CN218624603U

CN218624603U - Displacement feedback device of plunger pump

Info

Publication number: CN218624603U
Application number: CN202223193152.7U
Authority: CN
Inventors: 粟武洪; 王伟健
Original assignee: Shaoyang Victor Hydraulics Co ltd
Current assignee: Shaoyang Victor Hydraulics Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-03-14
Anticipated expiration: 2032-11-30

Abstract

The utility model discloses a plunger pump discharge capacity feedback device, it is including fixing the observation window on the pump case, is equipped with fixing base and pointer axle between observation window and the sloping cam plate, and the pointer axle passes fixing base and sloping cam plate fixed connection, fixing base and pump case fixed connection, and the pointer axle rotates with the fixing base to be connected, and the upper end of pointer axle is fixed with the pointer, and the pointer is located between fixing base and the observation window, is equipped with the sealing member between observation window and the pump case, is equipped with on the observation window with pointer matched with scale. Compared with the prior art, the utility model only needs one sealing element to seal the feedback device, does not need dynamic sealing, and has good reliability and long service life; and secondly, the dynamic seal is cancelled, so that the pointer shaft and the fixed seat can be simplified, and the processing difficulty of parts and the requirements on the material of the parts are reduced. Thirdly, the disc, the pointer shaft and the fixed seat are sealed in the pump shell through the observation window, so that foreign matters are prevented from entering, and the pollution resistance is improved.

Description

Displacement feedback device of plunger pump

Technical Field

The utility model belongs to the technical field of plunger pump discharge capacity monitoring technology and specifically relates to a plunger pump discharge capacity feedback device is related to.

Background

The plunger pump is an important energy conversion element in a high-pressure hydraulic system, and changes the volume of hydraulic oil in a closed cavity by means of the reciprocating motion of a plunger in a plunger piston shoe assembly in a cylinder body, so that the suction and extrusion of the hydraulic oil in a hydraulic loop are realized, and mechanical energy provided by a motor is converted into hydraulic energy. Especially, the variable plunger pump can carry out variable according to the requirement of the actual working condition, thereby providing the oil quantity actually required by the system and achieving the purpose of energy conservation.

The variable plunger pump is a variable process, namely a process of changing the deflection angle of the cradle. Whether the variable pump is variable (or whether the variable pump is reset after being variable) can be judged through the oil quantity of the oil outlet of the pump. However, this method requires a flow meter at the outlet of the pump. Another approach is to implement a displacement display feedback device. The displacement display feedback device can judge the angle of the swash plate of the pump, so that the flow change value of the oil outlet is obtained, and more importantly, a basis can be provided for troubleshooting common faults in a hydraulic system. This displacement feedback display is therefore important for variable displacement piston pumps. The patent with publication number CN217652896U discloses a real-time monitoring device for swash plate swing angle of a mechanical aviation hydraulic pump, which comprises a shaft neck cover plate fixed with a shell of the aviation hydraulic pump, wherein a shaft body is arranged on the shaft neck cover plate, the shaft body extends towards the swash plate of the aviation hydraulic pump and is coaxial with a rotation axis of the swash plate, the shaft body is rotatably connected with the swash plate, a plug fixed with the swash plate is arranged at the inner side end of the shaft body, a pointer pin sequentially penetrating through the shaft body and the shaft neck cover plate is arranged on the plug, a pointer body is arranged at the end part of the pointer pin, and a dial fixed with the shaft neck cover plate is arranged on one side of the pointer body. However, the real-time monitoring device for the swing angle of the swash plate has the following problems:

1. the device adopts 1 path of dynamic seal and 1 path of static seal for sealing treatment. The dynamic seal is easy to be damaged, and the risk of oil leakage is high.

2. The first sealing ring arranged between the pointer pin and the shaft body ensures that the pointer pin is not oil-tight and can rotate freely, so that the requirements on surface roughness, position degree and the like of a part matching part can be high by arranging the dynamic seal, and the processing difficulty is high.

3. The pointer pin and the shaft body are in clearance fit, so that foreign matters and liquid can easily enter the position to cause damage to the first sealing ring, and oil leakage of the pump is caused.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Based on this, the utility model provides a plunger pump discharge capacity feedback device to solve the poor and big problem of the processing degree of difficulty of discharge capacity adjusting device's leakproofness among the prior art.

(II) technical scheme

The utility model discloses an overcome above-mentioned problem or solve above-mentioned problem at least partially, provide a plunger pump discharge capacity feedback device, including fixing the observation window on the pump case, be equipped with fixing base and pointer axle between observation window and the sloping cam plate, the pointer axle passes fixing base and sloping cam plate fixed connection, fixing base and pump case fixed connection, the pointer axle rotates with the fixing base to be connected, the upper end of pointer axle is fixed with the pointer, the pointer is located between fixing base and the observation window, be equipped with the sealing member between observation window and the pump case, be equipped with on the observation window with pointer matched with scale.

Preferably, the lower end of the pointer shaft is connected with the swash plate through a pin, and the axis of the pin is not coincident with the axis of the swash plate.

Preferably, the upper end of the pointer shaft is provided with a disc, the pointer is fixed on the disc, and the disc is arranged between the fixed seat and the observation window.

Preferably, the pointer shaft is divided into an upper section and a lower section, the upper section is fixedly connected with the pointer shaft, the lower section is connected with the swash plate through a pin, and a clamping plate is fixed at the lower end of the pointer shaft and arranged between the swash plate and the fixed seat.

Preferably, a positioning pin is arranged between the upper pointer shaft and the lower pointer shaft, and the upper pointer shaft and the lower pointer shaft are fixed through bolts.

Preferably, the fixed seat is in threaded connection with the pump shell.

Preferably, the observation window is fixed with the pump shell through a screw.

Preferably, the sealing element is a sealing ring.

Preferably, the observation window is of a circular structure.

Preferably, the number of the screws is four, and the four screws are distributed along the circumferential direction of the observation window.

(III) advantageous effects

The utility model discloses a plunger pump discharge capacity feedback device has following advantage:

the utility model only needs one sealing element to seal the feedback device, does not need dynamic sealing, and has good reliability and long service life; and secondly, the dynamic seal is cancelled, so that the pointer shaft and the fixed seat can be simplified, and the processing difficulty of parts and the requirements on the material of the parts are reduced. Thirdly, the disc, the pointer shaft and the fixed seat are sealed in the pump shell through the observation window, so that foreign matters are prevented from entering, and the pollution resistance is improved.

Drawings

The features and advantages of the invention will be more clearly understood by reference to the accompanying drawings, which are schematic and should not be understood as imposing any limitation on the invention, in which:

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

FIG. 2 is a top view of a portion of the structure of the present invention;

fig. 3 is a schematic structural view of the observation window of the present invention.

Description of the reference numerals:

1. the novel electronic scale comprises a pump shell, 2 an observation window, 3 a fixed seat, 4 a pointer shaft, 5 a pointer, 6 a sealing piece, 7 scales, 8 pins, 9 discs, 10 clamping plates, 11 positioning pins, 12 bolts, 13 screws and 14 swash plates.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

Referring to fig. 1 and 3, the present embodiment provides a displacement feedback device for a plunger pump, including an observation window 2 fixed on the outer surface of a pump case 1, a fixing seat 3 and a pointer shaft 4 are arranged between the observation window 2 and a swash plate 14, the pointer shaft 4 penetrates the fixing seat 3 and the swash plate 14 to be fixedly connected, the fixing seat 3 and the pump case 1 are fixedly connected, and specifically, the fixing seat 3 and the pump case 1 are in threaded connection. Pointer shaft 4 rotates with fixing base 3 to be connected, and the upper end of pointer shaft 4 is fixed with pointer 5, and pointer 5 locates between fixing base 3 and observation window 2, is equipped with sealing member 6 between observation window 2 and the pump case 1, is equipped with on the observation window 2 with pointer 5 matched with scale 7. The swash plate 14 rotates to rotate the pointer shaft 4, and the pointer shaft 4 rotates to rotate the pointer 5. Then, the change of the angle of the swash plate 14 can be fed back by pointing the pointer 5 to different scales 7 on the observation window 2, so that the change of the angle of the cradle of the plunger pump can be known.

Specifically, the lower extreme of pointer shaft 4 is connected with sloping cam plate 14 through pin 8, and the both ends of pin 8 are inserted respectively in sloping cam plate 14 and pointer shaft 4, and the axis of pin 8 does not coincide with the axis of sloping cam plate 14, and sloping cam plate 14 is rotatory can drive pointer shaft 4 above it to rotate through pin 8, and pin 8 between sloping cam plate 14 and the pointer shaft 4 is a plurality ofly in this embodiment.

As another implementation of the present invention: the upper end of pointer shaft 4 is equipped with disc 9, and pointer 5 is fixed on disc 9, and disc 9 locates between fixing base 3 and observation window 2.

As another implementation of the present invention: pointer axle 4 divide into upper segment and hypomere, and upper segment pointer axle 4 and hypomere pointer axle 4 fixed connection, it is specific, be equipped with locating pin 11 between upper segment pointer axle 4 and the hypomere pointer axle 4, and upper segment pointer axle 4 passes through bolt 12 with hypomere pointer axle 4 to be fixed, sets up locating pin 11 and ensures that the initial position of pointer 5 on the disc 9 is correct. Lower section pointer axle 4 passes through pin 8 and is connected with sloping cam plate 14, and the lower extreme of pointer axle 4 is fixed with cardboard 10, and cardboard 10 is located between sloping cam plate 14 and the fixing base 3, and cardboard 10 cooperatees with fixing base 3, can effectively prevent pointer axle 4 to shift up.

Specifically, the disc 9 is provided with a groove for receiving the head of the bolt 12, so that the head of the bolt 12 is hidden in the disc 9.

Referring to fig. 2, the observation window 2 is fixed to the pump casing 1 by screws 13, specifically, four screws 13 are provided, and the four screws 13 are distributed along the circumferential direction of the observation window 2.

Specifically, the sealing element 6 is a sealing ring, the observation window 2 is of a circular structure, and the observation window 2 and the disc 9 are coaxially arranged.

Specifically, the observation window 2 is made of glass.

The utility model discloses in, earlier fix hypomere pointer shaft 4 in the top of sloping cam plate 14 through pin 8, then twist fixing base 3 in pump case 1, at this moment, cardboard 10 is pushed down along the lower of fixing base 3, then be connected upper segment pointer shaft 4 with hypomere pointer shaft 4 with locating pin 11, rethread bolt 12 is fixed with two sections pointer shafts 4, in this step, ensure through pin 8 that hypomere pointer shaft 4 is correct with sloping cam plate 14's position, ensure through locating pin 11 that upper segment pointer shaft 4 is correct with hypomere pointer shaft 4 position, thereby ensure that pointer 5 on the disc 9 is correct with the corresponding relation of scale 7 on the observation window 2. Finally, the observation window 2 is fixed on the outer surface of the pump shell 1 through a screw 13, and the observation window 2 and the pump shell 1 are sealed through a sealing ring.

During operation, the inclined plate 14 rotates, under the action of the pin 8, the pointer shaft 4 is driven to rotate, and the pointer shaft 4 drives the pointer 5 to rotate. Then, the change of the angle of the swash plate 14 can be fed back by pointing the pointer 5 to different scales 7 on the observation window 2, so that the change of the angle of the cradle of the plunger pump can be known.

The utility model only needs one sealing element 6 to seal the feedback device, does not need dynamic sealing, and has good reliability and long service life; secondly, the dynamic seal is cancelled, so that the pointer shaft 4 and the fixed seat 3 can be simplified, and the processing difficulty of parts and the requirements on the material of the parts are reduced. Thirdly, the disc 9, the pointer 5, the pointer shaft 4 and the fixed seat 3 are sealed in the pump shell 1 through the observation window 2, thereby avoiding the entry of foreign matters and improving the anti-pollution capability.

Finally, the method of the present invention is only a preferred embodiment and is not intended to limit the scope of the present invention. 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.

Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. The utility model provides a plunger pump discharge capacity feedback device, its characterized in that, is including fixing the observation window on the pump case, be equipped with fixing base and pointer axle between observation window and the sloping cam plate, the pointer axle passes fixing base and sloping cam plate fixed connection, fixing base and pump case fixed connection, the pointer axle rotates with the fixing base to be connected, the upper end of pointer axle is fixed with the pointer, the pointer is located between fixing base and the observation window, be equipped with the sealing member between observation window and the pump case, be equipped with on the observation window with pointer matched with scale.

2. A displacement feedback device of a plunger pump according to claim 1, wherein the lower end of the pointer shaft is connected to the swash plate by a pin, and the axis of the pin is not coincident with the axis of the swash plate.

3. A displacement feedback device for a plunger pump according to claim 2, wherein a disc is provided at an upper end of the pointer shaft, the pointer is fixed to the disc, and the disc is provided between the fixed base and the observation window.

4. The displacement feedback device of the plunger pump as claimed in claim 3, wherein the pointer shaft is divided into an upper section and a lower section, the upper section is fixedly connected with the pointer shaft, the lower section is connected with the swash plate through a pin, a clamping plate is fixed at the lower end of the pointer shaft, and the clamping plate is arranged between the swash plate and the fixed base.

5. The displacement feedback device of the plunger pump as claimed in claim 4, wherein a positioning pin is arranged between the upper pointer shaft and the lower pointer shaft, and the upper pointer shaft and the lower pointer shaft are fixed through bolts.

6. A displacement feedback device for a plunger pump according to claim 1, wherein the fixed seat is threadedly connected to the pump housing.

7. A displacement feedback device for a plunger pump according to claim 1, wherein the viewing window is fixed to the pump housing by a screw.

8. A displacement feedback device for a plunger pump according to claim 1, wherein the sealing member is a sealing ring.

9. A displacement feedback device for a plunger pump according to claim 7, wherein the viewing window is of circular configuration.

10. A displacement feedback device for a plunger pump according to claim 9, wherein the number of screws is four, and four of the screws are distributed along the circumference of the observation window.