Company Profile公司简介
GEMI, headquartered inSouth Croydon, London, UK, is an international company specializing in the design, production and manufacturing of hydraulic couplers.
GEMI independently developed GE-FC series torque limiting hydraulic coupler, which is mainly used in electric equipment, mining equipment, metallurgical equipment, port and dock equipment and other industries. Since its establishment, the company has always adhered to the concept of "the best price, the best quality" to provide customers with the best products and technical support and sound after-sales service. Continuously strive to improve product quality and production technology, and enjoy a high reputation in the industry with advanced technology, unique design and reliable product quality.
捷米（GEMI）总部位于英国伦敦南克罗伊登，是一家专业设计和生产制造液力偶合器的国际化公司。
GEMI自主研发的G E - FC系列限矩型液力偶合器，主要应用于电力设备、矿山设备、冶金设备、港口码头设备等行业。自公司成立以来，始终坚持“价格最优、质量最好”的理念，为客户提供最好的产品和技术支持及健全的售后服务。持续不断地努力提升产品质量和生产技术水平，凭借先进的技术和独特的设计以及可靠的产品质量，在业内享有盛誉。
Purpose 液力偶合器用途
Hydraulic couplers are classified as either torque limiting hydraulic couplers or speed regulating hydraulic couplers, depending on their intended purpose. The torque limiting hydraulic coupler is mainly used to provide starting protection for the motor reducer, impact protection during operation, position compensation, and as an energy buffer. The variable speed hydraulic coupler is mainly used to adjust the input/output speed ratio, in addition to all the uses mentioned above for the torque limiting hydraulic coupler.
根据用途的不同，液力偶合器分为限矩型液力偶合器和调速型液力偶合器。其中限矩型液力偶合器主要用于对电机减速机的启动保护及运行中的冲击保护，位置补偿及能量缓冲；调速型液力偶合器主要用于调整输入输出转速比，其它的功能和限矩型液力偶合器基本一样。
Working principle工作原理
Hydraulic couplers are non-rigid couplers with liquid as the working medium. The GEMI hydraulic coupling (K series) is a fixed liquid-filled type of coupler that consists of three main parts: the pump wheel, the turbine, and the housing pump wheel and turbine (see figure) form a closed working chamber that can circulate liquid. The pump wheel is installed on the input shaft and the turbine is installed on the output shaft. The two wheels are semi-circular rings with multiple blades arranged along the radial axis. The blades do not contact each other. There is a gap of 3 mm to 4 mm between the blades which form a circular working wheel. The driving wheel is called the pump wheel, the driven wheel is called the turbine, and both the pump wheel and turbine are called working wheels. After the pump wheel and turbine are assembled, an annular cavity is formed, which is filled with working oil.
The GEMI hydraulic coupling (K series) is a fixed liquid-filled type of coupling and consists of three main parts as shown in the figure.
GEMI液力偶合器 (K系列)为固定充液型,由三个主要部件组成（如图）。
1 - The driving impeller (pump wheel) is installed on the input shaft.主动叶轮 (泵轮)，安装于输入轴。
2 - The driven impeller (turbine) is installed on the output shaft.从动叶轮 (涡轮)，安装于输出轴。
3 - The housing is connected to the outer impeller flange and has a compression oil seal.外壳，与外部叶轮法兰联接，带有压紧油封。
The first two components can be used as pump wheels or turbines.前两个部件都可以用作泵轮或涡轮。
液力偶合器是以液体为工作介质的一种非刚性联轴器。液力偶合器的泵轮和涡轮组成一个可使液体循环流动的密闭工作腔(见上图)，泵轮装在输入轴上,涡轮装在输出轴上。两轮为沿径向排列着许多叶片的半圆环，它们相向偶合布置，互不接触，中间有3mm到4mm的间隙，并形成一个圆环状的工作轮。驱动轮称为泵轮，被驱动轮称为涡轮，泵轮和涡轮都称为工作轮。泵轮和涡轮装合后，形成环形空腔，其内充有工作油液。
The pump wheel usually rotates under the drive of internal combustion engine or motor, and the blade drives the oil. Under the centrifugal force, the oil is thrown to the edge of the pump wheel blade. Since the radius of the pump wheel and turbine is equal, when the speed of the pump wheel is greater than the turbine speed, the hydraulic pressure at the outer edge of the pump wheel blade is greater than the hydraulic pressure at the outer edge of the turbine blade. Because the differential pressure fluid impacts the turbine blade, when the external resistance is enough to overcome, the turbine starts to rotate, That is, the kinetic energy is transferred to the turbine to make the turbine and pump wheel rotate in the same direction. After the kinetic energy of the oil drops, it flows back to the pump wheel from the blade edge of the turbine, forming a circulation loop, and its flow path is like a ring helix connected end to end. The hydraulic coupler transmits torque by the change of momentum moment generated by the interaction of liquid, pump wheel and turbine blade. When ignoring the wind loss and other mechanical losses when the impeller rotates, its output (turbine) torque is equalto the input (pump wheel) torque.
泵轮通常在内燃机或电机驱动下旋转，叶片带动油液，在离心力作用下，这些油液被甩向泵轮叶片边缘，由于泵轮和涡轮的半径相等，故当泵轮的转速大于涡轮转速时，泵轮叶片外缘的液压大于涡轮叶片外缘的液压，由于压差液体冲击涡轮叶片，当足以克服外阻力时，使涡轮开始转动，即是将动能传给涡轮，使涡轮与泵轮同方向旋转。油液动能下降后从涡轮的叶片边缘又流回到泵轮，形成循环回路，其流动路线如同一个首尾相连的环形螺旋线。液力偶合器靠液体与泵轮、涡轮的叶片相互作用产生动量矩的变化来传递扭矩。在忽略不计叶轮旋转时的风损及其他机械损失时，它的输出(涡轮)扭矩等于输入(泵轮)扭矩。
