Oil supplementing device for rotary motor of large hydraulic excavator

Abstract

The utility model discloses an oil recharging device for a rotary motor of a large hydraulic excavator, which comprises a controller, the controller is respectively and electrically connected with the rotary motor and a rotary oil supply pump, the rotary oil supply pump is connected with the rotary motor through an oil supply pipeline, and the rotary oil supply pump is provided with a rotary port A and a rotary port B. The oil recharging device is characterized in that the rotary port A is provided with a first pressure sensor; a second pressure sensor is arranged at the rotary port B. The oil supply pipeline is connected with a first oil supplementing pipeline which is connected with a first oil supply pump through a first proportional valve, and a third pressure sensor is arranged on the first oil supplementing pipeline close to the joint of the oil supply pipeline. The first pressure sensor, the second pressure sensor and the third pressure sensor are all electrically connected with the controller, the first oil recharging pump and the rotary oil supply pump are connected with a hydraulic system of the excavator, and the functions of improving oil recharging control precision, preventing cavitation erosion, being high in corresponding speed and improving working efficiency are achieved.

Description

TECHNICAL FIELD

[0001] The utility model application relates to learning desk technical field, specifically is a large -scale hydraulic excavator rotation motor oil supplement device. BACKGROUND

[0002] The excavator, also known as excavating machinery, also known as the excavator, is a kind of earthwork machinery for excavating materials above or below the support surface with a shovel and loading into transport vehicles or unloading to the stockyard, large hydraulic excavators play an important role in engineering construction, and the rotation motor as one of the key components needs good oil supplement control to ensure normal operation, to prolong the service life of the rotation motor and reduce equipment cost, at present, the existing rotation motor oil supplement control method has the problems of insufficient control precision, slow response speed and the like.

[0003] Therefore, the device for improving oil supplement control precision, preventing cavitation, corresponding speed and improving work efficiency is designed to solve the problems of the inventor. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiencies of the prior art, the utility model aims at providing a large -scale hydraulic excavator rotation motor oil supplement device, which can realize the functions of improving oil supplement control precision, preventing cavitation, corresponding speed and improving work efficiency.

[0005] The utility model discloses the technical scheme adopted by the device is: a large -scale hydraulic excavator rotation motor oil supplement device, including the controller, the controller is electrically connected with rotation motor, rotation oil supply pump respectively, rotation oil supply pump is connected with rotation motor through oil supply pipeline, rotation oil supply pump is provided with rotation A, rotation B, rotation A is provided with first pressure sensor, rotation B is provided with second pressure sensor, oil supply pipeline is connected with first oil supplement pipeline, first oil supplement pipeline is connected with first oil supply pump through first proportional valve, third pressure sensor is arranged on first oil supplement pipeline near the oil supply pipeline joint, first pressure sensor, second pressure sensor, third pressure sensor all are electrically connected with the controller, and first oil supplement pump, rotation oil supply pump are connected with the hydraulic system of excavator.

[0006] Further, the end of the first oil supplement pipeline is connected with the second oil supplement pump through the second proportional valve.

[0007] Further, the second proportional valve and the second oil supplement pump are electrically connected with the controller.

[0008] Further, the output end of the second oil supplement pump is connected with the second oil supplement pipeline, and the end of the second oil supplement pipeline is connected with the front oil tank.

[0009] Further, the front oil tank is provided with a booster pump, and the outlet end of the front oil tank is connected with the first oil supplement pipeline through a pipeline.

[0010] Further, the booster pump and the fourth pressure sensor are electrically connected with the controller.

[0011] Further, the second oil supplement pump is connected with the hydraulic system of the excavator.

[0012] The device has the following beneficial effects:

[0013] 1. The device uses an electromagnetic proportional valve, a pressure sensor and a double oil supplement pump to monitor the rotary motor in real time and supplement oil in time according to the need, thereby realizing the functions of improving the oil supplement control precision, preventing cavitation, increasing the speed and improving the work efficiency.

[0014] 2. The device uses a built-in booster pump in the front oil tank to provide a small amount of oil supplement operation near the rotary motor, thereby realizing the functions of further improving the response speed and improving the oil supplement efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural view of the device.

[0016] The reference signs are explained as follows: 1 - controller; 2 - rotary motor; 3 - rotary A port; 4 - rotary B port; 5 - first pressure sensor; 6 - second pressure sensor; 7 - rotary oil supply pump; 8 - oil supply pipeline; 9 - first oil supplement pump; 10 - first proportional valve; 11 - first oil supplement pipeline; 12 - third pressure sensor; 13 - second oil supplement pump; 14 - second proportional valve; 15 - second oil supplement pipeline; 16 - fourth pressure sensor; 17 - front oil tank. DETAILED DESCRIPTION

[0017] The device will be further described below in combination with specific embodiments, and the embodiments are only used for illustrating the device and not for limiting the scope of the device. In addition, it should be understood that, after reading the content of the device, those skilled in the art can make various changes or modifications to the device, and these equivalent forms also fall within the scope defined by the appended claims.

[0018] Embodiment one: refer to Figure 1The utility model discloses a structure view, a large -scale hydraulic excavator rotary motor 2 oil supplement device, including controller 1, controller 1 is electrically connected with rotary motor 2, rotary oil feed pump 7 respectively, and rotary oil feed pump 7 is connected with rotary motor 2 through oil supply pipeline 8, and rotary oil feed pump 7 is provided with rotary A 3, rotary B 4, and rotary A 3, rotary B 4 are the oil inlet, oil return of rotary motor 2 respectively, and rotary A 3 is provided with first pressure sensor 5, and rotary B 4 is provided with second pressure sensor 6, and the pressure of oil inlet and oil return is monitored in real time through two pressure sensors, monitors its working condition, and oil supply pipeline 8 is connected with first oil supplement pipeline 11, and first oil supplement pipeline 11 is connected with first oil feed pump through first proportional valve 10, and first oil supplement pipeline 11 is provided with third pressure sensor 12 close to the joint with oil supply pipeline 8, and third pressure sensor 12 detects the pressure of oil supplementing port in real time, and controller 1 adopts specific control algorithm according to the parameter of pressure sensor feedback, judges whether the oil supplementing operation needs to be carried out, and controls oil supplementing pump, proportional valve to carry out corresponding oil supplementing action, and controller 1 adopts programmable logic controller 1, has high speed operation and accurate control ability, and the control algorithm determines the best oil supplementing time and oil supplementing amount according to rotary motor 2 working pressure and oil supplementing pressure size, and first pressure sensor 5, second pressure sensor 6, third pressure sensor 12 are electrically connected with controller 1, and first oil feed pump 9, rotary oil feed pump 7 are connected with the hydraulic system of excavator, and oil supplementing pump controls oil supplementing pump, proportional valve to realize control oil supplementing amount according to the instruction of controller 1, to satisfy the demand of rotary motor 2, and proportional valve adopts high -performance electromagnetic proportional valve, can accurately control oil supplementing amount, and the opening and closing of oil supplementing pump are controlled by controller 1, and respond quickly according to actual demand.

[0019] In order to further accelerate the corresponding speed of oil supplementing, and correct the oil pressure, the end of the first oil supplement pipeline 11 is connected with the second oil supplement pump 13 through the second proportional valve 14, the second proportional valve 14 and the second oil supplement pump 13 are electrically connected with the controller 1, the output end of the second oil supplement pump 13 is connected with the second oil supplement pipeline 15, and the end of the second oil supplement pipeline 15 is connected with the front oil tank 17. The inside of the front oil tank 17 is provided with a booster pump, and the outlet end of the front oil tank 17 is connected with the first oil supplement pipeline 11 through a pipeline. The inside of the front oil tank 17 is provided with the fourth pressure sensor 16, and the booster pump and the fourth pressure sensor 16 are electrically connected with the controller 1. The second oil supplement pump 13 is connected with the hydraulic system of the excavator.

[0020] The pipeline joints in the utility model are connected by electromagnetic valves.

[0021] The second oil supplement pump 13 and the first oil supplement pump 9 supplement oil at the same time, which can improve the efficiency of oil supplementing.

[0022] Meanwhile, the switching of the oil supplement pump usage state can be performed, and the first oil supplement pump 9 is used alone, the second oil supplement pump 13 is used alone, and the two oil supplement pumps are used simultaneously in multiple modes.

[0023] The front oil tank 17 can be used in a selected state, and when the front oil tank 17 is not used, it can be used as a section of pipeline to transport hydraulic oil; when the front oil tank 17 is used, the hydraulic oil can be temporarily stored in the front oil tank, and when the amount of oil supplement required by the rotary motor 2 is small, the oil supplement can be directly performed from the internal pressure of the front oil tank 17, and the response speed is extremely fast.

[0024] The utility model discloses a rotary motor 2 is monitored in real time to the electromagnetic proportional valve, pressure sensor, double oil supplement pump and timely oil supplement according to need, has realized the function of improving oil supplement control precision anticavitation, corresponding speed fast improvement work efficiency, adopts the built-in pressure pump of front oil tank 17, provides small oil supplement operation in the part close to rotary motor 2, has realized the function of further improving response speed, improvement oil supplement efficiency.

Claims

1. A large hydraulic excavator slewing motor oil supplementing device, comprising a controller (1), the controller (1) is electrically connected with a slewing motor (2) and a slewing oil supply pump (7) respectively, the slewing oil supply pump (7) is connected with the slewing motor (2) through an oil supply pipeline (8), the slewing oil supply pump (7) is provided with a slewing A port (3) and a slewing B port (4), characterized in that: The rotary A port (3) is provided with a first pressure sensor (5), the rotary B port (4) is provided with a second pressure sensor (6), the oil supply pipeline (8) is connected with a first oil supplement pipeline (11), the first oil supplement pipeline (11) is connected with a first oil supply pump through a first proportional valve (10), a third pressure sensor (12) is arranged on the first oil supplement pipeline (11) close to the joint with the oil supply pipeline (8), the first pressure sensor (5), the second pressure sensor (6) and the third pressure sensor (12) are electrically connected with a controller (1), the first oil supplement pump (9) and the rotary oil supply pump (7) are connected with the hydraulic system of the excavator.

2. The large hydraulic excavator swing motor oil supplementing device according to claim 1, characterized by: The end of the first oil supplement pipeline (11) is connected with a second oil supplement pump (13) through a second proportional valve (14).

3. The large hydraulic excavator swing motor oil supplementing device according to claim 2, characterized by: The second proportional valve (14) and the second oil supplement pump (13) are electrically connected with the controller (1).

4. The large hydraulic excavator swing motor oil supplementing device according to claim 2, characterized by: The output end of the second oil supplement pump (13) is connected with a second oil supplement pipeline (15), and the end of the second oil supplement pipeline (15) is connected with a front oil tank (17).

5. A large hydraulic excavator swing motor oil replenishing device according to claim 4, characterized by: A booster pump is arranged on the inner side of the front oil tank (17), and the outlet end of the front oil tank (17) is connected with the first oil supplement pipeline (11) through a pipeline, and a fourth pressure sensor (16) is arranged on the inner side of the front oil tank (17).

6. A large hydraulic excavator swing motor oil replenishing device according to claim 5, characterized by: The booster pump and the fourth pressure sensor (16) are electrically connected with the controller (1).

7. The large hydraulic excavator swing motor oil supplementing device according to claim 2, characterized by: The second oil supplement pump (13) is connected with the hydraulic system of the excavator.

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