Reciprocating plunger pump cylinder friction wear test device

Abstract

The invention discloses a reciprocating type plunger pump cylinder friction wear test device, and belongs to the technical field of mechanical engineering, the reciprocating type plunger pump cylinder friction wear test device comprises a box body and a plunger pump, the plunger pump comprises a pump body and a pump plug slidably installed in the pump body, and the reciprocating type plunger pump cylinder friction wear test device further comprises a transmission assembly comprising a transverse driving assembly, a longitudinal driving assembly and a sliding seat, the transverse driving assembly is arranged in the box body and drives the sliding seat to move transversely, and the longitudinal driving assembly is arranged on the sliding seat; and a movable plate and a clamping assembly. According to the invention, after primary detection, the pump plug of the plunger pump to be detected can be detached, and then the standard component is installed for secondary detection, so that the wear of the pump plug of the plunger pump to be detected is ensured not to cause interference on the frictional wear of the pump body, the data error is reduced, and the accuracy of the detection result is improved through two data comparison. The friction wear degree of the pump body and the pump plug can be analyzed respectively, and compared with the prior art, the detection capability is better.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical engineering, in particular to a reciprocating plunger pump barrel friction and wear testing device. Background Art

[0002] The Chinese invention patent with authorization announcement number CN103822840B discloses a reciprocating plunger pump barrel friction and wear test device, which uses a load sensor to transmit the weak signal of the mutual friction between the plunger and the pump barrel to the measurement control card, thereby realizing the detection of the friction and wear of the plunger pump barrel, and can detect four groups at the same time.

[0003] However, the above-mentioned prior art has the following disadvantages: first, it is difficult to eliminate the interference of the plunger when detecting the degree of wear of the plunger pump barrel, because the plunger may also be worn during long-term use, so the detection of the plunger pump barrel may cause errors; secondly, although the four groups can be detected at the same time, it is necessary to install the four groups in sequence and then detect them at the same time. After the detection is completed, the four groups are removed together, and then the four groups are installed in the above manner, and the operating efficiency is low.

[0004] Therefore, we proposed a reciprocating piston pump barrel friction and wear test device to solve the above problems.

[0005] The above information disclosed in this background technology is only used to increase the understanding of the background technology of the present invention and therefore, it may include information that does not constitute the prior art known to ordinary technicians in this field. Summary of the invention

[0006] The purpose of the present invention is to provide a reciprocating plunger pump barrel friction and wear testing device to solve the problems in the current market raised by the above background technology.

[0007] To achieve the above object, the present invention provides a reciprocating plunger pump barrel friction and wear test device, comprising a box body and a plunger pump, wherein the plunger pump comprises a pump body and a pump plug slidably mounted in the pump body, and further comprises:

[0008] The transmission assembly comprises a transverse driving assembly, a longitudinal driving assembly and a sliding seat, wherein the transverse driving assembly is arranged in the box body and drives the sliding seat to move transversely, and the longitudinal driving assembly is arranged on the sliding seat;

[0009] A movable plate and a clamping assembly, wherein the longitudinal driving assembly drives the movable plate to vertically reciprocate, and the clamping assembly is arranged on the movable plate, and the clamping assembly clamps the head of the pump plug;

[0010] The detection assembly includes a load sensor, a detection box, a temperature sensor, a standard part and a heating rod, all of which are arranged in the box, and the load sensor is arranged between the movable plate and the clamping assembly;

[0011] An oil filling assembly is arranged in the box body and is connected with the detection box;

[0012] The detection box includes an outer cylinder and a second motor, a rotating plate is rotatably connected in the outer cylinder, a partition plate is provided on the rotating plate, and the partition plate is a "Y"-shaped structure, the outer cylinder is provided with an opening, the second motor is arranged in the box body, and the output shaft penetrates into the outer cylinder and is fixed to the rotating plate;

[0013] The three chambers formed by the outer cylinder and the partition plate are each provided with a mounting seat, and the mounting seat and the pump body are fastened by bolts;

[0014] The temperature sensor and the heating rod are provided in three groups, which are respectively plugged into the three blades of the partition plate;

[0015] The box body is also provided with two groups of placement seats, and the standard parts and the placement seats are adapted to each other.

[0016] Preferably, the box body comprises an upper working room and a lower working room, and the upper working room is provided with a front door and side doors on both sides;

[0017] The second motor is arranged in the lower working chamber, and the outer cylinder is arranged in the upper working chamber.

[0018] Preferably, the transverse drive assembly, longitudinal drive assembly, sliding seat, movable plate, clamping assembly, and load sensor are each provided in two groups and are symmetrically installed in the upper working room.

[0019] Preferably, the lateral drive assembly comprises a crossbeam and an electric push rod, and the crossbeam is fixedly mounted on the top of the inner cavity of the upper working chamber;

[0020] The sliding seat is fixed to the output end of the electric push rod, and the sliding seat is slidably mounted on the crossbeam.

[0021] Preferably, the longitudinal drive assembly comprises a first motor, a ball screw and a guide rod;

[0022] The first motor is arranged in the sliding seat, and the output shaft passes through the outside of the sliding seat and is fixed to the ball screw;

[0023] The guide rod is fixedly mounted on the bottom of the sliding seat and is installed parallel to the ball screw;

[0024] The nut pair of the movable plate is threadedly connected with the ball screw, and the movable plate is penetrated on the guide rod.

[0025] Preferably, the clamping assembly comprises a clamping plate, two groups of cylinders and a clamp;

[0026] The load sensor is arranged between the clamping plate and the movable plate;

[0027] The two groups of cylinders are symmetrically mounted on the clamping plate, and the clamps have two groups, which are respectively fixed to the output ends of the two groups of cylinders;

[0028] The pump plug is arranged between two sets of clamps;

[0029] The maximum displacement of the clamping plate along the ball screw is greater than the length of the pump plug.

[0030] Preferably, the oil injection assembly includes an oil tank, an oil pump, an oil inlet pipe and an oil outlet pipe;

[0031] The oil tank is arranged in the lower working chamber, the oil pump is arranged in the oil tank, one end of the oil inlet pipe is connected to the oil pump, and the other end is connected to one of the chambers formed by the outer cylinder and the partition plate;

[0032] One end of the oil outlet pipe is communicated with the oil tank, and the other end is communicated with the outer cylinder and another chamber formed by the partition plate.

[0033] Preferably, the detection box further comprises a universal wheel mounted on the rotating plate and in contact with the upper surface of the outer cylinder.

[0034] Preferably, the arc of the opening of the outer cylinder is less than one hundred and twenty degrees.

[0035] Preferably, the outer cylinder, the rotating plate and the partition plate are sealed together.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] (1) The present invention realizes the detection of the degree of friction and wear of the pump body through the cooperation of the transverse drive component, the longitudinal drive component, the clamping component and the load sensor, wherein the longitudinal drive component drives the pump plug to reciprocate vertically, and after the load sensor detects the friction data, it transmits it to an external computer or other device with the ability to store information. After the initial detection, the pump plug of the plunger pump to be detected can be removed, and then the standard part can be installed for re-detection to ensure that the wear of the pump plug of the plunger pump to be detected does not interfere with the friction and wear detection of the pump body, thereby reducing the error of the data. In addition, by comparing the data twice, the degree of friction and wear of the pump body and the pump plug can be analyzed respectively, and the detection capability is better than that of the prior art.

[0038] (2) The present invention can realize continuous detection of the plunger pump through the operation of the detection box. During the detection, one chamber of the detection box is used for initial detection, and the other chamber is used for detection using standard parts. The opening of the outer cylinder is used to disassemble the detected plunger pump and install the plunger pump to be detected, so that the operation can be realized without stopping the machine. Compared with the prior art, its detection efficiency is higher.

[0039] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 for Figure 1 Schematic diagram of the structure that hides the front door;

[0042] Figure 3 for Figure 2 Schematic diagram of the structure after hiding one of the beams;

[0043] Figure 4 This is a schematic diagram of the structure of the present invention after the box is hidden;

[0044] Figure 5 is a three-dimensional cross-sectional view of the detection box of the present invention;

[0045] Figure 6 It is a schematic diagram of the internal structure of the oil injection assembly of the present invention;

[0046] Figure 7 for Figure 2 A magnified view of the structure at center A;

[0047] Figure 8 for Figure 4 A magnified view of the structure at point B.

[0048] In the figure: 1, box; 2, horizontal drive assembly; 3, longitudinal drive assembly; 4, sliding seat; 5, movable plate; 6, clamping assembly; 7, load sensor; 8, plunger pump; 9, detection box; 10, temperature sensor; 11, standard parts; 12, heating rod; 13, oil injection assembly; 14, placement seat; 15, bolts;

[0049] 101. Upper studio; 102. Lower studio; 103. Front door; 104. Side door;

[0050] 201, beam; 202, electric push rod;

[0051] 301, first motor; 302, ball screw; 303, guide rod;

[0052] 601, clamping plate; 602, cylinder; 603, fixture;

[0053] 801, pump body; 802, pump plug;

[0054] 901, outer cylinder; 902, rotating plate; 903, partition plate; 904, mounting seat; 905, opening; 906, second motor; 907, universal wheel;

[0055] 1301. Oil tank; 1302. Oil pump; 1303. Oil inlet pipe; 1304. Oil outlet pipe. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. It should be pointed out that the drawings are schematic and not drawn to scale. For the sake of clarity and convenience in the figures, the relative sizes and proportions of the parts shown in the figures are exaggerated or reduced in size, and any size is only exemplary and not restrictive.

[0057] See also Figure 1-Figure 8 A reciprocating plunger pump barrel friction and wear test device, comprising: a box body 1 and a plunger pump 8, the plunger pump 8 comprising a pump body 801 and a pump plug 802 slidably mounted in the pump body 801, and also comprising: a transmission assembly, comprising a transverse drive assembly 2, a longitudinal drive assembly 3, and a sliding seat 4, the transverse drive assembly 2 is arranged in the box body 1, and drives the sliding seat 4 to move transversely, and the longitudinal drive assembly 3 is arranged on the sliding seat 4; a movable plate 5 and a clamping assembly 6, the longitudinal drive assembly 3 drives the movable plate 5 to reciprocate vertically, the clamping assembly 6 is arranged on the movable plate 5, and the clamping assembly 6 clamps the head of the pump plug 802; a detection assembly, comprising a load sensor 7, a detection box 9, a temperature sensor 10, a standard part 11 and a heating rod 12, all of which are arranged in the box body 1, and the load sensor 7 is arranged between the movable plate 5 and the clamping assembly 6; an oil injection assembly 13, which is arranged in the box body 1 and communicates with the detection box 9;

[0058] By adopting the above technical solution, the clamping assembly 6 stably clamps the pump plug 802, and the pump plug 802 is driven to move in the vertical direction through the longitudinal driving assembly 3. The load sensor 7 is used for detection to obtain test data.

[0059] The detection box 9 includes an outer cylinder 901 and a second motor 906. The outer cylinder 901 is rotatably connected with a rotating plate 902. The rotating plate 902 is provided with a partition plate 903. The partition plate 903 is a "Y"-shaped structure. The outer cylinder 901 is provided with an opening 905. The second motor 906 is arranged in the box body 1, and the output shaft penetrates into the outer cylinder 901 and is fixed to the rotating plate 902. The three chambers formed by the outer cylinder 901 and the partition plate 903 are provided with a mounting seat 904. The mounting seat 904 and the pump body 801 are connected. Fastened by bolts 15, the temperature sensor 10 and the heating rod 12 are each provided with three groups, which are respectively plugged into the three blades of the partition plate 903. Two groups of placement seats 14 are also provided in the box body 1. The standard parts 11 and the placement seats 14 are adapted to each other. The detection box 9 also includes a universal wheel 907, which is installed on the rotating plate 902 and contacts the upper surface of the outer cylinder 901. The arc of the opening 905 opened by the outer cylinder 901 is less than one hundred and twenty degrees. The outer cylinder 901, the rotating plate 902 and the partition plate 903 are sealed together.

[0060] By adopting the above technical solution, when in use, the pump body 801 is first installed through the opening 905 on the outer cylinder 901 and fastened by the bolt 15. Then, after the rotating plate 902 rotates 120 degrees, the pump body 801 reaches the bottom of the clamping assembly 6, and the pump plug 802 is clamped by the clamping assembly 6. Then, the longitudinal driving assembly 3 drives the pump plug 802 to reciprocate in the vertical direction, and the corresponding data can be recorded by the load sensor 7. In order to eliminate the error caused by the wear degree of the pump plug 802 when detecting the wear degree of the pump body 801, the pump plug 802 is firstly tested. After the test, the pump plug 802 is moved to one of the placement seats 14 through the cooperation of the longitudinal drive assembly 3 and the transverse drive assembly 2, and then the rotating plate 902 is rotated one hundred and twenty degrees again. Through the mutual cooperation of the transverse drive assembly 2, the longitudinal drive assembly 3 and the clamping assembly 6, the standard part 11 located on one of the placement seats 14 is clamped and sent into the pump body 801 to be tested. The test is performed in the same way to determine whether the pump plug 802 of the plunger pump 8 to be tested affects the test, thereby improving the accuracy of the obtained data.

[0061] The housing 1 includes an upper working room 101 and a lower working room 102 . The upper working room 101 is provided with a front door 103 and side doors 104 on both sides. The second motor 906 is provided in the lower working room 102 , and the outer cylinder 901 is provided in the upper working room 101 .

[0062] The transverse driving assembly 2 includes a crossbeam 201 and an electric push rod 202 . The crossbeam 201 is fixedly mounted on the top of the inner cavity of the upper working chamber 101 . The sliding seat 4 is fixed to the output end of the electric push rod 202 . The sliding seat 4 is slidably mounted on the crossbeam 201 .

[0063] The longitudinal drive assembly 3 includes a first motor 301, a ball screw 302 and a guide rod 303. The first motor 301 is arranged in the sliding seat 4, and the output shaft passes through the outside of the sliding seat 4 and is fixed to the ball screw 302. The guide rod 303 is fixedly installed at the bottom of the sliding seat 4 and is installed parallel to the ball screw 302. The nut pair of the movable plate 5 is threadedly connected to the ball screw 302, and the movable plate 5 is passed through the guide rod 303.

[0064] The clamping assembly 6 includes a clamping plate 601, two groups of cylinders 602 and a clamp 603. The load sensor 7 is arranged between the clamping plate 601 and the movable plate 5. The two groups of cylinders 602 are symmetrically installed on the clamping plate 601. The clamp 603 has two groups and is respectively fixed to the output ends of the two groups of cylinders 602. The pump plug 802 is arranged between the two groups of clamps 603. The maximum displacement of the clamping plate 601 along the ball screw 302 is greater than the length of the pump plug 802.

[0065] The oil filling assembly 13 includes an oil tank 1301, an oil pump 1302, an oil inlet pipe 1303 and an oil outlet pipe 1304. The oil tank 1301 is arranged in the lower working room 102, and the oil pump 1302 is arranged in the oil tank 1301. One end of the oil inlet pipe 1303 is connected to the oil pump 1302, and the other end is connected to one of the chambers formed by the outer cylinder 901 and the partition plate 903. One end of the oil outlet pipe 1304 is connected to the oil tank 1301, and the other end is connected to the other chamber formed by the outer cylinder 901 and the partition plate 903.

[0066] By adopting the above technical scheme, oil circulation can be achieved during use. Before using the pump body 801 and pump plug 802 to be tested for testing, oil is injected into the chamber formed by the outer cylinder 901, the rotating plate 902 and the partition plate 903 and heated. After the initial test is completed, the partition plate 903 is rotated one hundred and twenty degrees, and the pump body 801 to be tested and the standard part 11 are used to perform the test again. After the test, the oil in the chamber flows into the oil tank 1301 through the oil outlet pipe 1304.

[0067] Among them, a control valve, such as a solenoid valve or other equipment, is installed on the oil outlet pipe 1304 , and after being tested using the standard component 11 , the oil is controlled to enter the oil tank 1301 .

[0068] It should be pointed out that the current reciprocating piston pump is usually installed by bolts in the scene where it needs to be used. Therefore, the reciprocating piston pump usually has a base with bolt holes. In addition, since the piston pump needs to be repaired, the end cover of the pump body 801 is usually detachable. When performing inspection, the end cover of the pump body 801 needs to be removed.

[0069] Embodiment 2:

[0070] The difference from Example 1 is that the transverse drive assembly 2 , the longitudinal drive assembly 3 , the sliding seat 4 , the movable plate 5 , the clamping assembly 6 , and the load sensor 7 are all provided in two groups and are symmetrically installed in the upper working room 101 .

[0071] By adopting the above technical solution, the continuous working ability of the device is improved, and multiple groups of tests can be carried out simultaneously when in use, wherein: one of the two chambers formed by the partition plate 903 and the outer cylinder 901 is used for initial testing, and the other is used for testing using the standard part 11, and at the opening of the outer cylinder 901, the operator disassembles the tested pump body 801 and installs the pump body 801 to be tested, thereby improving work efficiency.

[0072] Embodiment 3:

[0073] The difference from Example 1 is that the transverse drive assembly 2 and the longitudinal drive assembly 3 can be other types of linear drive devices in the prior art, such as hydraulic mechanisms, synchronous belts, etc.

[0074] Working principle: When in use, first open the front door 103, install the plunger pump 8 to be tested on the mounting seat 904 at the opening 905 through the bolts 15, and then control the second motor 906 to make the rotating plate 902 rotate one hundred and twenty degrees for the initial detection. The chamber formed by the outer cylinder 901, the rotating plate 902, and the partition plate 903 is filled with oil through the oil pump 1302, and heated by the heating rod 12. The temperature reading is obtained by the temperature sensor 10 and transmitted to the outside. When the detection temperature is reached, the clamping component 6 is controlled to clamp the pump plug 802, and the longitudinal drive component 3 drives the pump plug 802 to reciprocate. The load sensor 7 is used to detect the friction data and output it to the external equipment. After the initial detection, the pump plug 802 is placed on the placement seat 14 through the work of the transverse drive component 2, and then the rotating plate 902 is controlled to rotate one hundred and twenty degrees again, and the standard part 11 is used for detection again. After the detection, it is rotated one hundred and twenty degrees again. When it returns to the opening 905, it can be disassembled.

[0075] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0076] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0077] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0078] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0080] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0081] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reciprocating piston pump barrel friction and wear test device, comprising a housing (1) and a piston pump (8), wherein the piston pump (8) comprises a pump body (801) and a pump plug (802) slidably mounted in the pump body (801), characterized in that: Also includes: The transmission assembly comprises a transverse drive assembly (2), a longitudinal drive assembly (3), and a sliding seat (4), wherein the transverse drive assembly (2) is arranged in the box body (1) and drives the sliding seat (4) to move transversely, and the longitudinal drive assembly (3) is arranged on the sliding seat (4); A movable plate (5) and a clamping assembly (6), wherein the longitudinal drive assembly (3) drives the movable plate (5) to reciprocate vertically, and the clamping assembly (6) is arranged on the movable plate (5), and the clamping assembly (6) clamps the head of the pump plug (802); The detection assembly comprises a load sensor (7), a detection box (9), a temperature sensor (10), a standard part (11) and a heating rod (12), all of which are arranged in the box body (1), and the load sensor (7) is arranged between the movable plate (5) and the clamping assembly (6); An oil injection assembly (13) is disposed in the box body (1) and is connected to the detection box (9); The detection box (9) comprises an outer cylinder (901) and a second motor (906); a rotating plate (902) is rotatably connected to the outer cylinder (901); a partition plate (903) is provided on the rotating plate (902); the partition plate (903) is a "Y"-shaped structure; the outer cylinder (901) is provided with an opening (905); the second motor (906) is arranged in the box body (1); and the output shaft penetrates into the outer cylinder (901) and is fixed to the rotating plate (902); The three chambers formed by the outer cylinder (901) and the partition plate (903) are each provided with a mounting seat (904), and the mounting seat (904) and the pump body (801) are fastened by bolts (15); The temperature sensor (10) and the heating rod (12) are provided in three groups, which are respectively plugged into the three blades of the partition plate (903); Two groups of placement seats (14) are also provided in the box body (1), and the standard parts (11) and the placement seats (14) are adapted to each other.

2. A reciprocating piston pump barrel friction and wear testing device according to claim 1, characterized in that: The box body (1) comprises an upper working room (101) and a lower working room (102); the upper working room (101) is provided with a front door (103) and side doors (104) located on both sides; The second motor (906) is disposed in the lower working chamber (102), and the outer cylinder (901) is disposed in the upper working chamber (101).

3. A reciprocating plunger pump barrel friction and wear testing device according to claim 2, characterized in that: The transverse drive assembly (2), the longitudinal drive assembly (3), the sliding seat (4), the movable plate (5), the clamping assembly (6), and the load sensor (7) are each provided in two groups and are symmetrically installed in the upper working room (101).

4. A reciprocating piston pump barrel friction and wear testing device according to claim 2, characterized in that: The transverse drive assembly (2) comprises a crossbeam (201) and an electric push rod (202), wherein the crossbeam (201) is fixedly mounted on the top of the inner cavity of the upper working chamber (101); The sliding seat (4) is fixed to the output end of the electric push rod (202), and the sliding seat (4) is slidably mounted on the crossbeam (201).

5. A reciprocating piston pump barrel friction and wear testing device according to claim 1, characterized in that: The longitudinal drive assembly (3) comprises a first motor (301), a ball screw (302) and a guide rod (303); The first motor (301) is arranged in the sliding seat (4), and the output shaft passes through the outside of the sliding seat (4) and is fixed to the ball screw (302); The guide rod (303) is fixedly mounted on the bottom of the sliding seat (4) and is installed parallel to the ball screw (302); The movable plate (5) has a nut pair which is threadedly connected to the ball screw (302), and the movable plate (5) is inserted into the guide rod (303).

6. A reciprocating piston pump barrel friction and wear testing device according to claim 5, characterized in that: The clamping assembly (6) comprises a clamping plate (601), two groups of cylinders (602) and a clamp (603); The load sensor (7) is arranged between the clamping plate (601) and the movable plate (5); The two groups of cylinders (602) are symmetrically mounted on the clamping plate (601), and the clamps (603) have two groups and are respectively fixed to the output ends of the two groups of cylinders (602); The pump plug (802) is arranged between the two sets of clamps (603); The maximum displacement of the clamping plate (601) along the ball screw (302) is greater than the length of the pump plug (802).

7. A reciprocating piston pump barrel friction and wear testing device according to claim 2, characterized in that: The oil injection assembly (13) comprises an oil tank (1301), an oil pump (1302), an oil inlet pipe (1303) and an oil outlet pipe (1304); The oil tank (1301) is disposed in the lower working chamber (102), the oil pump (1302) is disposed in the oil tank (1301), one end of the oil inlet pipe (1303) is connected to the oil pump (1302), and the other end is connected to one of the chambers formed by the outer cylinder (901) and the partition plate (903); One end of the oil outlet pipe (1304) is in communication with the oil tank (1301), and the other end is in communication with another chamber formed by the outer cylinder (901) and the partition plate (903).

8. A reciprocating piston pump barrel friction and wear testing device according to claim 1, characterized in that: The detection box (9) further comprises a universal wheel (907) which is mounted on the rotating plate (902) and contacts the upper surface of the outer cylinder (901).

9. A reciprocating piston pump barrel friction and wear testing device according to claim 1, characterized in that: The arc of the opening (905) formed in the outer cylinder (901) is less than one hundred and twenty degrees.

10. A reciprocating piston pump barrel friction and wear testing device according to claim 1, characterized in that: The outer cylinder (901), the rotating plate (902) and the partition plate (903) are sealed together.

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