing the supercharging hydraulic tank as claimed in claim 1, characterized by comprising a supercharging hydraulic tank, a booster pump (400), a variable displacement pump (500) and a hydraulic system (800), the supercharging hydraulic tank comprising a first tank (100) and a second tank (200), a second oil outlet (220) of the second tank (200) being connected to the variable displacement pump (500), the variable displacement pump (500) being connected to the hydraulic system (800), the hydraulic system (800) being connected to a first oil inlet (120) of the first tank (100); the first oil outlet (110) of the first oil tank (100) is connected with the booster pump (400), and the booster pump (400) is connected with the second oil inlet (210) of the second oil tank (200).

8. The supercharging system according to claim 7, characterized in that the first oil tank (100) is provided with a third oil outlet (140), the third oil outlet (140) being connected to the variable displacement pump (500).

9. Supercharging system according to claim 7 or 8, characterized in that a filter (900) is provided between the supercharging pump (400) and the second oil tank (200).