全部
  • 全部
  • 产品管理
  • 新闻资讯
  • 介绍内容
  • 企业网点
  • 常见问题
  • 企业视频
  • 企业图册
+
  • YOT.jpg

Non speed up series hydraulic coupling

key word:Heat exchange element


Product description

Non speed up series hydraulic coupling

 

1. Introduction

1.1. Application

There are two kinds of non increasing speed series hydraulic couplings, YT series hydraulic couplings and YOTC series hydraulic couplings, which are generally matched with electric speed regulating feed water pump sets under corresponding working conditions.

1.2. Model meaning

YT-**

YT series hydraulic coupling code

**-------Pump turbine effective diameter nominal size (cm)

 

YOTC-**

YOTC -- Code of YOTC series hydraulic coupling

**------------Pump turbine effective diameter nominal size (cm)

1.3. Structural features

YT series hydraulic coupling (see Fig. 11-1).

YT series hydraulic coupling is mainly composed of input shaft, pump wheel, rotating shell, turbine, scoop tube and output shaft. The support bearings are half split sliding bearing with black gold bushing and bidirectional thrust bearing with self positioning pad. It has complete working oil, lubricating oil system and auxiliary oil pump. The working oil and lubricating oil pipelines are combined in one box, and the lower part of the box is the oil tank with compact structure. The power transmission between hydraulic coupling and motor and between hydraulic coupling and feed pump is completed by flexible coupling. The power transmission between the pump shaft of the hydraulic coupling and the turbine shaft of the hydraulic coupling is transmitted by the working oil. In the speed control system of the hydraulic coupling (see Fig. 11-2), the actuator drives the scoop tube to move in the working chamber according to the control signal, so as to change the oil filling amount in the hydraulic coupling and realize the stepless adjustment of the output speed.

1.3.1.1. Oil circulation (see Figure 11-3). The same oil is used for working oil and lubricating oil. The charging pumps supplying working oil and lubricating oil are centrifugal pump and gear pump, which are driven by the input shaft of hydraulic coupling. When the pump set is started, stopped and damaged, the lubricating oil of the pump set is supplied by the electric auxiliary lubricating oil pump.

The working oil circulation is composed of a closed cycle and an open cycle, which can change the filling volume.

In the closed circulation circuit, the pressure oil supplies oil to the working oil chamber of the coupling through the working oil inlet orifice plate. The working oil in the working chamber is sucked out by the scoop tube. Under the action of back pressure, the working oil flows through the working oil cooler to dissipate heat and returns to the working chamber of the coupling. The surplus working oil supplied by the working oil pump returns to the oil tank through the working oil overflow valve. When the liquid filling amount of the coupling is reduced, the surplus working oil also returns to the oil tank. The setting of working oil operating pressure is related to the relief valve of working oil.

The lubricating oil circulation is formed when the oil from the main lubricating oil pump reaches the bearing points, pressure switches and gear lubrication places through the lubricating oil cooler and double cylinder filter screen. The lubricating oil pressure is set by the relief valve. In order to ensure that each bearing has lubricating oil lubrication during the start-up, shutdown and fault of the coupling, an electric auxiliary lubricating oil pump supplies oil to the bearings before and after the main motor starts and stops.

The electric auxiliary oil pump is driven by a motor to pump oil from the oil tank and supply oil to the oil circulation circuit through the check valve.

1.3.1.2. External oil supply. Lubrication of external equipment (i.e. motor, driven machine or coupling) is provided by the lubricating oil circuit of the coupling, and its return oil returns to the oil tank.

Flow orifices are installed on the lubricating oil outlet pipes at the motor side and feed pump side of the coupling. These orifices can be adjusted according to the required oil flow and pressure before commissioning.

1.3.2. YOTC series hydraulic coupling (see Fig. 11-4).

YOTC hydraulic coupling has complete working oil and lubricating oil system. The same oil is used for working oil and lubricating oil, and one oil tank at the lower part of hydraulic coupling is shared. The working oil system and the lubricating oil pump share the same oil pump, which is driven by the input shaft through the transmission gear. After passing through the oil cooler, the oil output from the oil pump is divided into two channels, one of which enters into the hydraulic coupling through the oil supply chamber to do work, and the oil discharged from the spoon tube directly returns to the oil tank; the other way of oil is filtered by the oil filter and supplied to each bearing for lubrication, and the return oil also enters the oil tank directly (see Fig. 11-5)

The lubricating oil system not only supplies the lubricating oil of the machine, but also the bearing lubricating oil of water pump, motor and front pump. The axial force of the hydraulic coupling is borne by double row radial spherical rolling bearing. Its inner ring is installed on the turbine shaft, and the outer ring is connected with the pump shaft through the rotating bearing seat. Double row radial spherical rolling bearing has the ability of self-aligning, which can reduce the influence caused by box deformation and center hole deviation. The rotor is a single row centripetal roller bearing supporting the bearing, which is easy to install and disassemble, and can ensure a certain amount of axial movement of the pump turbine rotor.

The speed regulating mechanism is of horizontal scoop tube inclined insertion type (see Fig. 11-6). According to the control signal, the actuator directly drives the horizontal inclined inserted scoop tube through the crank and connecting rod to move in horizontal direction and change the oil filling amount in the hydraulic coupling to realize the stepless adjustment of the output speed.

 

2. Main technical parameters and product appearance

2.1. Main technical parameters

2.1.1.Typical technical parameters.

2.1.1.1. Typical technical parameters of YT series hydraulic coupling. Typical technical parameters of YT62 hydraulic coupling are shown in table 11-1.

Table 11-1 typical technical parameters of YT62 hydraulic coupling

Item Parameters
Transmission powerkW 3200
Rated slip% 3
Speedr/min) 2985
Variable speed range (%) 25100

2.1.1.2. Typical technical parameters of YOTC series hydraulic coupling (see table 11-2)

Table 11-2 typical technical parameters of YOTC series hydraulic coupling

Parameters

Model
Input speed Transmission power range Variable speed range
r/min) kW) %
YOTC800 750 170260 25100
1000 450650 25100
YOTC1000 600 280400 25100
750 400800 25100
1000 10001800 25100
YOTC1150 600 450800 25~100
750 9501600 25100

2.1.2. Parameter curve (see figure 11-7 and figure 11-8).

2.2. Product appearance (see Figure 11-9)

 

3. Selection method

When ordering the variable speed hydraulic coupling, the user should provide the following basic parameters:

3.1. Maximum output speed of prime mover (r/min)

3.2. Maximum output power of prime mover (kW)

3.3. The maximum input speed of the driven machine (r/min).

3.4. Maximum input power of driven machinery (kW)

3.5. Amount of lubricating oil required for external machinery.

3.6. Direction of rotation.

 

4. Scope of supply

Hydraulic coupling body, oil cooler, oil filter, gear oil pump, overflow valve, electric actuator, thermal resistance, speed measuring probe, elastic cylindrical pin coupling, etc.