Energy system for hydraulic rotary table

Abstract

The utility model discloses an energy system for a hydraulic rotary table, which comprises a power unit, a control unit, an energy accumulator unit and an auxiliary unit, the auxiliary unit, the power unit, the control unit and the hydraulic rotary table are sequentially connected, the energy accumulator unit is connected with the power unit and the hydraulic rotary table through the control unit, and the energy accumulator unit is connected with the hydraulic rotary table through the control unit. The control unit is connected with the auxiliary unit, and the hydraulic rotary table is connected with the auxiliary unit. The control unit comprises a non-return one-way valve assembly arranged between the power unit and the energy accumulator unit. The inlet end of the pre-charging pressure valve is connected with the outlet end of the check one-way valve assembly, the outlet end of the pre-charging pressure valve is connected with the hydraulic rotary table, and pre-pressure between the energy system and the hydraulic rotary table is established; the inlet end of the confluence valve is connected with the outlet end of the energy accumulator unit, the outlet end of the confluence valve is connected with the inlet end of the hydraulic rotary table, and the hydraulic rotary table is prevented from being impacted by large-flow oil supply of the energy system; and the unloading valve is arranged on the outlet end side of the energy accumulator unit, the inlet end of the unloading valve is connected with the outlet end of the energy accumulator unit, and the unloading valve is used for controlling the oil body in the energy accumulator unit to flow back. Through the combined use of the check one-way valve assembly, the pre-charging pressure valve, the converging valve and the unloading valve, the requirements of liquid supply and emergency stop unloading of a new-generation hydraulic rotary table under the instantaneous working condition are met.

Description

Technical Field

[0001] The utility model relates to the field of testing, in particular to an energy system for a hydraulic turntable. Background Art

[0002] The energy system is a device that converts the mechanical energy of the motor into the power energy of the hydraulic oil. It can provide hydraulic oil with a certain flow and pressure output. It is composed of a main pump, oil tank, accumulator, valve block, pipeline, refrigerator and control cabinet. The hydraulic turntable is an electromechanical device that converts the power energy of the hydraulic oil into the mechanical energy of the hydraulic motor. The main actuators are servo valves, hydraulic motors and controllers. The hydraulic turntable is mainly used in semi-physical simulation experiments of weapons and equipment. If there is a high-speed instantaneous action condition, an instantaneous large flow is required. If there is an emergency stop, the pressure needs to be reduced instantly.

[0003] The prior art (CN203348183U) provides a high-precision simulation turntable hydraulic energy system. Under instantaneous working conditions, the main pump of the energy pump station is connected to the accumulator assembly through a one-way valve, and the pressure is adjusted by the overflow valve to directly supply oil. The maximum instantaneous flow rate is 1800L / min. In case of emergency load release, the load is directly released by the load release valve or the overflow valve. The prior art "Development of a Six-degree-of-freedom Turntable Hydraulic System" (author: Yu Wubin) uses four main pumps to merge, and is equipped with an electromagnetic reversing valve and a throttle valve to control the load release. Its maximum instantaneous flow rate is 1300L / min. The new generation of hydraulic turntables require an oil flow rate of 7000-10000L / min (21MPa) under instantaneous working conditions, which is much higher than the instantaneous flow rate of 800L / min-2000L / min (21MPa) of the existing energy system. In addition, during high-pressure emergency parking, according to the existing technology of valve group and pipeline unloading, the instantaneous return oil flow rate can reach 10000L / min-20000L / min, causing a sharp increase in the pressure in the oil tank, posing the risk of damaging the oil tank and pipeline. Therefore, under the existing hydraulic principle, by increasing the main pump displacement, oil tank volume, number of accumulators, valve block specifications, pipeline diameter, and refrigerator power, it is impossible to meet the use conditions of the new generation of hydraulic turntables, and innovative design from the hydraulic principle is required. Utility Model Content

[0004] The utility model aims to design a pre-charge pressure valve, a converging valve and a non-return one-way valve assembly on the oil supply pipeline, and a relief valve on the relief circuit, so as to meet the needs of instantaneous ultra-large flow and ultra-large relief of the hydraulic turntable in emergency parking by using pre-charge pressure and controllable relief return oil.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an energy system for a hydraulic turntable, comprising: a power unit, a control unit, an accumulator unit, and an auxiliary unit, wherein the auxiliary unit, the power unit, the control unit, and the hydraulic turntable are connected in sequence, the accumulator unit is connected to the power unit and the hydraulic turntable through the control unit, the control unit is respectively connected to the auxiliary unit, and the hydraulic turntable is connected to the auxiliary unit;

[0006] The control unit comprises:

[0007] a non-return one-way valve assembly, arranged between the power unit and the accumulator unit;

[0008] A pre-charge pressure valve, whose inlet end is connected to the outlet end of the non-return one-way valve assembly, and whose outlet end is connected to the hydraulic turntable, establishes a pre-pressure between the energy system and the hydraulic turntable, and provides an instantaneous high-flow high-pressure oil body for the hydraulic turntable;

[0009] A confluence valve, the inlet of which is connected to the outlet of the accumulator unit, and the outlet of which is connected to the inlet of the hydraulic turntable, to prevent the large flow of oil supplied by the energy system from impacting the hydraulic turntable;

[0010] The unloading valve is arranged at the outlet end side of the accumulator unit, and its inlet end is connected to the outlet end of the accumulator unit to control the reflux of the oil in the accumulator unit.

[0011] Optionally, the power unit includes a plurality of pump bodies.

[0012] Optionally, the non-return one-way valve assembly is composed of a plurality of one-way valves, and the inlet end of each one-way valve is connected to the outlet end of the corresponding pump body.

[0013] Optionally, the accumulator unit comprises at least two accumulator combinations connected in parallel, and the inlet end of the accumulator combination is connected to the non-return one-way valve assembly, and the outlet end is connected to the unloading valve and the combining valve respectively.

[0014] Optionally, the auxiliary unit includes an oil tank and a refrigerator, the oil tank is connected to each of the pump bodies, the unloading valve, and the hydraulic turntable through pipelines; the refrigerator is connected to the oil tank to control the temperature of the oil.

[0015] Optionally, a control cabinet is also included, which is respectively communicated with the pump body, the pre-charge pressure valve, the confluence valve, the unloading valve, and the refrigerator, and controls each component to execute instructions by sending instruction signals.

[0016] Optionally, the combined pipeline comprises:

[0017] The oil supply circuit is connected in sequence to the oil tank, the pump body, the non-return one-way valve assembly, the accumulator unit, the converging valve, and the hydraulic turntable;

[0018] An oil return circuit connecting the hydraulic turntable and the oil tank;

[0019] A pre-charge pressure circuit, which is sequentially connected to the non-return one-way valve assembly, the pre-charge pressure valve, and the hydraulic turntable;

[0020] The unloading circuit sequentially connects the accumulator unit, the unloading valve, and the oil tank.

[0021] Optionally, the pre-charge pressure valve is composed of a two-position, two-way solenoid valve with an adjustable damping orifice that is normally closed, the combining valve is composed of a combination valve with pilot pressure control, and the unloading valve is composed of a two-position, two-way solenoid valve with an adjustable damping orifice that is normally open.

[0022] Optionally, the energy system has an oil supply flow rate of 7000L / min-10000L / min under an instantaneous operating pressure of 21MPa, and a flow rate of 800L / min during emergency stop and load relief.

[0023] Compared with the prior art, the technical solution of the utility model has at least the following beneficial effects:

[0024] (1) A pre-charge pressure valve is used to establish pre-charge pressure between the hydraulic turntable and the energy system to provide the hydraulic turntable with instantaneous high-pressure oil with a large flow rate. A larger flow rate and pressure can be obtained by increasing the pipeline diameter, the number of accumulators, and the power of the refrigerator. This can meet the needs of the new generation of hydraulic turntables with a large flow rate of 7000L / min-10000L / min under instantaneous working conditions. At the same time, a confluence valve is set to prevent the large flow rate of the energy system from causing impact on the hydraulic turntable.

[0025] (2) Use the unloading valve to slow down the speed of oil return to avoid the impact of large-flow oil return from the energy system on the pipeline and oil tank, and use the check valve assembly to limit the flow direction of the oil so that it can only flow back to the oil tank slowly through the unloading circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the energy system for the hydraulic turntable of the utility model.

[0027] In the figure: 1-pre-charge pressure valve, 2-combination valve, 3-check valve assembly, 4-unloading valve, 5-pump body, 6-oil tank, 7-first accumulator combination, 8-second accumulator combination, 10-refrigeration machine, 11-control cabinet, 12-pre-charge pipeline, 13-main oil supply pipeline, 14-main oil return pipeline. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Figure 1 The schematic diagram of the energy system for the hydraulic turntable of the utility model comprises: a power unit, an accumulator unit, a control unit, an auxiliary unit, a control cabinet 11 and a combined pipeline. The two ends of the power unit are connected to the auxiliary unit and the control unit through a combined pipeline, the outlet end of the control unit is connected to the hydraulic turntable and the auxiliary unit through a combined pipeline, the accumulator unit is connected to the power unit and the hydraulic turntable through the control unit, the hydraulic turntable is connected to the auxiliary unit through a combined pipeline, the control cabinet 11 is connected to the power unit, the control unit and the auxiliary unit in communication, and the above-mentioned units are controlled to execute instructions by sending command signals to the power unit, the control unit and the auxiliary unit.

[0032] The power unit includes a plurality of pump bodies 5, which use a constant pressure variable main pump, which can quickly fill oil when underpressure and work with low power consumption when maintaining pressure, significantly reducing system heating. The pump body 5 can use a variable plunger main pump.

[0033] The accumulator unit includes at least two accumulator assemblies, which are connected to the power unit and the hydraulic turntable through a control unit, and can store enough oil to provide instantaneous high-pressure oil for the hydraulic turntable. In a preferred embodiment, two accumulator assemblies are used, namely a first accumulator assembly 7 and a second accumulator assembly 8. The inlet and outlet ends of the two accumulator assemblies are connected to the control unit, and the two accumulator assemblies are connected in parallel and serve as backup for each other. When one accumulator assembly fails, the other can continue to provide hydraulic driving force to avoid shutdown.

[0034] The auxiliary unit includes: an oil tank 6 and a refrigerator 10. The oil tank 6 is connected to the hydraulic turntable and connected to each pump body 5 through a pipeline to supply oil to each pump body 5. The refrigerator 10 is connected to the oil tank 6 and controls the system oil temperature through a heat exchange device.

[0035] like Figure 1 As shown, the control unit includes: a pre-charge pressure valve 1, a confluence valve 2, a check valve assembly 3 and a load relief valve 4. The check valve assembly 3 is arranged between the power unit and the accumulator unit, and is composed of a plurality of check valves. The inlet end of each check valve is connected to the outlet end of the corresponding pump body 5 to prevent the oil from flowing back to the oil tank 6 through the pipeline where the pump body 5 is located. The pre-charge pressure valve 1 is composed of a two-position two-way solenoid valve with an adjustable damping hole that is normally closed, and its inlet end is connected to the outlet end of the check valve assembly 3, and its outlet end is connected to the hydraulic turntable. By controlling the flow direction of the oil body and increasing the pipeline pressure, the pipeline is pre-charged, and the pre-pressure between the energy system and the hydraulic turntable is established, providing the hydraulic turntable with an instantaneous large flow and high-pressure oil body. The confluence valve 2 is composed of a combination valve with pilot pressure control, and its inlet end is connected to the outlet end of the accumulator unit, and the outlet end is connected to the inlet end of the hydraulic turntable. The opening of the fluid channel is adjusted by controlling the valve body opening, thereby changing the fluid flow rate to avoid the impact of the large flow oil supply of the energy system on the hydraulic turntable. The unloading valve 4 is composed of a two-position two-way solenoid valve with an adjustable damping hole that is normally open. The inlet end of the unloading valve 4 is connected to the outlet end of the accumulator combination, and its outlet end is connected to the oil tank 6. By changing the flow direction of the oil body and increasing the pipe resistance, the oil body in the accumulator unit is controlled to slowly flow back to the oil tank 6.

[0036] The control cabinet 11 includes a program import end and a control execution end. The user can set the opening and closing sequence of the pump body 5, the pre-charge pressure valve 1, the combining valve 2, the unloading valve 4 and the refrigerator 10 through programming, and import the control program into the control cabinet 11 through the program import end; and the control execution end controls each unit component to complete the program instructions, so as to realize the requirements of providing instantaneous ultra-large flow and emergency stop ultra-large unloading for the hydraulic turntable.

[0037] The combined pipeline connects the components in the power unit, accumulator unit, control unit and auxiliary unit together, and can meet the requirements of instantaneous large flow on the pipeline diameter size, which includes: oil supply circuit, oil return circuit, pre-charge pressure circuit and load relief circuit. The oil supply circuit connects the oil tank 6, pump body 5, non-return one-way valve assembly 3, accumulator combination, confluence valve 2 and hydraulic turntable in sequence through pipelines, wherein the oil supply circuit includes a main oil supply pipeline 13, which is used to connect the confluence valve 2 and the hydraulic turntable to avoid the impact of large flow oil supply on the hydraulic turntable. The oil return circuit includes a main return oil pipeline 14, which is used to connect the hydraulic turntable and the oil tank 6, and the oil in the hydraulic turntable flows back to the oil tank 6 through the main return oil pipeline 14. The pre-charge pressure circuit is to connect the non-return one-way valve assembly 3, the pre-charge pressure valve 1 and the hydraulic turntable in sequence through a pipeline, wherein the pre-charge pressure circuit includes a pre-charge pressure pipeline 12, which is used to connect the pre-charge pressure valve 1 and the hydraulic turntable to achieve pre-charge of the pipeline and maintenance of the pressure of the hydraulic turntable. The unloading circuit is to connect the accumulator assembly, the unloading valve 4 and the oil tank 6 in sequence through a pipeline to complete the reflux of the oil in the heat accumulator assembly.

[0038] When the energy system of the utility model is used for instantaneous ultra-large flow liquid supply, the control cabinet 11 controls the opening of the pump body 5 to enable the pump body 5 to draw oil from the oil tank 6, and at the same time controls the opening of the pre-charge pressure valve 1 to pre-pressurize the pipeline. When the oil pressure in the pipeline reaches the pre-charge pressure, the opening of the confluence valve 2 is controlled, and the oil drawn by the pump body 5 controls the flow direction of the oil through the non-return one-way valve assembly 3, enters the first accumulator combination 7 or the second accumulator combination 8, and then enters the hydraulic turntable after the flow is reduced by the confluence valve 2, providing the hydraulic turntable with instantaneous ultra-large flow oil. The oil supply flow rate of the energy system under instantaneous working conditions can reach 7000L / min-10000L / min (21MPa), which can meet the instantaneous oil supply working conditions of the new generation of hydraulic turntables. When the energy system of the utility model is used for emergency stop and load relief, the control cabinet 11 controls the pre-charge pressure valve 1 and the combining valve 2 to close, and controls the load relief valve 4 to open. Since the non-return one-way valve assembly is arranged on the pipeline where the pump body is located, the oil in the first accumulator combination 7 or the second accumulator combination 8 can only flow back to the oil tank 6 through the pipeline where the load relief valve 4 is located, and the emergency stop load relief flow rate is 800L / min.

[0039] When the energy system of the utility model supplies liquid at an instantaneous ultra-large flow rate, a larger flow rate and pressure can be obtained by increasing the pipeline diameter, the number of accumulators and the power of the refrigerator. The instantaneous flow rate and pressure of the output are obviously non-limiting. The coordinated use of the pre-charge pressure valve and the combining valve can avoid the impact of large-flow oil supply on the hydraulic turntable. When the emergency stop is performed to unload the load, the unloading valve is used to control the oil to slowly flow back to the oil tank, so as to avoid the impact of large-flow oil return from the energy system on the pipeline and the oil tank, thereby ensuring the safety of the energy system in the oil supply and emergency unloading states.

[0040] Embodiment 1

[0041] The present embodiment provides an energy system for a hydraulic turntable, comprising: a pump body 5, an accumulator unit, a control unit, an oil tank 6, a refrigerator 10, a control cabinet 11 and a combined pipeline.

[0042] The oil tank 6 is a large-sized oil tank to meet the liquid level drop caused by the oil storage of the accumulator unit. The length, width and height thereof are 2.5m, 1.5m and 1.8m respectively.

[0043] The pump body 5 is placed on the side of the oil tank 6. The pump body 5 uses a variable displacement piston pump with a displacement of 250 ml / r, a rated speed of 1480 r / min, and a pressure setting of 21 MPa.

[0044] There are two groups of accumulator units, namely a first accumulator combination 7 and a second accumulator combination 8. The two accumulator combinations are connected in parallel and serve as backup for each other. Each accumulator combination contains 8 accumulators with a specification of 50L, and each accumulator combination can store 400L of oil.

[0045] The refrigerator 10 is disposed on the top of the oil tank 6 and connected to the oil tank 6 to control the temperature of the oil.

[0046] The combined pipeline includes: an oil supply circuit, an oil return circuit, a pre-charge pressure circuit and a load relief circuit, so that various components of the energy system are connected together.

[0047] The control unit is arranged on the combined pipeline, and comprises: a pre-charge pressure valve 1, a confluence valve 2, a non-return one-way valve assembly 3 and a load relief valve 4, and controls the flow rate and flow direction of the oil body.

[0048] The control cabinet 11 is arranged on the other side of the oil tank 6, and a button switch and a screen are arranged on the surface thereof. The opening and closing of the pre-charge pressure valve 1, the confluence valve 2, the unloading valve 4, the pump body 5 and the refrigerator 10 can be controlled according to the internal program, so as to complete the instructions of the energy system to instantly provide flow and emergency stop unloading.

[0049] The energy system of this embodiment can provide an instantaneous maximum flow rate of 8000L / min (21MPa), which can meet the demand of 7000L / min-10000L / min (21MPa) of oil supply flow rate under instantaneous working conditions of the new generation of hydraulic turntable, far exceeding the instantaneous flow rate of 800L / min-2000L / min (21MPa) of existing energy systems; during emergency stop and load unloading, the instantaneous return oil flow rate can be controlled at 800L / min to avoid a large amount of oil return in a short period of time, which will cause a sharp increase in pressure in the oil tank and damage the oil tank.

[0050] To summarize, the energy system of the utility model utilizes a pre-charge pressure valve to pressurize the pipeline, provides an instantaneous large-flow high-pressure oil body for the hydraulic turntable, utilizes a combining valve to prevent the large-flow oil supply of the energy system from causing impact on the hydraulic turntable, utilizes a check valve assembly to limit the reflux path of the oil body, utilizes a relief valve to slow down the reflux speed of the oil body, and prevents the large-flow reflux of the energy system from causing impact on the pipeline and the oil tank; through the combined use of the check valve assembly, the pre-charge pressure valve, and the combining valve, the demand for a large flow of 7000L / min-10000L / min under instantaneous working conditions of the new generation of hydraulic turntables is met.

[0051] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. An energy system for a hydraulic turntable, characterized in that: include: A power unit, a control unit, an accumulator unit, and an auxiliary unit. The auxiliary unit, the power unit, the control unit, and the hydraulic turntable are connected in sequence. The accumulator unit is connected to the power unit and the hydraulic turntable through the control unit. The control unit is connected to the auxiliary unit respectively, and the hydraulic turntable is connected to the auxiliary unit. The control unit comprises: a non-return one-way valve assembly, arranged between the power unit and the accumulator unit; A pre-charge pressure valve, whose inlet end is connected to the outlet end of the non-return one-way valve assembly, and whose outlet end is connected to the hydraulic turntable, establishes a pre-pressure between the energy system and the hydraulic turntable, and provides an instantaneous high-flow high-pressure oil body for the hydraulic turntable; A confluence valve, the inlet of which is connected to the outlet of the accumulator unit, and the outlet of which is connected to the inlet of the hydraulic turntable, to prevent the large flow of oil supplied by the energy system from impacting the hydraulic turntable; The unloading valve is arranged at the outlet end side of the accumulator unit, and its inlet end is connected to the outlet end of the accumulator unit to control the reflux of the oil in the accumulator unit.

2. The energy system for a hydraulic turntable according to claim 1, characterized in that: The power unit comprises a plurality of pump bodies.

3. The energy system for the hydraulic turntable according to claim 2, characterized in that: The non-return one-way valve assembly is composed of a plurality of one-way valves, and the inlet end of each one-way valve is connected to the outlet end of the corresponding pump body.

4. The energy system for a hydraulic turntable according to claim 1, characterized in that: The accumulator unit comprises at least two accumulator assemblies connected in parallel, and the inlet end of the accumulator assembly is connected to the non-return one-way valve assembly, and the outlet end is connected to the unloading valve and the combining valve respectively.

5. The energy system for a hydraulic turntable according to claim 2, characterized in that: The auxiliary unit includes an oil tank and a refrigerator. The oil tank is connected to each of the pump bodies, the unloading valve, and the hydraulic turntable through pipelines. The refrigerator is connected to the oil tank to control the temperature of the oil.

6. The energy system for the hydraulic turntable according to claim 5, characterized in that: It also includes a control cabinet, which is respectively connected to the pump body, the pre-charge pressure valve, the confluence valve, the unloading valve, and the refrigerator for communication, and controls each component to execute instructions by sending instruction signals.

7. The energy system for a hydraulic turntable according to claim 5, characterized in that: Also includes: A combined pipeline, the combined pipeline comprising: The oil supply circuit is connected in sequence to the oil tank, the pump body, the non-return one-way valve assembly, the accumulator unit, the converging valve, and the hydraulic turntable; An oil return circuit connecting the hydraulic turntable and the oil tank; A pre-charge pressure circuit, which is sequentially connected to the non-return one-way valve assembly, the pre-charge pressure valve, and the hydraulic turntable; The unloading circuit sequentially connects the accumulator unit, the unloading valve, and the oil tank.

8. The energy system for a hydraulic turntable according to claim 1, characterized in that: The pre-charge pressure valve is composed of a two-position two-way solenoid valve with an adjustable damping hole that is normally closed, the confluence valve is composed of a combination valve with pilot pressure control, and the unloading valve is composed of a two-position two-way solenoid valve with an adjustable damping hole that is normally open.

9. The energy system for a hydraulic turntable according to claim 8, characterized in that: The energy system has an oil supply flow rate of 7000L / min-10000L / min under an instantaneous operating pressure of 21MPa, and a flow rate of 800L / min during emergency stop and load relief.

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