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高压柱塞泵特点
高压柱塞泵特点
Characteristics of High Pressure Piston Pump
1.瞬时流量是脉动的
1. Instantaneous flow is pulsating.
这是因为在柱塞泵中，液体介质的吸入和排出过程是交替进行的，而且活塞在位移过程中，其速度又在不断地变化之中。在只有一个工作腔的泵中，泵的瞬时流量不仅随时间而变化，而且是不连续的。随着工作腔的增多，瞬时流量的脉动幅度越来越小，乃至在实用上可以认为是紊流。
This is because in the plunger pump, the process of inhalation and discharge of liquid medium is alternately carried out, and the piston's speed is constantly changing in the process of displacement. In a pump with only one working chamber, the instantaneous flow rate of the pump varies not only with time, but also discontinuously. With the increase of working chamber, the fluctuation amplitude of instantaneous flow becomes smaller and smaller, and even can be considered as turbulence in practice.
2.平均流量是恒定的
2. Average flow is constant
理论上，泵的流量只取决于泵的主要结构参数 n（每分钟往复次数）、S（活塞行程）、D（活塞直径）、Z（活塞数目），与排出压力无关，且与输送介质的温度、粘度等物理、化学性质无关。所以说泵的流量是恒定的。
In theory, the flow rate of the pump only depends on the main structural parameters N (number of reciprocating times per minute), S (piston stroke), D (piston diameter), Z (number of pistons). It has nothing to do with the discharge pressure, and has nothing to do with the physical and chemical properties such as temperature and viscosity of the conveying medium. So the flow rate of the pump is constant.
3.泵的压力取决于管道特性
3. Pump pressure depends on pipeline characteristics
柱塞泵的排出压力不能由泵本身限定，而是取决于泵装置的管道特性，并且与流量无关。也就是说，如果认为输送液体是不可压缩的，那么，在理论上可认为往复泵的排出压力将不受任何限制，即可根据泵装置的管道特性，建立泵的任何所需的排出压力。当然，所有往复泵都有一个泵的排出压力的规定，这不是说该泵的排出压力不会再升高，而只是说，由于原动机额定功率和泵本身的结构强度的限制，不允许在超出这一排出压力下使用而己。
The discharge pressure of the plunger pump can not be limited by the pump itself, but depends on the pipeline characteristics of the pump device, and has nothing to do with the flow rate. That is to say, if it is considered that the conveying liquid is incompressible, then, in theory, it can be considered that the discharge pressure of reciprocating pump will not be restricted, that is, according to the characteristics of the pipeline of the pump device, any required discharge pressure of the pump can be established. Of course, all reciprocating pumps have a pump discharge pressure regulation, this does not mean that the pump discharge pressure will not rise again, but simply because of the rated power of the prime mover and the structural strength of the pump itself, it is not allowed to use beyond this discharge pressure.
Characteristics of High Pressure Piston Pump
1.瞬时流量是脉动的
1. Instantaneous flow is pulsating.
这是因为在柱塞泵中，液体介质的吸入和排出过程是交替进行的，而且活塞在位移过程中，其速度又在不断地变化之中。在只有一个工作腔的泵中，泵的瞬时流量不仅随时间而变化，而且是不连续的。随着工作腔的增多，瞬时流量的脉动幅度越来越小，乃至在实用上可以认为是紊流。
This is because in the plunger pump, the process of inhalation and discharge of liquid medium is alternately carried out, and the piston's speed is constantly changing in the process of displacement. In a pump with only one working chamber, the instantaneous flow rate of the pump varies not only with time, but also discontinuously. With the increase of working chamber, the fluctuation amplitude of instantaneous flow becomes smaller and smaller, and even can be considered as turbulence in practice.
2.平均流量是恒定的
2. Average flow is constant
理论上，泵的流量只取决于泵的主要结构参数 n（每分钟往复次数）、S（活塞行程）、D（活塞直径）、Z（活塞数目），与排出压力无关，且与输送介质的温度、粘度等物理、化学性质无关。所以说泵的流量是恒定的。
In theory, the flow rate of the pump only depends on the main structural parameters N (number of reciprocating times per minute), S (piston stroke), D (piston diameter), Z (number of pistons). It has nothing to do with the discharge pressure, and has nothing to do with the physical and chemical properties such as temperature and viscosity of the conveying medium. So the flow rate of the pump is constant.
3.泵的压力取决于管道特性
3. Pump pressure depends on pipeline characteristics
柱塞泵的排出压力不能由泵本身限定，而是取决于泵装置的管道特性，并且与流量无关。也就是说，如果认为输送液体是不可压缩的，那么，在理论上可认为往复泵的排出压力将不受任何限制，即可根据泵装置的管道特性，建立泵的任何所需的排出压力。当然，所有往复泵都有一个泵的排出压力的规定，这不是说该泵的排出压力不会再升高，而只是说，由于原动机额定功率和泵本身的结构强度的限制，不允许在超出这一排出压力下使用而己。
The discharge pressure of the plunger pump can not be limited by the pump itself, but depends on the pipeline characteristics of the pump device, and has nothing to do with the flow rate. That is to say, if it is considered that the conveying liquid is incompressible, then, in theory, it can be considered that the discharge pressure of reciprocating pump will not be restricted, that is, according to the characteristics of the pipeline of the pump device, any required discharge pressure of the pump can be established. Of course, all reciprocating pumps have a pump discharge pressure regulation, this does not mean that the pump discharge pressure will not rise again, but simply because of the rated power of the prime mover and the structural strength of the pump itself, it is not allowed to use beyond this discharge pressure.
