CN212376845U

CN212376845U - Displacement adjusting structure of variable plunger motor

Info

Publication number: CN212376845U
Application number: CN202020934180.1U
Authority: CN
Inventors: 赵敏; 杨震方; 郑家旺; 王双; 王英
Original assignee: Tianjin Jieqiang Power Equipment Co ltd
Current assignee: Tianjin Jieqiang Power Equipment Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-01-19
Anticipated expiration: 2030-05-28

Abstract

The utility model relates to the technical field of motor, especially, relate to a displacement control structure of variable plunger motor, it includes casing, end cover, install between casing and end cover and pass pivot, the suit of rotor of casing outside the pivot, pass 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, 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 removes along the piston rod, the fixed cover at the end of 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. The utility model provides a low in construction cost, easy operation need not to change hydraulic system control circuit, just can reach the effect that changes the maximum discharge capacity of motor.

Description

Displacement adjusting structure of variable plunger motor

Technical Field

The utility model relates to the technical field of motors, especially, relate to a displacement adjustment structure of 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 utility model provides an adjusting structure when the maximum flow parameter of the variable plunger motor is not in accordance with the use requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a displacement of variable plunger motor when providing the maximum flow parameter and not being conform to operation requirement adjusts the structure.

The utility model discloses a realize through following technical scheme:

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.

Beneficial effects of the utility model

The utility model discloses a displacement of variable plunger motor adjusts structure of protection, it has following advantage:

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

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.

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 to a variable piston stroke corresponding to the maximum displacement

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.

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.

The utility model discloses just change the maximum discharge capacity of this motor, in the outside of piston rod, a variable piston right side stroke end places an adjustable ring 6 promptly, as shown in fig. 1 to change sloping cam plate maximum inclination to theta 2, thereby realize the change of the maximum discharge capacity of 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;

to sum up, the utility model discloses a displacement of variable plunger motor of protection adjusts structure, and is with low costs, and easy operation need not to change hydraulic system control circuit, just can reach the effect that changes the motor maximum discharge capacity.

Various modifications and changes may occur 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.

Claims

1. 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.

2. A displacement adjusting structure of a variable displacement piston motor in accordance with claim 1, wherein the material of the adjusting ring is 20 steel/45 steel.