阅读说明：本技术 一种变量柱塞马达的排量调节方法及结构 (Displacement adjusting method and structure of variable plunger motor ) 是由 赵敏 杨震方 郑家旺 王双 王英 于 2020-05-28 设计创作，主要内容包括：本发明涉及马达技术领域,尤其涉及一种变量柱塞马达的排量调节方法及结构,其包括如下流程：在变量柱塞马达的变量活塞右行程末端固定安装一个具有一定厚度的调节环；调节环内径d与活塞杆相配合,外径D与变量活塞外径一致,调节环的厚度L由计算确定；根据计算出的L值安装相应厚度的调节环,安装完毕后,再根据试验效果对调节环的厚度L适时调整,直至液压系统工作流量达到所需值。本发明提供的方法及结构成本低,易操作,无需改变液压系统控制回路,就能达到改变马达最大排量的效果。(The invention relates to the technical field of motors, in particular to a displacement adjusting method and a displacement adjusting structure of a variable plunger motor, which comprise the following steps: an adjusting ring with a certain thickness is fixedly arranged at the right stroke end of a variable piston of the variable plunger motor; the inner diameter D of the adjusting ring is matched with the piston rod, the outer diameter D of the adjusting ring is consistent with the outer diameter of the variable piston, and the thickness L of the adjusting ring is determined by calculation; and installing the adjusting ring with the corresponding thickness according to the calculated L value, and then timely adjusting the thickness L of the adjusting ring according to the test effect after the installation is finished until the working flow of the hydraulic system reaches the required value. The method and the structure provided by the invention have low cost and easy operation, and can achieve the effect of changing the maximum displacement of the motor without changing a control loop of a hydraulic system.)

1. A displacement adjusting method of a variable displacement piston motor is characterized by comprising the following procedures:

the adjusting ring with a certain thickness is fixedly arranged at the right stroke end of the variable piston of the variable plunger motor;

the inner diameter D of the adjusting ring is matched with the piston rod, the outer diameter D of the adjusting ring is consistent with the outer diameter of the variable piston, and the thickness L of the adjusting ring is determined by calculation according to the following method:

by the formula

Q_max1Maximum displacement before motor regulation

Q_max2-maximum displacement of motor pre-adjustment

L₁-variable piston stroke corresponding to maximum displacement before motor adjustment

L₂-the motor is preset with a variable piston stroke corresponding to the maximum displacement

To obtain

Installing the adjusting ring with the corresponding thickness according to the calculated L value, and timely adjusting the thickness L of the adjusting ring according to the test effect after the installation is finished until the working flow of the hydraulic system reaches the required value.

2. A displacement adjusting method of a variable displacement piston motor according to claim 1, wherein the material of the adjusting ring is 20 steel/45 steel.

3. The displacement adjusting structure of the variable plunger motor is characterized by comprising a shell, an end cover, a rotating shaft, a rotor, a swash plate and a plurality of plungers, wherein the rotating shaft is installed between the shell and the end cover and penetrates through the shell, the rotor is sleeved outside the rotating shaft, the swash plate penetrates through the rotating shaft, the plungers are installed in the shell and are matched with plunger holes in the rotor, the shell and the end cover are fixedly connected through bolts, the swash plate is respectively provided with a resetting device and a driving device, the driving device comprises a piston rod and a variable piston, the piston rod is fixedly installed on the end cover, the variable piston moves along the piston rod, an adjusting ring is fixedly sleeved at the tail end of the right stroke of the variable piston on the piston rod.

4. A displacement adjusting structure of a variable displacement piston motor in accordance with claim 3, wherein the material of the adjusting ring is 20 steel/45 steel.

Technical Field

The invention relates to the technical field of motors, in particular to a displacement adjusting method and structure of a variable plunger motor.

Background

In the design and calculation process of the hydraulic system, according to the use requirement of the working device, a designer can preliminarily determine working performance parameters of the motor, such as flow, pressure and the like. However, in many cases, the calculation result of the parameters is greatly different from the motor mature product developed and produced at present on the basis of meeting the functional requirements, such as the flow rate. If a product exceeding the calculation parameters is selected, factors such as flow diversion, power loss and the like are considered, and if a new product is re-developed, factors such as research and development cost, production period and the like are involved. The invention provides a method for adjusting the maximum flow parameter of a variable plunger motor when the maximum flow parameter does not meet the use requirement.

Disclosure of Invention

The invention aims to solve the technical problem of providing a displacement adjusting method and a displacement adjusting structure of a variable displacement plunger motor when a maximum flow parameter does not meet the use requirement.

The invention is realized by the following technical scheme:

a displacement adjusting method of a variable displacement piston motor comprises the following procedures:

the adjusting ring with a certain thickness is fixedly arranged at the right stroke end of the variable piston of the variable plunger motor;

the inner diameter D of the adjusting ring is matched with the piston rod, the outer diameter D of the adjusting ring is consistent with the outer diameter of the variable piston, and the thickness L of the adjusting ring is determined by calculation according to the following method:

by the formula

Q_max1Maximum displacement before motor regulation

Q_max2-maximum displacement of motor pre-adjustment

L₁-variable piston stroke corresponding to maximum displacement before motor adjustment

L₂-the motor is preset with a variable piston stroke corresponding to the maximum displacement

To obtain

And installing the adjusting ring with the corresponding thickness according to the calculated L value, and then timely adjusting the thickness L of the adjusting ring according to the test effect after the installation is finished until the working flow of the hydraulic system reaches the required value.

The utility model provides a displacement of variable plunger motor adjusts structure, its includes casing, end cover, installs between casing and end cover and passes the pivot of casing, the rotor of suit outside the pivot, passes the sloping cam plate of pivot and install in the casing and with a plurality of plungers of the plunger hole assorted on the rotor, pass through bolt fixed connection between casing and the end cover, the sloping cam plate is equipped with resetting means and drive arrangement respectively, drive arrangement includes piston rod fixed mounting on the end cover and the variable piston that moves along the piston rod, the fixed cover of the end at variable piston right stroke on the piston rod is equipped with the adjustable ring, and the adjustable ring internal diameter cooperatees with the piston rod, and the external diameter is unanimous with variable piston external diameter.

Further, the material of the adjusting ring is 20 steel/45 steel.

Advantageous effects of the invention

The invention discloses a displacement adjusting method and a structure of a variable plunger motor, which have the following advantages:

1. when the variable motor with proper displacement cannot be selected, the use requirement can be met only by simply changing the local structure of the motor, thereby avoiding the consequences of complicated system, greatly increased manufacturing cost and the like caused by changing a hydraulic system control loop for realizing the requirement;

2. the adjusting ring for displacement change is low in manufacturing cost;

3. the replacement of the adjusting ring is simple and easy to operate.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the adjustment ring configuration;

FIG. 3 is a schematic diagram of a conventional variable displacement piston motor;

in the figure, 1, a plunger, 2, a rotor, 3, a piston rod, 4, a variable piston, 5, a swash plate, 6, an adjusting ring, 7, a rotating shaft, 8, a reset device, 9, a shell and 10, and an end cover.

Detailed Description

A displacement adjusting method of a variable displacement piston motor comprises the following procedures:

the adjusting ring with a certain thickness is fixedly arranged at the right stroke end of the variable piston of the variable plunger motor;

the inner diameter D of the adjusting ring is matched with the piston rod, the outer diameter D of the adjusting ring is consistent with the outer diameter of the variable piston, and the thickness L of the adjusting ring is determined by calculation according to the following method:

by the formula

Q_max1Maximum displacement before motor regulation

Q_max2-maximum displacement of motor pre-adjustment

L₁-variable piston stroke corresponding to maximum displacement before motor adjustment

L₂-the motor is preset with a variable piston stroke corresponding to the maximum displacement

To obtain

And installing the adjusting ring with the corresponding thickness according to the calculated L value, and then timely adjusting the thickness L of the adjusting ring according to the test effect after the installation is finished until the working flow of the hydraulic system reaches the required value.

The utility model provides a displacement of variable plunger motor adjusts structure, its includes casing 9, end cover 10, installs between casing and end cover and passes the pivot 7 of casing, suit in the outer rotor 2 of pivot, pass the sloping cam plate 5 of pivot and install in the casing and with a plurality of plungers 1 of the plunger hole assorted on the rotor, pass through bolt fixed connection between casing and the end cover, the sloping cam plate is equipped with resetting means 8 and drive arrangement respectively, drive arrangement includes piston rod 3 of fixed mounting on the end cover and the variable piston 4 that moves along the piston rod, the fixed cover of end at the right stroke of variable piston on the piston rod is equipped with adjustable ring 6, and the adjustable ring internal diameter cooperatees with the piston rod, and the external diameter is unanimous with variable piston external diameter.

Further, the material of the adjusting ring is 20 steel/45 steel.

The resetting device is the prior art.

It is known that the displacement of the motor is varied by changing the inclination angle θ of the swash plate. Under the action of the control oil path, the variable piston 4 moves along the piston rod 3, the inclination angle theta of the swash plate 5 is changed, and the volume between the plunger 1 and the rotor 2 is changed in real time along with the change of the inclination angle of the swash plate, so that the displacement adjustment is realized. As shown in fig. 2, when the swash plate inclination angle reaches the maximum angle θ 1, the variable piston moves to the rightmost end of the stroke, and the motor displacement reaches the maximum value.

In order to change the maximum displacement of the motor, an adjusting ring 6 is arranged on the outer side of the piston rod, namely the right stroke end of the variable piston, as shown in figure 1, so as to change the maximum inclined angle of the swash plate to theta 2, thereby realizing the change of the maximum displacement of the motor. The method has low cost and easy operation, can meet the use requirement only by simply changing the local structure of the motor, does not need to change a control loop of a hydraulic system, avoids the system from being complicated, greatly improves the manufacturing cost and other consequences;

in conclusion, the displacement adjusting method and the displacement adjusting structure of the variable displacement plunger motor have the advantages of low cost and easiness in operation, and the effect of changing the maximum displacement of the motor can be achieved without changing a control circuit of a hydraulic system.

Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.