泵杆

But the working condition of the screw pump is so rigorous that the ordinary rubber could not fulfill the requirement of the terrible working condition such as high temperature,high pressure,long working hours,corrodent,seasonal stress and so on.

但采油螺杆泵工作条件十分苛刻，如高温、高压、工作时间长、磨蚀性介质、周期性挤压力等等，传统的定子橡胶已临近其性能极限。本文主要讨论纳米CaCO3和PVC树脂对丁腈橡胶的改性效果，综合提高丁腈橡胶的强度、耐油、耐磨等性能，通过改性使得丁腈橡胶能够满足采油螺杆泵定子材料的性能要求。

On the basis of introduction of an epicycloid parameter,δ,an equation is derived for cycloid and its screw surface in screw pump.

本文在引入外摆参量δ的基础上建立了螺杆泵摆线和摆线螺面的方程，并通过对δ的研究，提出了螺杆泵的部分设计理论。

Group of Seven holding company subsidiary, is the design, development, manufacturing, sales, service integrates a variety of double-screw pump, the three screw pumps, high pressure hydraulic gear pumps, low pressure and vacuum pump gear-driven products Specialization large manufacturers.

集团下属七大控股公司，是集设计、开发、制造、销售、服务为一体，以各种双螺杆泵、三螺杆泵、高压液压齿轮油泵、低压齿轮输油泵及真空泵为主导产品的专业化大型生产厂家。

Some basic theories and studies of rod pump test equipment such as displacement sample curves are introduced.

分析了几种现有有杆泵动态测试装置的总体方案，以及有杆泵动态测试装置伺服机系统目前已有研究基础及成果，给出了伺服机系统的样本曲线。

On the basis of the method of separating variables of sucker rod wave equation,in combination the matrix recursion technology with trigonometric series recursion technology,a kind of quick arithmetic of pump dynamograph in failure diagnosis technology of sucker rod pumping system is proposed.

在抽油杆柱波动方程分离变量法的基础上，将矩阵递推技术与三角级数递推技术相结合，提出了有杆抽油系统故障诊断技术中计算泵功图的一种快速算法，这种方法不仅适用于单级抽油杆采油系统，同时也适用于不同材质、不同杆径抽油杆组成的抽油系统。

This paper introduces an approach that the CoCreate OneSpace Modeling software is used to precisely construct the model of the 135 three screw pump .

介绍了一种在CoCreate OneSpace Modeling设计环境下精确创建135型三螺杆泵实体模型的方法，在建模过程中通过运用动态模型技术，从而缩短了三螺杆泵的研发周期，提高了产品的精确度。

It is primarily fixed in the bushing in the pump and placed in the pump cylinder screw, and with the active engagement of the two driven screw formed.

它主要是由固定在泵体中的衬套以及安插在泵缸中的主动螺杆和与其啮合的两根从动螺杆所组成。

It is mainly fixed on the pump body from the bush, as well as placement in the pump cylinder screw, and the initiative with its meshing of screw driven by two components.

它主要是由固定在泵体中的衬套以及安插在泵缸中的主动螺杆和与其啮合的两根从动螺杆所组成。

The main products: geological accessories; drill, drill gear; mud pump, mud pump accessories; and drill pipe, joint locks, consisting mainly of drilling materials, to pull the drill pipe, casing pliers, Bocha, consisting mainly of drilling pad fork Tools; series of geological accessories ......

主要产品：地质配件；钻机，钻机齿轮；泥浆泵，泥浆泵配件；和以钻杆，锁接头，为主的钻探材料；以钻杆钳子，套管钳子，拨叉，垫叉为主的钻探工具；等系列地质配件。。。。。。

Cited Pistons pull vent valve 10-valve piston cited the role of pulling out are seized cylinder piston rod, when its mild in China emerged after the main hydraulic cylinder rod cavity and there is no cavity under the pressure dropped, so that the main hydraulic cylinder in motion the process of increasing resistance to the main pump to increase the load, resulting in engine speed when pumping declining situation.

3活塞引拔阀内泄活塞引拔阀10的作用是拉出检缸活塞杆，当其出现轻度内泄后，主液压缸无杆腔和有杆腔的压差下降，使主液压缸动作过程中阻力增加，使主泵负荷加大，导致泵送时出现发动机转速下降的现象。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。