Automatic pressure-dividing type four high-pressure gear pump

Abstract

This invention relates to the field of gear pump technology, specifically to an automatic pressure-dividing four-unit high-pressure gear pump. It solves the problem that existing four-unit gear pumps, during high-pressure liquid transport, cannot adjust the gear meshing degree, thus hindering stable transport of liquids with different viscosities and making it difficult to depressurize pump bodies with pressure differences. The automatic pressure-dividing four-unit high-pressure gear pump includes four pump bodies, a spacing adjustment mechanism, and a pressure-dividing connection mechanism. Two spacing adjustment mechanisms are installed on the inner side of one end of the four pump bodies, a separating transmission mechanism is installed on the inner side of the middle section of the four pump bodies, and a pressure-dividing connection mechanism is installed on the inner side of the other end of the four pump bodies. This invention, by adjusting the gear meshing degree of the four-unit gear pump, can achieve stable transport of liquids with different viscosities and can depressurize pump bodies with pressure differences, thereby improving transport efficiency.

Description

Technical Field

[0001] This invention relates to the field of gear pump technology, specifically to an automatic pressure-dividing type four-stage high-pressure gear pump. Background Technology

[0002] The four-gear pump is a commonly used hydraulic component, widely used in cranes, drilling rigs, construction machinery, and other fields. Its working principle relies on the change and movement of the working volume formed between the pump cylinder and the meshing gears to transport or pressurize liquids. Its structural features include two enclosed spaces composed of two gears, a pump body, and front and rear covers. When the gears rotate, the volume of the space on the disengaged side increases, creating a vacuum that draws in liquid. Conversely, the volume of the space on the meshing side decreases, forcing the liquid into the pipeline. The four-gear pump boasts advantages such as simple and compact structure, small size, light weight, good manufacturability, low price, strong self-priming force, insensitivity to oil contamination, wide speed range, resistance to impact loads, convenient maintenance, and reliable operation.

[0003] Existing four-gear pumps cannot adjust the meshing degree of the gears during high-pressure liquid transport, making it difficult to stably transport liquids of different viscosities and to reduce pressure between pump bodies with pressure differences. Therefore, they do not meet current requirements. To address this, we propose an automatic pressure-dividing four-gear pump. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic pressure-dividing four-stage high-pressure gear pump to solve the problems mentioned in the background art, such as the inability to adjust the meshing degree of the gears in the liquid being transported during high-pressure liquid transportation, which makes it inconvenient to stably transport liquids of different viscosities and to reduce pressure between pump bodies with pressure differences.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic pressure-dividing four-unit high-pressure gear pump, comprising a four-unit pump body, a spacing adjustment mechanism, and a pressure-dividing connection mechanism. Two spacing adjustment mechanisms are installed on the inner side of one end of the four-unit pump body, a separating transmission mechanism is installed on the inner side of the middle part of the four-unit pump body, and a pressure-dividing connection mechanism is installed on the inner side of the other end of the four-unit pump body. The four-unit pump body includes a first pump shell, a second pump shell is fixedly installed on one end of the first pump shell, a third pump shell is fixedly installed on one end of the second pump shell, and a fourth pump shell is fixedly installed on one end of the third pump shell.

[0006] The pressure-distributing connection mechanism includes a waist-shaped connecting plate, which is fixedly connected to both the third pump housing and the fourth pump housing. A pressure-distributing plate is fixedly installed on the inner side of the middle part of the waist-shaped connecting plate. A sealing plate is installed on one side of the pressure-distributing plate, a first pressure plate is installed on one side of the sealing plate, and a second pressure plate is fixedly installed on the other side of the pressure-distributing plate.

[0007] Preferably, the quadruple pump body further includes a first drive shaft and a first driven shaft rotatably connected to the first pump housing and the second pump housing. Two first conveying gears are fixedly installed in the middle of the first drive shaft and the first driven shaft. A second drive shaft and a second driven shaft are rotatably connected to the inner side of the third pump housing and the fourth pump housing. Two second conveying gears are fixedly installed in the middle of the second drive shaft and the second driven shaft. A first input end and a first output end are fixedly provided at the upper and lower ends of the first pump housing, a second input end and a second output end are fixedly provided at the upper and lower ends of the second pump housing, a third input end and a third output end are fixedly provided at the upper and lower ends of the third pump housing, and a fourth input end and a fourth output end are fixedly provided at the upper and lower ends of the fourth pump housing.

[0008] Preferably, the spacing adjustment mechanism includes two adjustment mounting seats, which are fixedly connected to both the first pump housing and the second pump housing. Each of the four corners on one side of the two adjustment mounting seats is provided with a guide groove. Four connecting sleeves are installed on the inner side of one end of the two adjustment mounting seats, and an adjustment column is installed on the inner side of two adjacent connecting sleeves.

[0009] Preferably, the separating transmission mechanism includes a separating keypad, which is fixedly connected to both the second pump housing and the third pump housing. A connecting shaft is rotatably connected to the inner side of the separating keypad, and a first transmission gear is fixedly provided at one end of the connecting shaft. A second transmission gear is fixedly provided at the end of the second drive shaft near the separating keypad.

[0010] Preferably, two adjacent first conveying gears are connected by inter-tooth meshing, two adjacent second conveying gears are connected by inter-tooth meshing, the first drive shaft and the second drive shaft both rotate clockwise, both ends of the first drive shaft and the first driven shaft are rotatably connected to the adjusting mounting seat through bearings, and both ends of the second drive shaft and the second driven shaft are rotatably connected to the third pump housing and the fourth pump housing through bearings.

[0011] Preferably, the end of the first drive shaft away from the partition keypad is connected to a motor via a coupling, and a sealing gasket is provided between the first pump housing and the second pump housing.

[0012] Preferably, the inner walls of the first pump housing and the second pump housing both extend to the inner side of the guide groove, the adjusting mounting seat is fixedly connected to the connecting sleeve, the two ends of the adjusting column are provided with external threads with opposite directions of rotation, the two ends of the adjusting column are threadedly connected to the two adjacent connecting sleeves, and the two adjacent adjusting mounting seats move in opposite or opposite directions along the axis of the adjusting column.

[0013] Preferably, one end of the connecting shaft passes through the partition keyboard and is fixedly connected to the first drive shaft. The connecting shaft is connected to the second drive shaft through a first transmission gear and a second transmission gear. The first transmission gear and the second transmission gear are connected by inter-tooth meshing. The second drive shaft passes through the second transmission gear and is rotatably connected to the partition keyboard.

[0014] Preferably, a sealing gasket is provided between the side of the waist-shaped connecting plate and the third pump housing and the fourth pump housing, the first pressure plate is fixed to the middle of the waist-shaped connecting plate by screws, and a sealing ring is provided between the first pressure plate and the sealing plate.

[0015] Preferably, both the pressure-reducing plate and the sealing plate are provided with multiple pressure-reducing holes on one side, and the multiple pressure-reducing holes are arranged circumferentially along the axis of the sealing plate, and the pressure-reducing plate is rotatably connected to the sealing plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention uses a first drive shaft and a first conveying gear to drive a first driven shaft to rotate synchronously. The first drive shaft and the first driven shaft then rotate through the meshing of two adjacent first conveying gears to pressurize and convey the contents of the first and second pump housings. The second drive shaft and the second driven shaft rotate through the meshing of two adjacent second conveying gears to pressurize and convey the contents of the third and fourth pump housings. This achieves a four-way pressurized conveying system. The adjusting column drives two adjusting mounting seats in the housing to slide relative to the first and second pump housings in opposite directions through the connecting sleeve. This allows the distance between the first drive shaft and the first driven shaft to be adjusted through the two adjacent adjusting mounting seats, thus satisfying the conveying operation of liquids with different viscosities.

[0018] 2. This invention adjusts the sealing plate according to the pressure values ​​inside the third and fourth pump housings. Specifically, multiple pressure-reducing holes are provided on one side of both the pressure-distributing plate and the sealing plate, and these holes are arranged circumferentially relative to the axis of the sealing plate. By rotating the sealing plate relative to the pressure-distributing plate, and then locking and fixing the sealing plate with the first pressure plate after adjustment, the stability of the sealing plate is maintained. This allows the adjustment of the degree of misalignment between the pressure-reducing holes on the sealing plate and the pressure-reducing holes on the pressure-distributing plate to adjust the degree of connection between the third and fourth pump housings, thereby satisfying the adjustment of the pressure difference between the third and fourth pump housings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a bottom view of the entire invention;

[0021] Figure 3 This is a schematic diagram of the structure of the first drive shaft of the present invention;

[0022] Figure 4 This is a schematic diagram of the installation structure of the separation transmission mechanism of the present invention;

[0023] Figure 5 This is a schematic diagram of the spacing adjustment mechanism of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the separation transmission mechanism of the present invention;

[0025] Figure 7 This is a side view of the pressure-dividing connection mechanism of the present invention;

[0026] Figure 8 This is an exploded structural diagram of the pressure-dividing connection mechanism of the present invention.

[0027] In the diagram: 1. Quadruple pump body; 101. First pump casing; 102. Second pump casing; 103. Third pump casing; 104. Fourth pump casing; 105. First input terminal; 106. Second input terminal; 107. Third input terminal; 108. Fourth input terminal; 109. First drive shaft; 110. Second drive shaft; 111. Second driven shaft; 112. First output terminal; 113. Second output terminal; 114. Third output terminal; 115. Fourth output terminal; 116. First driven shaft; 17. First conveying gear; 118. Second conveying gear; 2. Spacing adjustment mechanism; 201. Adjustment mounting base; 202. Guide slide; 203. Adjusting column; 204. Connecting sleeve; 3. Separating transmission mechanism; 301. Separating keypad; 302. Connecting shaft; 303. First transmission gear; 304. Second transmission gear; 4. Pressure dividing connection mechanism; 401. Waist-shaped connecting plate; 402. First pressure plate; 403. Sealing plate; 404. Pressure dividing plate; 405. Second pressure plate. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] Please see Figures 1 to 4An embodiment of the present invention provides an automatic pressure-dividing four-stage high-pressure gear pump, comprising a four-stage pump body 1, a spacing adjustment mechanism 2, and a pressure-dividing connection mechanism 4. Two spacing adjustment mechanisms 2 are installed on the inner side of one end of the four-stage pump body 1, a separating transmission mechanism 3 is installed on the inner side of the middle part of the four-stage pump body 1, and a pressure-dividing connection mechanism 4 is installed on the inner side of the other end of the four-stage pump body 1. The four-stage pump body 1 includes a first pump housing 101, a second pump housing 102 is fixedly installed at one end of the first pump housing 101, a sealing gasket is provided between the first pump housing 101 and the second pump housing 102, a third pump housing 103 is fixedly installed at one end of the second pump housing 102, and a fourth pump housing 104 is fixedly installed at one end of the third pump housing 103. The first pump housing 101, the second pump housing 102, the third pump housing 103, and the fourth pump housing 104 can realize four-way synchronous pressurization and delivery of liquid.

[0030] A first drive shaft 109 and a first driven shaft 116 are rotatably connected to the inner sides of the first pump housing 101 and the second pump housing 102. Two first conveying gears 117 are fixedly installed in the middle of the first drive shaft 109 and the first driven shaft 116. Adjacent first conveying gears 117 are connected by inter-tooth meshing. A second drive shaft 110 and a second driven shaft 111 are rotatably connected to the inner sides of the third pump housing 103 and the fourth pump housing 104. Both the first drive shaft 109 and the second drive shaft 110 rotate clockwise. Both ends of the second drive shaft 110 and the second driven shaft 111 are rotatably connected to the third pump housing 103 and the fourth pump housing 104 through bearings. The first drive shaft 109 and the first driven shaft 116 achieve pressurization and conveying of the interior of the first pump housing 101 and the second pump housing 102 through the meshing rotation of the two adjacent first conveying gears 117.

[0031] Two second conveying gears 118 are fixedly installed in the middle of the second drive shaft 110 and the second driven shaft 111. The two adjacent second conveying gears 118 are connected by inter-tooth meshing. The first pump housing 101 is fixedly provided with a first input end 105 and a first output end 112 at its upper and lower ends, respectively. The second pump housing 102 is fixedly provided with a second input end 106 and a second output end 113 at its upper and lower ends, respectively. The third pump housing 103 is fixedly provided with a third input end 107 and a third output end 114 at its upper and lower ends, respectively. The fourth pump housing 104 is fixedly provided with a fourth input end 108 and a fourth output end 115 at its upper and lower ends, respectively. The second drive shaft 110 and the second driven shaft 111 realize the pressurization and conveying of the interior of the third pump housing 103 and the fourth pump housing 104 by the meshing and rotation of the two adjacent second conveying gears 118.

[0032] Please see Figure 7 and Figure 8The pressure-dividing connection mechanism 4 includes a waist-shaped connecting plate 401, which is fixedly connected to the third pump housing 103 and the fourth pump housing 104. A sealing gasket is provided between the side of the waist-shaped connecting plate 401 and the third pump housing 103 and the fourth pump housing 104. A pressure-dividing plate 404 is fixedly installed on the inner side of the middle part of the waist-shaped connecting plate 401. A sealing plate 403 is installed on one side of the pressure-dividing plate 404. Multiple pressure-reducing holes are provided on one side of both the pressure-dividing plate 404 and the sealing plate 403. The multiple pressure-reducing holes are arranged circumferentially along the axis of the sealing plate 403. The pressure-dividing plate 404 and the sealing plate 403 are rotatably connected. By rotating and adjusting the sealing plate 403 relative to the pressure-dividing plate 404, the degree of misalignment between the pressure-reducing holes on the sealing plate 403 and the pressure-reducing holes on the pressure-dividing plate 404 can be adjusted to achieve the adjustment of the pressure difference between the third pump housing 103 and the fourth pump housing 104.

[0033] A first pressure plate 402 is installed on one side of the sealing plate 403. A sealing ring is provided between the first pressure plate 402 and the sealing plate 403. The first pressure plate 402 is fixedly connected to the middle of the waist-shaped connecting plate 401 by screws. A second pressure plate 405 is fixedly installed on the other side of the pressure plate 404. The sealing plate 403 is locked and fixed by the first pressure plate 402 to maintain the stability of the sealing plate 403.

[0034] Please see Figure 3 and Figure 5 The spacing adjustment mechanism 2 includes two adjustment mounting seats 201. The adjustment mounting seats 201 are fixedly connected to the first pump housing 101 and the second pump housing 102. Both ends of the first drive shaft 109 and the first driven shaft 116 are rotatably connected to the adjustment mounting seats 201 through bearings. The adjustment mounting seats 201 provide rotational support for the first drive shaft 109 and the first driven shaft 116, thereby maintaining the stability of the operation of the first drive shaft 109 and the first driven shaft 116.

[0035] Each of the four corners of one side of the two adjusting mounting seats 201 is provided with a guide groove 202. The inner walls of the first pump housing 101 and the second pump housing 102 extend to the inner side of the guide groove 202. Four connecting sleeves 204 are installed on the inner side of one end of the two adjusting mounting seats 201. The adjusting mounting seats 201 are fixedly connected to the connecting sleeves 204. An adjusting column 203 is installed on the inner side of two adjacent connecting sleeves 204. The two ends of the adjusting column 203 are provided with external threads with opposite directions of rotation. The two ends of the adjusting column 203 are threadedly connected to the two adjacent connecting sleeves 204. The two adjacent adjusting mounting seats 201 move in opposite directions along the axis of the adjusting column 203. The distance between the first drive shaft 109 and the first driven shaft 116 can be adjusted by the two adjacent adjusting mounting seats 201 to meet the conveying operation of liquids with different viscosities.

[0036] Please see Figure 6The separation transmission mechanism 3 includes a separation keypad 301, which is fixedly connected to the second pump housing 102 and the third pump housing 103. The end of the first drive shaft 109 away from the separation keypad 301 is connected to a motor via a coupling. The inner side of the separation keypad 301 is rotatably connected to a connecting shaft 302, one end of which passes through the separation keypad 301 and is fixedly connected to the first drive shaft 109. The separation keypad 301 separates the second pump housing 102 and the third pump housing 103 and provides positioning support for the connecting shaft 302.

[0037] A first transmission gear 303 is fixedly provided at one end of the connecting shaft 302, and a second transmission gear 304 is fixedly provided at one end of the second drive shaft 110 near the partition keypad 301. The connecting shaft 302 and the second drive shaft 110 are connected through the first transmission gear 303 and the second transmission gear 304. The first transmission gear 303 and the second transmission gear 304 are connected by inter-tooth meshing. The second drive shaft 110 passes through the second transmission gear 304 and is rotatably connected to the partition keypad 301. The first drive shaft 109 drives the first transmission gear 303 and the second transmission gear 304 to mesh and rotate through the connecting shaft 302. In turn, the second transmission gear 304 drives the second driven shaft 111 to rotate synchronously through the second drive shaft 110 and the second conveying gear 118.

[0038] In summary, the first input terminal 105, the second input terminal 106, the third input terminal 107, the fourth input terminal 108, the first output terminal 112, the second output terminal 113, the third output terminal 114, and the fourth output terminal 115 are all connected to pipelines. The first drive shaft 109 is connected to the motor through a coupling. When the power is turned on and the motor is started, the motor drives the first driven shaft 116 to rotate synchronously through the first drive shaft 109 and the first conveying gear 117. Then, the first drive shaft 109 and the first driven shaft 116 achieve pressurized conveying of the inside of the first pump housing 101 and the second pump housing 102 through the meshing rotation of two adjacent first conveying gears 117.

[0039] Meanwhile, one end of the connecting shaft 302 passes through the partition keypad 301 and is fixedly connected to the first drive shaft 109, so that the first drive shaft 109 drives the first transmission gear 303 and the second transmission gear 304 to mesh and rotate through the connecting shaft 302. Then, the second transmission gear 304 drives the second driven shaft 111 to rotate synchronously through the second drive shaft 110 and the second conveying gear 118. The second drive shaft 110 and the second driven shaft 111 mesh and rotate through two adjacent second conveying gears 118 to achieve pressurized conveying inside the third pump housing 103 and the fourth pump housing 104, thereby realizing four-way pressurized conveying as a whole.

[0040] Before pressurized conveying, the spacing adjustment mechanism 2 is adjusted according to the meshing degree between two adjacent first conveying gears 117. Specifically, by rotating the adjustment column 203, the adjustment column 203 drives the two adjustment mounting seats 201 to slide relative to the first pump housing 101 and the second pump housing 102 in opposite or opposite directions through the connecting sleeve 204. Thus, the spacing between the first drive shaft 109 and the first driven shaft 116 is adjusted through the two adjacent adjustment mounting seats 201 to meet the conveying operation of liquids with different viscosities. After adjusting the adjustment mounting seats 201, the adjustment mounting seats 201 are fixedly connected to the first pump housing 101 and the second pump housing 102 by screws to maintain the stability of the rotation of the first drive shaft 109 and the first driven shaft 116.

[0041] The sealing plate 403 is adjusted according to the pressure values ​​inside the third pump housing 103 and the fourth pump housing 104. Specifically, multiple pressure-reducing holes are provided on one side of both the pressure-distributing plate 404 and the sealing plate 403, and the multiple pressure-reducing holes are arranged in a circle relative to the axis of the sealing plate 403. The sealing plate 403 is rotated relative to the pressure-distributing plate 404 for adjustment, and after adjustment, the sealing plate 403 is locked and fixed by the first pressure plate 402 to maintain the stability of the sealing plate 403. This allows the adjustment of the degree of misalignment between the pressure-reducing holes on the sealing plate 403 and the pressure-reducing holes on the pressure-distributing plate 404 to adjust the degree of connection between the third pump housing 103 and the fourth pump housing 104, thereby satisfying the adjustment of the pressure difference between the third pump housing 103 and the fourth pump housing 104.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An automatic pressure-dividing four-unit high-pressure gear pump, comprising a four-unit pump body (1), a spacing adjustment mechanism (2), and a pressure-dividing connection mechanism (4), characterized in that: Two spacing adjustment mechanisms (2) are installed on the inner side of one end of the four-unit pump body (1), a separation transmission mechanism (3) is installed on the inner side of the middle part of the four-unit pump body (1), a pressure dividing connection mechanism (4) is installed on the inner side of the other end of the four-unit pump body (1), the four-unit pump body (1) includes a first pump shell (101), a second pump shell (102) is fixedly installed on one end of the first pump shell (101), a third pump shell (103) is fixedly installed on one end of the second pump shell (102), and a fourth pump shell (104) is fixedly installed on one end of the third pump shell (103). The pressure-distributing connection mechanism (4) includes a waist-shaped connecting plate (401), which is fixedly connected to the third pump housing (103) and the fourth pump housing (104). A pressure-distributing plate (404) is fixedly installed on the inner side of the middle part of the waist-shaped connecting plate (401). A sealing plate (403) is installed on one side of the pressure-distributing plate (404), a first pressure plate (402) is installed on one side of the sealing plate (403), and a second pressure plate (405) is fixedly installed on the other side of the pressure-distributing plate (404).

2. The automatic pressure-dividing type four-stage high-pressure gear pump according to claim 1, characterized in that: The quadruple pump body (1) further includes a first drive shaft (109) and a first driven shaft (116) rotatably connected to the first pump housing (101) and the second pump housing (102). Two first conveying gears (117) are fixedly installed in the middle of both the first drive shaft (109) and the first driven shaft (116). A second drive shaft (110) and a second driven shaft (111) are rotatably connected to the inner sides of the third pump housing (103) and the fourth pump housing (104). The middle of both the second drive shaft (110) and the second driven shaft (111) are fixedly installed... There are two second conveying gears (118). The first pump housing (101) is fixedly provided with a first input end (105) and a first output end (112) at its upper and lower ends, respectively. The second pump housing (102) is fixedly provided with a second input end (106) and a second output end (113) at its upper and lower ends, respectively. The third pump housing (103) is fixedly provided with a third input end (107) and a third output end (114) at its upper and lower ends, respectively. The fourth pump housing (104) is fixedly provided with a fourth input end (108) and a fourth output end (115) at its upper and lower ends, respectively.

3. The automatic pressure-dividing type four-stage high-pressure gear pump according to claim 2, characterized in that: The spacing adjustment mechanism (2) includes two adjustment mounting seats (201). The adjustment mounting seats (201) are fixedly connected to the first pump housing (101) and the second pump housing (102). The four end corners of one side of the two adjustment mounting seats (201) are provided with guide grooves (202). Four connecting sleeves (204) are installed on the inner side of one end of the two adjustment mounting seats (201). An adjustment column (203) is installed on the inner side of two adjacent connecting sleeves (204).

4. The automatic pressure-dividing type four-stage high-pressure gear pump according to claim 2, characterized in that: The separation transmission mechanism (3) includes a separation keypad (301), which is fixedly connected to the second pump housing (102) and the third pump housing (103). A connecting shaft (302) is rotatably connected to the inner side of the separation keypad (301). A first transmission gear (303) is fixedly provided at one end of the connecting shaft (302), and a second transmission gear (304) is fixedly provided at the end of the second drive shaft (110) near the separation keypad (301).

5. The automatic pressure-dividing type four-stage high-pressure gear pump according to claim 2, characterized in that: The two adjacent first conveying gears (117) are connected by inter-tooth meshing, and the two adjacent second conveying gears (118) are connected by inter-tooth meshing. The first drive shaft (109) and the second drive shaft (110) both rotate clockwise. The two ends of the first drive shaft (109) and the first driven shaft (116) are rotatably connected to the adjusting mounting base (201) through bearings. The two ends of the second drive shaft (110) and the second driven shaft (111) are rotatably connected to the third pump housing (103) and the fourth pump housing (104) through bearings.

6. The automatic pressure-dividing type four-stage high-pressure gear pump according to claim 4, characterized in that: The end of the first drive shaft (109) away from the partition keypad (301) is connected to a motor via a coupling, and a sealing gasket is provided between the first pump housing (101) and the second pump housing (102).

7. The automatic pressure-dividing type four-stage high-pressure gear pump according to claim 3, characterized in that: The inner walls of the first pump housing (101) and the second pump housing (102) both extend to the inner side of the guide groove (202). The adjusting mounting seat (201) is fixedly connected to the connecting sleeve (204). The two ends of the adjusting column (203) are provided with external threads with opposite directions of rotation. The two ends of the adjusting column (203) are threadedly connected to the two adjacent connecting sleeves (204). The two adjacent adjusting mounting seats (201) move in opposite or opposite directions along the axis of the adjusting column (203).

8. An automatic pressure-dividing type four-stage high-pressure gear pump according to claim 4, characterized in that: One end of the connecting shaft (302) passes through the partition keypad (301) and is fixedly connected to the first drive shaft (109). The connecting shaft (302) and the second drive shaft (110) are connected through the first transmission gear (303) and the second transmission gear (304). The first transmission gear (303) and the second transmission gear (304) are connected by inter-tooth meshing. The second drive shaft (110) passes through the second transmission gear (304) and is rotatably connected to the partition keypad (301).

9. An automatic pressure-dividing type four-stage high-pressure gear pump according to claim 2, characterized in that: The side of the waist-shaped connecting plate (401) is provided with a sealing gasket between it and the third pump housing (103) and the fourth pump housing (104). The first pressure plate (402) is fixed to the middle of the waist-shaped connecting plate (401) by screws. A sealing ring is provided between the first pressure plate (402) and the sealing plate (403).

10. An automatic pressure-dividing type four-stage high-pressure gear pump according to claim 9+, characterized in that: The pressure-reducing plate (404) and the sealing plate (403) are each provided with multiple pressure-reducing holes on one side. The multiple pressure-reducing holes are arranged in a circle along the axis of the sealing plate (403). The pressure-reducing plate (404) and the sealing plate (403) are rotatably connected.

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