CN114294220B - Low-loss gear pump and machining method thereof - Google Patents

Abstract

The invention discloses a low-loss gear pump and a processing method thereof, and the method specifically comprises the following steps: the oil outlet is formed in one side of the shell, and the oil inlet is formed in one side, far away from the oil outlet, of the shell; the base is arranged at the bottom of the shell, and the top of the base is fixedly connected with the bottom of the shell; the cavity is arranged inside the shell, and two sides of the cavity are respectively communicated with the oil outlet and the oil inlet; the cavity includes: the top and the bottom of the inner wall of the cavity body shell are fixedly connected with an expansion cavity, and the bottom of the expansion cavity is provided with an expansion port; the invention relates to the technical field of gear pumps, in particular to an expansion bar which is arranged in an expansion port and is in sliding connection with the expansion port. The low-loss gear pump and the processing method thereof can supplement the clearance generated by the deviation of the other side of the gear, are safer and more reliable to use, conveniently ensure the working efficiency of the gear pump and prolong the service life of the gear pump.

Description

A low-loss gear pump and its processing method

technical field

The invention relates to the technical field of gear pumps, in particular to a low-loss gear pump and a processing method thereof.

Background technique

The gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gear to transport liquid or pressurize it. It consists of two gears, the pump body and the front and rear covers to form two closed spaces. , the volume of the space on the disengagement side of the gear increases from small to large, forming a vacuum, sucking the liquid, the volume of the space on the meshing side of the gear from large to small, and squeezing the liquid into the pipeline, the suction cavity and the discharge cavity are connected by two Separated by the meshing line of the gears, the pressure at the discharge port of the gear pump depends entirely on the resistance at the pump outlet. The pressure in the oil pressure area of the currently used gear pump is greater than the pressure in the oil suction area, resulting in an unbalanced radial force of the hydraulic pump, causing the drive shaft to deviate from the oil suction area, causing the gear to scrape against the inner wall of the pump, affecting the normal operation of the pump and causing leakage. , the wear causes the pump life to decrease.

SUMMARY OF THE INVENTION

(1) Technical problems solved

In view of the deficiencies of the prior art, the present invention provides a low-loss gear pump and a processing method thereof, which solves the problem that the pressure in the oil pressure area of the currently used gear pump is greater than the pressure in the oil suction area, resulting in an unbalanced radial force of the hydraulic pump. As a result, the drive shaft will deviate from the oil suction area, causing the gear to scrape against the inner wall of the pump, affecting the normal operation of the pump, resulting in leakage, and wear and tear resulting in a decrease in the life of the pump.

(2) Technical solutions

In order to achieve the above purpose, the present invention is achieved through the following technical solutions: a low-loss gear pump, which specifically includes:

a casing, an oil outlet is arranged on one side of the casing, and an oil inlet is arranged on the side of the casing away from the oil outlet;

a base, the base is arranged at the bottom of the casing, and the top of the base is fixedly connected to the bottom of the casing;

a cavity, the cavity is arranged inside the casing, and the two sides of the cavity are respectively communicated with the oil outlet and the oil inlet;

The cavity includes:

a cavity shell, the top and bottom of the inner wall of the cavity shell are fixedly connected with an expansion cavity, and the bottom of the expansion cavity is provided with an expansion port;

an expansion bar, the expansion bar is arranged inside the expansion port and is slidably connected with the expansion port, the top of the expansion bar is fixedly connected with a first fixing bar, and the side surface of the first fixing bar is fixedly connected with the inner wall of the expansion port;

Electric heating body, the electric heating body is arranged inside the expansion cavity, the electric heating body is fixedly connected with the inner wall of the expansion cavity, and is provided with the expansion cavity and the electric heating body. Adjust the temperature of the electric heating body, squeeze the first fixing strip and the expansion strip through the volume of the thermal expansion medium, supplement the wear of the expansion strip through the displacement of the expansion strip, avoid the gap between the gear and the expansion strip, and ensure the working efficiency of the gear pump. Improve the service life of the gear pump;

There are two sets of gears, and the gears are symmetrically distributed inside the cavity housing. The center of the gears penetrates and is fixedly connected with a rotating shaft. One end of the rotating shaft penetrates the cavity housing and is fixedly connected with a driving gear.

There is a cavity. When in use, the external drive drives the drive gear to rotate, and the drive gear drives the gear to rotate through the rotating shaft. When the pressure difference between the oil inlet and the oil outlet causes the gear to shift, the gear and the expansion strip inside the expansion port rub And squeeze the expansion strip, the expansion strip can prevent the gear from contacting the inner wall of the cavity and cause wear, and one end of the expansion strip is squeezed, so that the thermal expansion medium inside the expansion cavity squeezes the other end of the expansion strip, and the other end of the expansion strip is squeezed. The pressure protrusion can supplement the gap caused by the offset on the other side of the gear, and the use is more secure and reliable.

Preferably, the cavity housing is arranged inside the housing and is fixedly connected with the inner wall of the housing, and the driving gear is arranged outside the housing.

Preferably, the expansion cavity is filled with a thermal expansion medium, and one end of the electric heating body is electrically connected to the gear control switch.

Preferably, the gear comprises a toothed plate, the side of the toothed plate is provided with meshing teeth, the end of the meshing tooth away from the toothed plate is provided with a rotating slot, the inner wall of the rotating slot is rotatably connected with a rolling column, and the outer side of the rolling column is rotatably connected. A sealing sleeve is sleeved and fixedly connected, and a gear is arranged. When the driving gear drives the gear to rotate through the rotating shaft, the toothed disc drives the rolling column to rotate through the meshing teeth. When the rolling column rotates, it rubs against the inside of the expansion bar and rotates inside the rotating groove. , can avoid the sliding friction between the meshing teeth and the expansion strip, it is convenient to reduce the wear of the expansion strip and meshing teeth, and it is convenient to improve the service life of the device, and only need to replace the sealing sleeve on the expansion strip and the rolling column during maintenance. Maintenance costs are low.

Preferably, the rotating shaft penetrates through the toothed disc and is fixedly connected to the toothed disc, and the bottom of the inner wall of the rotating groove is set in an arc shape adapted to the rolling column.

Preferably, the base includes an outer frame, two sides of the outer frame are fixedly connected with second fixing bars, the top of the second fixing bars is provided with fixing holes, and the top of the inner wall of the outer frame is fixedly connected with a support seat, so A buffer spring is fixedly connected to the bottom of the support seat, a rotating seat is fixedly connected to the bottom of the buffer spring, a threaded sleeve is rotatably connected to the bottom of the rotating seat, a fixing rod is threadedly connected inside the threaded sleeve, and the bottom of the fixing rod is threadedly connected. A fixed base is fixedly connected, and a base is provided. When the gear pump vibrates during operation, the vibration on the outer casing is transmitted to the outer frame, and the outer frame transmits the vibration to the second fixing bar and the support base, and the support base transmits the vibration. On the buffer spring, part of the vibration can be absorbed by the deformation of the buffer spring, which is convenient for shock absorption of the gear pump, reducing the vibration and wear of the gear pump during operation, and is provided with a threaded sleeve and a fixing rod, which can be driven to rotate by rotating the threaded sleeve. The seat moves up and down, which is convenient to change the compression degree of the buffer spring in the initial state, so that the buffer spring can always be pressed under the outer frame. When the bolts inside the fixing hole are loose due to vibration, the buffer spring can support the outer frame by its own elastic force. It is convenient to reduce the vibration amplitude of the outer frame.

Preferably, the top of the outer frame is fixedly connected to the bottom of the housing, the bottom of the second fixing strip is fixedly connected with a gasket, and the gasket at the bottom of the second fixing strip is provided with a through hole matching the fixing hole.

Preferably, the buffer springs are provided in multiple groups and are evenly distributed on the rotating seat, and a toggle rod is fixedly connected to the side of the threaded sleeve.

A processing method of a low-loss gear pump, comprising the following steps:

S1. When in use, the external drive drives the drive gear to rotate, and the drive gear drives the gear to rotate through the rotating shaft. When the pressure difference between the oil inlet and the oil outlet causes the gear to shift, the gear rubs and squeezes the expansion strip inside the expansion port. The expansion strip can be blocked by the expansion strip to prevent the gear from contacting the inner wall of the cavity and cause wear, and one end of the expansion strip is squeezed, so that the thermal expansion medium inside the expansion cavity squeezes the other end of the expansion strip, and the other end of the expansion strip is extruded and protruded. Complement the clearance on the other side of the gear due to offset;

S2. When the expansion strip is worn out after long-term use, the temperature of the electric heating body can be adjusted through the external gear control switch, the first fixing strip and the expansion strip can be squeezed by the volume of the thermal expansion medium, and the expansion strip can be supplemented by the displacement of the expansion strip. wear;

S3. When the gear pump vibrates during operation, the vibration on the outer casing is transmitted to the outer frame, the outer frame transmits the vibration to the second fixing bar and the support seat, and the support seat transmits the vibration to the buffer spring, which can be buffered The deformation of the spring absorbs part of the shock.

(3) Beneficial effects

The invention provides a low-loss gear pump and a processing method thereof. Has the following beneficial effects:

(1) The low-loss gear pump and its processing method are provided with a cavity. When in use, an external drive drives the drive gear to rotate, and the drive gear drives the gear to rotate through the rotating shaft. When the pressure difference causes the gear to shift, the gear rubs against the expansion strip inside the expansion port and squeezes the expansion strip, which can be blocked by the expansion strip to prevent the gear from contacting the inner wall of the cavity and cause wear, and one end of the expansion strip is squeezed, so that the inside of the expansion cavity is blocked. The heat expansion medium squeezes the other end of the expansion strip, and the other end of the expansion strip is extruded and protruded, which can supplement the gap caused by the offset on the other side of the gear, and the use is safer and more reliable.

(2) The low-loss gear pump and its processing method are provided with an expansion cavity and an electric heating body. When the expansion strip is worn after long-term use, the temperature of the electric heating body can be adjusted through the external gear control switch, The first fixing strip and the expansion strip are squeezed by the volume of the thermal expansion medium, and the wear of the expansion strip is supplemented by the displacement of the expansion strip, so as to avoid the gap between the gear and the expansion strip, which is convenient to ensure the working efficiency of the gear pump and improve the service life of the gear pump. .

(3) The low-loss gear pump and its processing method are provided with gears. When the driving gear drives the gear to rotate through the rotating shaft, the toothed disc drives the rolling column to rotate through the meshing teeth, and the rolling column rotates with the expansion bar at the same time. The inner friction and rotation inside the rotating groove can avoid sliding friction between the meshing teeth and the expansion bar, which is convenient to reduce the wear of the expansion strip and the meshing teeth, and it is convenient to improve the service life of the device. The sealing sleeve can be used, and the use and maintenance costs are low.

(4) The low-loss gear pump and its processing method are provided with a base. When the gear pump vibrates during operation, the vibration on the outer casing is transmitted to the outer frame, and the outer frame transmits the vibration to the second fixed On the bar and the support seat, the support seat transmits the vibration to the buffer spring, which can absorb part of the vibration through the deformation of the buffer spring, which is convenient for shock absorption of the gear pump and reduces the vibration and wear of the gear pump during operation, and is provided with a threaded sleeve and The fixed rod can drive the rotating seat to move up and down by rotating the threaded sleeve, which is convenient to change the compression degree of the buffer spring in the initial state, so that the buffer spring can always be pressed under the outer frame. When the bolt inside the fixing hole is loose due to vibration, the buffer The spring can support the outer frame by its own elastic force, which is convenient to reduce the vibration amplitude of the outer frame.

Description of drawings

Fig. 1 is the flow chart of the present invention;

Fig. 2 is the structural representation of the present invention;

Fig. 3 is the internal structure schematic diagram of the present invention;

4 is a schematic view of the cavity structure of the present invention;

FIG. 5 is a schematic diagram of the gear structure of the present invention;

FIG. 6 is a schematic diagram of the structure of the base of the present invention.

In the figure: 1. Shell; 2. Oil outlet; 3. Base; 31. Outer frame; 32. Second fixing strip; 33. Fixing hole; 34. Support seat; 35. Buffer spring; 36. Rotating seat; 37 , threaded sleeve; 38, fixed rod; 39, fixed seat; 4, cavity; 41, cavity shell; 42, expansion cavity; 43, expansion port; 44, expansion strip; 45, first fixed strip; 46, Heating body; 47, gear; 471, toothed plate; 472, meshing teeth; 473, rotating groove; 474, rolling column; 475, sealing sleeve; 48, rotating shaft; 49, driving gear; 5, oil inlet.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1:

2-4, the present invention provides a technical solution: a low-loss gear pump, which specifically includes:

A casing 1, an oil outlet 2 is arranged on one side of the casing 1, and an oil inlet 5 is arranged on the side of the casing 1 away from the oil outlet 2;

A base 3, the base 3 is arranged at the bottom of the casing 1, and the top of the base 3 is fixedly connected to the bottom of the casing 1;

A cavity 4, the cavity 4 is arranged inside the casing 1, and the two sides of the cavity 4 are respectively communicated with the oil outlet 2 and the oil inlet 5;

The low-loss gear pump is characterized in that the cavity 4 includes:

The cavity shell 41, the top and bottom of the inner wall of the cavity shell 41 are fixedly connected with an expansion cavity 42, and an expansion port 43 is opened at the bottom of the expansion cavity 42;

The expansion bar 44 is arranged inside the expansion port 43 and is slidably connected with the expansion port 43, the top of the expansion bar 44 is fixedly connected with a first fixing bar 45, and the side surface of the first fixing bar 45 is fixedly connected with the inner wall of the expansion port 43;

an electric heating body 46, the electric heating body 46 is arranged inside the expansion cavity 42, and the electric heating body 46 is fixedly connected with the inner wall of the expansion cavity 42;

The gear 47 is provided with two groups and is symmetrically distributed inside the cavity housing 41. The center of the gear 47 penetrates and is fixedly connected with a rotating shaft 48. One end of the rotating shaft 48 penetrates the cavity casing 41 and is fixedly connected with a driving gear 49.

The cavity casing 41 is disposed inside the casing 1 and is fixedly connected with the inner wall of the casing 1 , and the driving gear 49 is disposed outside the casing 1 .

The expansion cavity 42 is filled with a thermal expansion medium, and one end of the electric heating body 46 is electrically connected to the gear control switch.

A cavity 4 is provided. When in use, the external drive drives the drive gear 49 to rotate, and the drive gear 49 drives the gear 47 to rotate through the rotating shaft 48. When the pressure difference between the oil inlet 2 and the oil outlet 3 causes the gear 47 to shift, the gear 47 is displaced. 47 rubs against the expansion strip 44 inside the expansion port 43 and squeezes the expansion strip 44, which can be blocked by the expansion strip 44 to prevent the gear 47 from contacting the inner wall of the cavity 4 to cause wear and tear, and one end of the expansion strip 44 is squeezed, so that the interior of the expansion cavity 42 The heat expansion medium squeezes the other end of the expansion strip 44, and the other end of the expansion strip 44 is extruded and protruded, which can supplement the gap caused by the offset on the other side of the gear 47, and is safer and more reliable to use. The expansion cavity 42 and the electric heating body are provided. 46. When the expansion bar 44 is worn out after long-term use, the temperature of the electric heating body 46 can be adjusted through the external gear control switch, and the first fixing bar 45 and the expansion bar 44 are squeezed by the volume of the thermal expansion medium, and the expansion bar 44 The displacement supplements the wear of the expansion bar 44, avoids the gap between the gear 47 and the expansion bar 44, facilitates the working efficiency of the gear pump, and improves the service life of the gear pump.

Embodiment 2:

Referring to FIGS. 2-5, the present invention provides a technical solution on the basis of the first embodiment: the gear 47 includes a toothed plate 471, the side of the toothed plate 471 is provided with meshing teeth 472, and the end of the meshing tooth 472 away from the toothed plate 471 is provided with Rotating groove 473, the inner wall of the rotating groove 473 is rotatably connected with a rolling column 474, the outer side of the rolling column 474 is sleeved and fixedly connected with a sealing sleeve 475, the rotating shaft 48 penetrates the toothed plate 471 and is fixedly connected with the toothed plate 471, and the bottom of the inner wall of the rotating groove 473 is provided with a The arc shape matched with the rolling column 474 is provided with a gear 47. When the driving gear 49 drives the gear 47 to rotate through the rotating shaft 48, the toothed plate 471 drives the rolling column 474 to rotate through the meshing teeth 472, and the rolling column 474 rotates at the same time. The inner side of the expansion bar 44 rubs and rotates inside the rotating groove 473, which can avoid sliding friction between the meshing teeth 472 and the expansion strip 44, which is convenient to reduce the wear of the expansion strip 44 and the meshing teeth 472, and it is convenient to improve the service life of the device. The sealing sleeve 475 on the expansion bar 44 and the rolling column 474 only needs to be replaced, and the use and maintenance costs are low.

Embodiment three:

Referring to FIGS. 2-6, the present invention provides a technical solution on the basis of Embodiment 1 and Embodiment 2: the base 3 includes an outer frame 31, and both sides of the outer frame 31 are fixedly connected with second fixing bars 32, the second The top of the fixing bar 32 is provided with a fixing hole 33, the top of the inner wall of the outer frame 31 is fixedly connected with a support seat 34, the bottom of the support seat 34 is fixedly connected with a buffer spring 35, the bottom of the buffer spring 35 is fixedly connected with a rotating seat 36, and the bottom of the rotating seat 36 is rotatably connected There is a threaded sleeve 37, a fixing rod 38 is threadedly connected inside the threaded sleeve 37, a fixing seat 39 is fixedly connected to the bottom of the fixing rod 38, the top of the outer frame 31 is fixedly connected to the bottom of the casing 1, and the bottom of the second fixing strip 32 is fixedly connected with a pad. The gasket at the bottom of the second fixing bar 32 is provided with a through hole that matches the fixing hole 33, the buffer spring 35 is provided with multiple groups and is evenly distributed on the rotating seat 36, and the side of the threaded sleeve 37 is fixedly connected with a dial Move the lever.

The base 3 is provided. When the gear pump vibrates during operation, the vibration on the casing 1 is transmitted to the outer frame 31, and the outer frame 31 transmits the vibration to the second fixing bar 32 and the support seat 34, and the support seat 34 will vibrate. It is transmitted to the buffer spring 35, which can absorb part of the vibration through the deformation of the buffer spring 35, which is convenient for shock absorption of the gear pump and reduces the vibration and wear of the gear pump during operation. The threaded sleeve 37 drives the rotating seat 36 to move up and down, which is convenient for changing the compression degree of the buffer spring 35 in the initial state, so that the buffer spring 35 can always be pressed under the outer frame 31. When the bolt inside the fixing hole 33 is loose due to vibration, the buffer The spring 35 can support the outer frame 31 by its own elastic force, which is convenient to reduce the vibration amplitude of the outer frame 31 .

Embodiment 4:

Referring to FIG. 1, the present invention provides a processing method of a low-loss gear pump, comprising the following steps:

S1. When in use, the external drive drives the drive gear to rotate, and the drive gear drives the gear to rotate through the rotating shaft. When the pressure difference between the oil inlet and the oil outlet causes the gear to shift, the gear rubs and squeezes the expansion strip inside the expansion port. The expansion strip can be blocked by the expansion strip to prevent the gear from contacting the inner wall of the cavity and cause wear, and one end of the expansion strip is squeezed, so that the thermal expansion medium inside the expansion cavity squeezes the other end of the expansion strip, and the other end of the expansion strip is extruded and protruded. Complement the clearance on the other side of the gear due to offset;

S2. When the expansion strip is worn out after long-term use, the temperature of the electric heating body can be adjusted through the external gear control switch, the first fixing strip and the expansion strip can be squeezed by the volume of the thermal expansion medium, and the expansion strip can be supplemented by the displacement of the expansion strip. wear;

S3. When the gear pump vibrates during operation, the vibration on the outer casing is transmitted to the outer frame, the outer frame transmits the vibration to the second fixing bar and the support seat, and the support seat transmits the vibration to the buffer spring, which can be buffered The deformation of the spring absorbs part of the shock.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. A low-loss gear pump specifically comprises:

the oil-saving device comprises a shell (1), wherein an oil outlet (2) is formed in one side of the shell (1), and an oil inlet (5) is formed in one side, far away from the oil outlet (2), of the shell (1);

the base (3), the base (3) is set up in the bottom of the outer casing (1), the top of the said base (3) is fixedly connected with bottom of the outer casing (1);

the cavity (4) is arranged inside the shell (1), and two sides of the cavity (4) are respectively communicated with the oil outlet (2) and the oil inlet (5);

the low-loss gear pump is characterized in that: the cavity (4) comprises:

the top and the bottom of the inner wall of the cavity shell (41) are fixedly connected with an expansion cavity (42), and the bottom of the expansion cavity (42) is provided with an expansion port (43);

the expansion strip (44) is arranged inside the expansion port (43) and is in sliding connection with the expansion port (43), the top of the expansion strip (44) is fixedly connected with a first fixing strip (45), and the side surface of the first fixing strip (45) is fixedly connected with the inner wall of the expansion port (43);

the electric heating body (46), the electric heating body (46) is set up in expanding the cavity (42), the said electric heating body (46) and expanding the cavity (42) inner wall fixed connection;

the gear (47) is provided with two groups, the two groups of gears are vertically and symmetrically distributed in the cavity shell (41), the center position of the gear (47) penetrates through and is fixedly connected with a rotating shaft (48), and one end of the rotating shaft (48) penetrates through the cavity shell (41) and is fixedly connected with a driving gear (49);

the expansion cavity (42) is filled with a thermal expansion medium, and one end of the electric heating body (46) is electrically connected with the gear control switch;

the gear (47) comprises a fluted disc (471), the side face of the fluted disc (471) is provided with meshing teeth (472), one end, far away from the fluted disc (471), of each meshing tooth (472) is provided with a rotating groove (473), the inner wall of each rotating groove (473) is rotatably connected with a rolling column (474), and the outer side of each rolling column (474) is sleeved with and fixedly connected with a sealing sleeve (475);

the rotating shaft (48) penetrates through the fluted disc (471) and is fixedly connected with the fluted disc (471), and the bottom of the inner wall of the rotating groove (473) is set to be in an arc shape matched with the rolling column (474).

2. A low loss gear pump according to claim 1, wherein: the cavity shell (41) is arranged inside the shell (1) and fixedly connected with the inner wall of the shell (1), and the driving gear (49) is arranged outside the shell (1).

3. A low loss gear pump according to claim 1, wherein: base (3) are including outer frame (31), the equal fixedly connected with second fixed strip (32) in outer frame (31) both sides, fixed orifices (33) have been seted up at second fixed strip (32) top, outer frame (31) inner wall top fixedly connected with supporting seat (34), supporting seat (34) bottom fixedly connected with buffer spring (35), buffer spring (35) bottom fixedly connected with rotates seat (36), it is connected with threaded sleeve (37) to rotate seat (36) bottom rotation, threaded sleeve (37) internal thread is connected with dead lever (38), dead lever (38) bottom fixedly connected with fixing base (39).

4. A low loss gear pump according to claim 3, wherein: the top of the outer frame (31) is fixedly connected with the bottom of the shell (1), the bottom of the second fixing strip (32) is fixedly connected with a gasket, and a through hole matched with the fixing hole (33) is formed in the gasket at the bottom of the second fixing strip (32).

5. A low loss gear pump according to claim 3, wherein: buffer spring (35) are provided with the multiunit and evenly distributed on rotating seat (36), screw sleeve (37) side fixedly connected with poker rod.

6. A method of manufacturing a low loss gear pump according to claim 5, wherein: the method comprises the following steps:

s1, when the expansion joint is used, an external drive drives a driving gear to rotate, the driving gear drives the gear to rotate through a rotating shaft, when the gear deflects due to pressure difference generated between an oil inlet and an oil outlet, the gear rubs with an expansion strip inside an expansion port and extrudes the expansion strip, the gear is prevented from being in contact with the inner wall of a cavity body to generate abrasion through the obstruction of the expansion strip, one end of the expansion strip is extruded, a thermal expansion medium inside an expansion cavity extrudes the other end of the expansion strip, the other end of the expansion strip is extruded and protruded, and a gap generated by deflection at the other side of the gear is supplemented;

s2, when the expansion strip is worn after long-time use, the temperature of the electric heating body can be adjusted through the external gear control switch, the first fixing strip and the expansion strip are extruded through the volume of the thermal expansion medium, and the wear of the expansion strip is supplemented through the displacement of the expansion strip;

s3, when the gear pump generates vibration during operation, the vibration on the shell is transmitted to the outer frame, the outer frame transmits the vibration to the second fixing strip and the supporting seat, and the supporting seat transmits the vibration to the buffer spring, so that partial vibration can be absorbed through the deformation of the buffer spring.

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