CN210003581U

CN210003581U - rolling brush driving hydraulic system and snow sweeper

Info

Publication number: CN210003581U
Application number: CN201920415478.9U
Authority: CN
Inventors: 盛积成; 李海军; 张立彬; 崔成龙; 李鹏冲
Original assignee: Weichai Power Co Ltd; Linde Hydraulics China Co Ltd
Current assignee: Weichai Power Co Ltd; Linde Hydraulics China Co Ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2020-01-31
Anticipated expiration: 2029-03-29

Abstract

The utility model relates to a hydraulic system technical field especially relates to kind of round brush drive hydraulic system and snow sweeper, and round brush drive hydraulic system includes motor, oil supplementing pump, variable pump and round brush motor, the oil supplementing pump with the variable pump jointly by motor drive, the oil inlet and the oil tank of oil supplementing pump are linked together, the oil-out of oil supplementing pump with the oil supplementing mouth of variable pump is linked together, the variable pump with the round brush motor forms closed return circuit, the round brush motor drives the round brush rotation, when the round brush is out of work, the sloping cam plate of variable pump is in the zero-bit, and the variable pump does not have flow output this moment, and the power of drive oil supplementing pump is less, has improved system efficiency, and energy-conserving effect is obvious, and when the round brush during operation, can control the rotational speed of round brush motor through the discharge capacity of adjustment variable pump, easily realize the speed regulation to the round brush motor to the operating mode adaptability of round brush motor has been improved.

Description

rolling brush driving hydraulic system and snow sweeper

Technical Field

The utility model relates to a hydraulic system technical field especially relates to kind of round brush drive hydraulic system and snow sweeper.

Background

The single-engine snow sweeper roller brush modified from the chassis of the heavy truck in China at present is driven by an open hydraulic system, a constant-pressure variable pump drives a motor through a control valve to drive the roller brush to rotate and sweep snow, and is widely applied to snow clearing operation of urban roads.

The defects that the roller brush drive adopts an open type hydraulic system are as follows: 1) the open system pump is a constant-pressure variable pump, when the system pressure does not reach a pressure cut-off set value of the pump, the displacement of the pump is always the maximum, and the speed adjustment of the rolling brush can only be realized by changing the working rotating speed of the engine, so that the speed of the motor is difficult to adjust, the change of the driving speed is brought, and the complexity of vehicle driving is increased; 2) the pressure loss of large-flow hydraulic oil passing through the control valve is large, when the motor continuously works at high speed, huge hydraulic power loss and heat are caused, a radiator with higher power is needed to ensure that a hydraulic system is not overheated, so the use economy of the system is poor, and higher requirements are provided for the heat dissipation of the system; 3) when the load of the motor is large and a high-speed working condition is not needed, the driving gear of the snow sweeper needs to be reduced, and the problem that the engine is not enough in power to cause the vehicle to be held back is avoided, so that the working condition adaptability of the system is poor.

Therefore, there is a need for kinds of rolling brush driving hydraulic systems and snow blowers to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide kinds of round brush drive hydraulic system and snow sweeper to solve among the prior art hydraulic loss that open hydraulic system exists big, the motor speed governing difficulty and the poor technical problem of operating mode adaptability.

To achieve the purpose, the utility model adopts the following technical proposal:

kind of round brush drive hydraulic system, including motor, oil supplementing pump, variable pump and round brush motor, the oil supplementing pump with the variable pump is by motor drive jointly, the oil inlet and the oil tank of oil supplementing pump are linked together, the oil-out of oil supplementing pump with the oil supplementing mouth of variable pump is linked together, the variable pump with the round brush motor forms closed return circuit, the round brush motor drives the round brush rotation.

As a preferable technical scheme of the rolling brush driving hydraulic system, the rolling brush driving hydraulic system further comprises a flushing valve, and the rolling brush motor is communicated with the oil tank through the flushing valve.

As the preferable technical scheme of the rolling brush driving hydraulic system, the rolling brush driving hydraulic system further comprises a radiator, and an inlet and an outlet of the radiator are communicated with the oil tank.

As a preferable technical scheme of the roller brush driving hydraulic system, an th bypass valve is connected in parallel between an inlet and an outlet of the radiator.

As a preferable technical scheme of the roller brush driving hydraulic system, the th bypass valve is a one-way valve.

As a preferable technical scheme of the rolling brush driving hydraulic system, the rolling brush driving hydraulic system further comprises a one-way valve, and the one-way valve is connected in parallel between an inlet and an outlet of the rolling brush motor.

As the preferred technical scheme of the rolling brush driving hydraulic system, a filter is arranged on a communicating pipeline between an oil outlet of the oil supplementing pump and an oil supplementing port of the variable displacement pump.

As a preferable technical scheme of the rolling brush driving hydraulic system, a second bypass valve is connected in parallel between an inlet and an outlet of the filter.

As a preferable technical scheme of the rolling brush driving hydraulic system, the second bypass valve is an overflow valve.

snow remover comprises a rolling brush driving hydraulic system in any scheme.

The utility model discloses compare in prior art's beneficial effect:

the utility model provides a round brush drive hydraulic system is closed hydraulic system, and when the round brush was out of work, the sloping cam plate of variable pump was in the zero-bit, and the variable pump did not have flow output this moment, and the hydraulic oil of moisturizing pump output only is used for replenishing hydraulic system's leakage, and the power of drive moisturizing pump is less, has improved system efficiency, and energy-conserving effect is obvious; when the rolling brush works, the swash plate of the variable pump is controlled to swing to the position required by the control signal through the oil supplementing pump to output hydraulic oil, the rotating speed of the rolling brush motor can be controlled by adjusting the discharge capacity of the variable pump, the speed of the rolling brush motor is easily adjusted, and the working condition adaptability of the rolling brush motor is improved.

Drawings

Fig. 1 is a schematic diagram of the hydraulic system for driving the rolling brush according to the present invention.

In the figure:

1-motor, 2-oil supplementing pump, 3-variable pump, 4-rolling brush motor, 5-variable control valve, 51- th electromagnetic valve, 52-second electromagnetic valve, 53-variable plunger, 6-flushing valve, 7-radiator, 71- th bypass valve, 8-one-way valve, 9-filter and 91-second bypass valve.

Detailed Description

The technical solution of the present invention will be further described with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the invention.

As shown in fig. 1, the utility model provides an kind of round brush drive hydraulic system, including motor 1, oil supply pump 2, variable pump 3 and round brush motor 4, oil supply pump 2 is driven by motor 1 with variable pump 3 jointly, oil inlet and the oil tank of oil supply pump 2 are linked together, the oil-out of oil supply pump 2 is linked together with the oil supply mouth of variable pump 3, the hydraulic oil of oil supply pump 2 output is used for providing the control oil of 3 discharge capacity changes of variable pump and supplementary hydraulic system and leaks, variable pump 3 forms the closed return circuit with round brush motor 4, the hydraulic oil drive round brush motor 4 work of variable pump 3 output, round brush motor 4 drives the round brush rotation in order to sweep snow work.

When the rolling brush does not work, the swash plate of the variable pump 3 is at a zero position, at the moment, the variable pump 3 does not output flow, hydraulic oil output by the oil supplementing pump 2 is only used for supplementing leakage of a hydraulic system, the power for driving the oil supplementing pump 2 is low, the system efficiency is improved, and the energy-saving effect is obvious; the round brush during operation, through the swash plate pendulum of the oil supply pump 2 control variable pump 3 to the position output hydraulic oil of control signal demand, can control the rotational speed of round brush motor 4 through the discharge capacity of adjustment variable pump 3, easily realize the speed control to round brush motor 4 to the operating mode adaptability of round brush motor 4 has been improved.

The variable pump 3 is integrated with a variable control valve 5, specifically, the variable control valve 5 comprises an th electromagnetic valve 51, a second electromagnetic valve 52 and a variable plunger 53, the th electromagnetic valve 51 is connected with the second electromagnetic valve 52 in parallel, inlets of the th electromagnetic valve 51 and the second electromagnetic valve 52 are both communicated with an outlet of the oil replenishing pump 2, outlets of the th electromagnetic valve 51 and the second electromagnetic valve 52 are respectively communicated with control ports on two sides of the variable plunger 53, the electromagnet of the th electromagnetic valve 51 or the second electromagnetic valve 52 is electrified to control the displacement of the variable pump 3, and the displacement is proportional to the current of the electromagnet of the th electromagnetic valve 51 or the second electromagnetic valve 52.

The rolling brush driving hydraulic system further comprises a flushing valve 6, the rolling brush motor 4 is communicated with an oil tank through the flushing valve 6, the flushing valve 6 is used for replacing hot oil in the rolling brush motor 4 and discharging air bubbles in the rolling brush motor 4, in the embodiment, the flushing valve 6 is a three-position three-way reversing valve, an oil outlet of the rolling brush motor 4 is communicated with an th control port and a th oil port of the three-position three-way reversing valve, an oil inlet of the rolling brush motor 4 is communicated with a second control port and a second oil port of the three-position three-way reversing valve, a third oil port of the three-position three-way reversing valve is communicated with the oil tank, and an overflow valve is arranged on a connecting pipeline of the flushing valve 6 and the oil tank in a step.

The rolling brush driving hydraulic system further comprises a radiator 7, an inlet and an outlet of the radiator 7 are communicated with an oil tank, oil temperature in the oil tank rises after hot oil replaced by the flushing valve 6 enters the oil tank, the radiator 7 is used for radiating the oil in the oil tank, steps are carried out, a th bypass valve 71 is connected between the inlet and the outlet of the radiator 7 in parallel, the bypass valve is used for opening when the blocking pressure of the radiator 7 reaches the opening pressure of the bypass valve, the radiator 7 is prevented from being blocked to cause suction of a pump, and optionally the th bypass valve 71 is a one-way valve.

The rolling brush driving hydraulic system further comprises a one-way valve 8, and the one-way valve 8 is connected between an oil inlet and an oil outlet of the rolling brush motor 4 in parallel. When the rolling brush motor 4 stops rotating, the rolling brush motor continues rotating under the action of inertia, the oil return side pressure of the rolling brush motor 4 is increased, the oil enters the oil inlet side of the rolling brush motor 4 by opening the check valve 8, and finally the rolling brush motor 4 stops rotating slowly by means of internal friction, so that the function of reducing the braking impact of the rolling brush is achieved.

In addition, a filter 9 is further arranged on a connecting pipeline between an oil outlet of the oil replenishing pump 2 and an oil replenishing port of the variable displacement pump 3 and used for filtering impurities in hydraulic oil, and step , a second bypass valve 91 is connected in parallel between an inlet and an outlet of the filter 9 and has the function of opening when the blocking pressure of the filter 9 reaches the opening pressure of the bypass valve, so that the filter 9 is prevented from being blocked to cause suction of the pump, and optionally, the second bypass valve 91 is an overflow valve.

The utility model discloses still provide kind snow blowers, the round brush drive hydraulic system in the above-mentioned scheme.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

The rolling brush driving hydraulic system is characterized by comprising a motor (1), an oil supplementing pump (2), a variable pump (3) and a rolling brush motor (4), wherein the oil supplementing pump (2) and the variable pump (3) are driven by the motor (1) together, an oil inlet of the oil supplementing pump (2) is communicated with an oil tank, an oil outlet of the oil supplementing pump (2) is communicated with an oil supplementing port of the variable pump (3), the variable pump (3) and the rolling brush motor (4) form a closed loop, and the rolling brush motor (4) drives a rolling brush to rotate.
2. A roller brush drive hydraulic system according to claim 1, characterized in that it further comprises a flush valve (6), through which flush valve (6) the roller brush motor (4) communicates with the oil tank.
3. A roller brush driving hydraulic system according to claim 1, characterized in that the system further comprises a radiator (7), and the inlet and outlet of the radiator (7) are both communicated with the oil tank.
4. A roller brush driving hydraulic system according to claim 3, characterized in that an th bypass valve (71) is connected in parallel between the inlet and outlet of the radiator (7).
5. A roller brush drive hydraulic system according to claim 4, characterized in that the bypass valve (71) is a one-way valve.
6. A roller brush drive hydraulic system according to claim 1, characterized in that it further comprises a non-return valve (8), said non-return valve (8) being connected in parallel between the inlet and outlet of the roller brush motor (4).
7. The rolling brush drive hydraulic system according to claim 1, characterized in that a filter (9) is arranged on a communication pipeline between an oil outlet of the oil supply pump (2) and an oil supply port of the variable displacement pump (3).
8. The roller brush drive hydraulic system according to claim 7, characterized in that a second bypass valve (91) is connected in parallel between the inlet and outlet of the filter (9).
9. A roller brush drive hydraulic system according to claim 8, characterized in that the second bypass valve (91) is a relief valve.
10, snow sweeper, characterized by comprising a rolling brush driving hydraulic system according to any of claims 1-9.