Cold recycling machine is a multifunctional construction machinery mainly used for upgrading and renovating old asphalt pavement, that is, cold recycling of the base layer; It can also be used for on-site mixing of stabilized soil at the base and subbase levels in projects such as highways, urban-rural roads, airports, docks, and parking lots. The hydraulic system of the cold regeneration machine consists of five parts: walking hydraulic drive system, working device hydraulic drive system, hydraulic spraying system, hydraulic steering system, and auxiliary hydraulic system,

1行走液壓驅動系統

1. Traveling hydraulic drive system

行走液壓系統主要是為整機的行走提供動力，調整行駛速度，實現整車前進和后退。該系統由SAUER90L75泵、SAUER90M55 前橋馬達和 SAUER51D110-1兩點控制的后橋變量馬達組成一個閉式靜液壓驅動系統，通過90L75泵中斜盤傾角的變化改變泵流量大小，從而實現調速。

The walking hydraulic system mainly provides power for the entire machine's walking, adjusts the driving speed, and realizes the forward and backward movement of the entire vehicle. The system consists of a SAUER90L75 pump, a SAUER90M55 front axle motor, and a SAUER51D110-1 two point controlled rear axle variable motor, forming a closed hydrostatic drive system. By changing the inclination angle of the swashplate in the 90L75 pump, the pump flow rate is changed to achieve speed regulation.

SAUER90L75泵的排量由駕駛室內操作臺右側的軟軸控制器手柄控制，停車時手柄處于中位:向前搬手柄，軟軸鋼絲帶動90L75泵控制手柄轉動，使泵的斜盤傾角發生變化而改變泵的排量，使驅動前橋的定量馬達和驅動后橋的變量馬達改變其輸出轉速，車輛前行;當操縱手柄搬到相反位置時則90L75泵的進出

The displacement of the SAUER90L75 pump is controlled by the soft shaft controller handle on the right side of the operator's console in the driver's cab. When parking, the handle is in the middle position: move the handle forward, and the soft shaft steel wire drives the 90L75 pump control handle to rotate, causing a change in the inclination angle of the pump's swashplate and changing the pump displacement. This causes the quantitative motor driving the front axle and the variable motor driving the rear axle to change their output speed, causing the vehicle to move forward; When the joystick is moved to the opposite position, the inlet and outlet of the 90L75 pump

油口交換，90M55馬達和51D110-1變量馬達反向轉動，車輛倒行。

Oil port exchange, 90M55 motor and 51D110-1 variable motor rotate in reverse, causing the vehicle to reverse.

在該系統的閉式回路中設計了回路沖洗閥，用于將系統的熱油排出起到冷卻作用，同時沖去回路中污物。其管路由馬達上部殼體泄油口接到泵下部的殼體泄油口，然后從泵上部泄油口到集流塊。

A circuit flushing valve has been designed in the closed circuit of the system, which is used to discharge the hot oil from the system for cooling purposes and flush out the dirt in the circuit. The pipe is routed from the upper housing drain port of the motor to the lower housing drain port of the pump, and then from the upper housing drain port of the pump to the manifold block.

2工作裝置液壓驅動系統

2 Working device hydraulic drive system

工作裝置液壓系統為轉子提供回轉運動的動力，并依不同工況適當改變其轉速，它由兩個SAUER90L130泵串接和兩個SAUER90M100馬達組成一個閉式靜液壓驅動系統。兩個90L130泵的高壓油分成兩路，分別驅動銑拌轉子左右兩側的90M100馬達，兩個馬達分別安裝在銑拌轉子兩側的行星式減速機上，減速機輸出動力驅動銑拌轉子。兩個90L130泵A、B口分別用兩根高壓膠管連接起來使兩路油液的能動態互補，在本系統的閉式回路中設計了回路沖洗閥。

The hydraulic system of the working device provides power for the rotary motion of the rotor, and changes its speed appropriately according to different working conditions. It consists of two SAUER90L130 pumps connected in series and two SAUER90M100 motors to form a closed hydrostatic drive system. The high-pressure oil of two 90L130 pumps is divided into two paths, which drive the 90M100 motors on the left and right sides of the milling and mixing rotor. The two motors are installed on the planetary reducers on both sides of the milling and mixing rotor, and the reducer outputs power to drive the milling and mixing rotor. Two 90L130 pumps, Port A and Port B, are connected with two high-pressure hoses to dynamically complement the energy of the two oil circuits. A circuit flushing valve is designed in the closed circuit of this system.

3轉向液壓系統

3 Steering hydraulic system

冷再生機采用前后車架鉸接相對偏轉實現整機轉向，該轉向系統的特點是操縱靈活輕便、工作可靠、結構緊湊布置合理、維修保養方便。該系統由SNP3/38SSC07齒輪泵、單路穩定分流閥、液壓轉向器和轉向油缸等液壓元件組成。

The cold regeneration machine uses front and rear frame hinge relative deflection to achieve overall steering. The characteristics of this steering system are flexible and lightweight operation, reliable operation, compact structure and reasonable layout, and convenient maintenance. The system consists of hydraulic components such as SNP3/38SSC07 gear pump, single stable diverter valve, hydraulic steering gear, and steering cylinder.

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