Durability test board for pump body

Abstract

The utility model relates to the technical field of hydraulic pump performance detection, in particular to a pump body durability testboard, which comprises a hydraulic station, the hydraulic station comprises a high-temperature oil tank, a cooling oil tank and a power assembly, the high-temperature oil tank is communicated with the top of the side surface of the cooling oil tank assembly, and the power assembly is connected with the bottoms of the high-temperature oil tank and the cooling oil tank; the testing base station comprises a testing motor and a transmission assembly connected with an output shaft of the testing motor, the testing pump comprises a pump shaft, an oil inlet and an oil outlet, the pump shaft is connected with the other end of the transmission assembly, and the oil inlet is connected with the high-temperature oil tank; one end of the loading valve block is connected with the oil outlet, and the other end is connected with the high-temperature oil tank; the transmission assembly comprises a coupler and a bearing seat, the coupler is connected with the test motor, the bearing seat comprises a transmission shaft and a bearing sleeve assembly arranged on the transmission shaft in a sleeving mode, and the bearing sleeve assembly is fixed to the test base station. According to the utility model, the stability of the durability test of the hydraulic pump is improved by improving the connecting structure between the motor and the pump body and the structure of the hydraulic station.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pump performance detection, in particular to a pump body durability test bench. Background Art

[0002] Hydraulic pumps are core components in hydraulic systems, converting mechanical energy into fluid pressure to drive various hydraulic equipment and machinery. With the advancement of industrial automation, hydraulic pumps are increasingly used, and performance requirements are constantly increasing. Durability testing is a key method for evaluating the performance stability and reliability of hydraulic pumps over long-term use. By simulating the load and temperature changes found in real-world operating environments, it can effectively predict the pump's service life, helping manufacturers improve designs and enhance product quality.

[0003] Existing technology mainly relies on traditional test benches in pump body durability testing. The hydraulic pump is driven by a motor to rotate, and the hydraulic oil is pumped into and circulated through a traditional hydraulic station. Usually, the temperature range of the hydraulic oil in the hydraulic station is large, and the temperature needs to be precisely controlled to prevent temperature changes from affecting the accuracy of the test.

[0004] However, the inventors discovered that in actual applications, existing devices suffer from unstable connections between the motor and the pump body, which can reduce power transmission efficiency and, in turn, affect the pump's performance. The hydraulic oil in the hydraulic station is also prone to overheating in high-temperature environments, which not only affects the pump's durability test results but can also damage the pump's actual use. Therefore, a new test structure is urgently needed to effectively address these issues and ensure the stability and accuracy of hydraulic pump durability testing. Utility Model Content

[0005] In view of at least one of the above technical problems, the utility model provides a pump body durability test bench, which improves the stability of the hydraulic pump durability test by improving the connection structure between the motor and the pump body and the hydraulic station structure.

[0006] According to a first aspect of the present invention, a pump body durability test bench is provided, comprising:

[0007] The hydraulic station includes a high-temperature oil tank, a cooling oil tank, and a power assembly. The high-temperature oil tank is connected to the top of the side of the cooling oil tank assembly and contains hydraulic oil. The power assembly is a hydraulic motor. The hydraulic motor is connected to the bottom of the high-temperature oil tank and the cooling oil tank to circulate the hydraulic oil inside.

[0008] At least one test base comprises a test motor, a transmission assembly connected to the output shaft of the test motor, and a test pump, wherein the test pump comprises a pump shaft, an oil inlet and an oil outlet, the pump shaft being connected to the other end of the transmission assembly, and the oil inlet being connected to the high-temperature oil tank;

[0009] A loading valve block, one end of which is connected to the oil outlet and the other end of which is connected to the high-temperature oil tank;

[0010] Among them, the transmission assembly includes a coupling and a bearing seat, the coupling is connected to the test motor, the bearing seat includes a transmission shaft connected between the coupling and the test pump, and a bearing sleeve assembly is sleeved on the transmission shaft, and the bearing sleeve assembly is fixedly set on the test base.

[0011] In some embodiments of the present invention, the hydraulic station also includes a cooling assembly, which includes a heat sink and a filter. One end of the heat sink is connected to the top of the cooling oil tank, and the other end is connected to the filter. The other end of the filter is connected to the bottom of the high-temperature oil tank and the cooling oil tank.

[0012] In some embodiments of the present invention, the hydraulic station also includes a filtering mechanism, including a first filter connected to the bottom of the high-temperature oil tank, a diversion assembly having one end connected to the first filter and the other end connected to the oil outlet, and a second filter having one end connected to the top of the high-temperature oil tank and the other end connected to the loading valve block.

[0013] In some embodiments of the present invention, the diverter assembly includes a diverter block connected to the first filter, the diverter block is provided with a plurality of through holes, each of the through holes is connected to a valve, and the valve is connected to the oil outlet.

[0014] In some embodiments of the present invention, both the high-temperature oil tank and the cooling oil tank have liquid level and temperature gauges therein.

[0015] In some embodiments of the present invention, the bearing sleeve assembly includes two rolling bearings sleeved on the transmission shaft, a bearing retaining ring arranged between the two rolling bearings, end covers respectively arranged at the outer ends of the two rolling bearings, and a bearing housing sleeved outside the bearings and the end covers.

[0016] In some embodiments of the present invention, the bearing housing is fixed on the test base.

[0017] In some embodiments of the present invention, a transition shaft group is provided between the bearing seat and the test pump, and the transition shaft group includes a transition shaft body and a transition shaft sleeve coaxially arranged with the transmission shaft, the transition shaft body is connected to the transmission shaft, the transition shaft sleeve is connected to the pump shaft, the transition shaft body is fixedly connected to the transition shaft sleeve, and a transition outer shell is provided on the outside of the transition shaft body and the transition shaft sleeve.

[0018] In some embodiments of the present invention, a stop cover plate is further provided between the transition shaft body and the transition sleeve, and the stop cover plate is fixedly connected between the transition shaft body and the transition sleeve.

[0019] In some embodiments of the present invention, a mounting flange is further provided between the test pump and the transmission assembly.

[0020] The beneficial effects of the present invention are as follows: the present invention achieves higher test stability and accuracy by optimizing the structural design; through the configuration of the cooling oil tank and the high-temperature oil tank, plus the circulation system of the hydraulic motor, the hydraulic oil temperature is ensured to be precisely controlled, and the high-temperature oil tank is cooled by the cooling oil tank to keep the temperature in the high-temperature oil tank stable, thereby avoiding temperature fluctuations affecting the test results; the design of the coupling and the bearing seat in the transmission assembly effectively improves the power transmission efficiency between the motor and the pump body, reduces energy loss, and ensures test consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic structural diagram of a pump body durability test bench in an embodiment of the present utility model;

[0023] Figure 2 This is a structural diagram of a hydraulic station in a pump durability test bench in an embodiment of the present utility model;

[0024] Figure 3 This is a structural schematic diagram of a test base in a pump body durability test bench in an embodiment of the present utility model;

[0025] Figure 4 This is another structural schematic diagram of a test base in a pump durability test bench in an embodiment of the present utility model;

[0026] Figure 5This is a schematic structural diagram of a transmission assembly in a pump durability test bench according to an embodiment of the present utility model;

[0027] Figure 6 This is a cross-sectional view of a transmission assembly in a pump durability test bench according to an embodiment of the present invention;

[0028] Figure 7 This is a cross-sectional view of another structure of a transmission assembly in a pump durability test bench according to an embodiment of the present utility model;

[0029] Figure 8 This is a structural diagram of the filtering mechanism in the pump durability test bench in an embodiment of the present utility model;

[0030] Figure 9 It is a cross-sectional view of the diversion component in the pump body durability test bench in the embodiment of the present utility model.

[0031] Reference numerals: 1, hydraulic station; 11, high-temperature oil tank; 12, cooling oil tank; 13, power assembly; 14, cooling assembly; 14a, heat sink; 14b, filter; 15, filter mechanism; 15a, first filter; 15b, diverter assembly; 15b1, diverter block; 15b2, through hole; 15b3, valve; 15c, second filter; 2, test base; 21, test motor; 22, transmission assembly; 23, coupling; 24. Bearing seat; 24a. Drive shaft; 24b. Bearing sleeve assembly; 24b1. Rolling bearing; 24b2. Bearing retaining ring; 24b3. End cover; 24b4. Bearing housing; 25. Test pump; 25a. Pump shaft; 25b. Oil inlet; 25c. Oil outlet; 26. Transition shaft assembly; 26a. Transition shaft body; 26b. Transition shaft sleeve; 26c. Transition housing; 26d. Stop cover plate; 27. Mounting flange; 3. Loading valve block. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art in the field of the present invention. The terms used in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0035] like Figures 1 to 9 The pump durability test bench shown includes:

[0036] The hydraulic station 1 includes a high-temperature oil tank 11, a cooling oil tank 12 and a power assembly 13. The high-temperature oil tank 11 is connected to the top of the side of the cooling oil tank 12 assembly, and hydraulic oil is contained inside. The power assembly 13 is a hydraulic motor, and the hydraulic motor is connected to the bottom of the high-temperature oil tank 11 and the cooling oil tank 12 to circulate the hydraulic oil inside. The hydraulic oil in the high-temperature oil tank 11, as the hydraulic oil used in the pump body test, needs to be maintained at a set temperature without too much temperature fluctuation. By circulating the cooling oil tank 12 and the high-temperature oil tank 11, the temperature of the hydraulic oil in the cooling oil tank 12 is used to reduce the temperature in the high-temperature oil tank 11, so that the temperature in the high-temperature oil tank 11 remains stable. It should be pointed out here that the cooling oil tank 12 can be in many forms, and can be an air-cooled oil tank, a water-cooled oil tank, a heat sink cooling oil tank 12, or a combination of air-cooled and water-cooled oil tanks.

[0037] At least one test base 2 includes a test motor 21, a transmission assembly 22 connected to the output shaft of the test motor 21, and a test pump 25. The test pump 25 includes a pump shaft 25a, an oil inlet 25b, and an oil outlet 25c. The pump shaft 25a is connected to the other end of the transmission assembly 22, and the oil inlet 25b is connected to the high-temperature oil tank 11.

[0038] The loading valve block 3 is connected to the oil outlet 25c at one end and to the high-temperature oil tank 11 at the other end; the loading valve block 3 mainly includes structures such as a relief valve, a pressure-increasing valve, a sequence valve, a flow control valve and a one-way valve to simulate load conditions, protect the system and the pump body, adjust the working conditions, and control the temperature; by adjusting the pressure and flow, the loading valve block 3 can realistically simulate the load conditions of the pump body under various working conditions, and help evaluate its performance; the relief valve and pressure reducing valve and other components in the loading valve block 3 can prevent damage to the pump body and the system due to excessive pressure or unstable flow, ensuring the safety and reliability of the test process; the loading valve block 3 also supports working condition adjustment, so that different pressure and flow conditions can be flexibly set during the test to meet the various needs of durability testing; through the bypass valve and cooling interface, the loading valve block 3 can effectively control the temperature of the hydraulic oil to ensure the temperature stability during the test, thereby avoiding the influence of temperature fluctuations on the test results and improving the test accuracy and reliability.

[0039] Among them, the transmission assembly 22 includes a coupling 23 and a bearing seat 24, the coupling 23 is connected to the test motor 21, the bearing seat 24 includes a transmission shaft 24a connected between the coupling 23 and the test pump 25, and a bearing sleeve assembly 24b sleeved on the transmission shaft 24a, and the bearing sleeve assembly 24b is fixedly set on the test base 2.

[0040] In the actual working process of the present invention, the test motor 21 is first turned on to circulate the hydraulic oil between the hydraulic station 1 and the test base 2, and the high-temperature oil tank 11 is used to heat the hydraulic oil so that the hydraulic oil in the high-temperature oil tank 11 reaches the set temperature, so as to ensure that the hydraulic oil temperature in the hydraulic pump is at a set value. The temperature of the hydraulic oil passing through the hydraulic pump will increase. After circulating back to the hydraulic station 1, the cooling oil tank 12 is used to cool the temperature of the hydraulic oil in the cooling oil tank 12. The cooled hydraulic oil is circulated back to the high-temperature oil tank 11, so that the hydraulic oil in the high-temperature oil tank 11 can be kept within the set temperature range. The test motor 21 on the test base 2 rotates, and the test pump 25 is driven to rotate through the coupling 23 and the bearing seat 24 in the transmission mechanism. The setting of the transmission component 22 can make the process of the test motor 21 driving the test pump 25 to rotate more stable, thereby improving the effect and accuracy of the durability test of the test pump 25.

[0041] The present invention achieves higher test stability and accuracy by optimizing the structural design; by configuring the cooling oil tank 12 and the high-temperature oil tank 11, and adding the circulation system of the hydraulic motor, the hydraulic oil temperature is ensured to be accurately controlled, and the cooling oil tank 12 is used to cool the high-temperature oil tank 11 to keep the temperature in the high-temperature oil tank 11 stable, thereby avoiding temperature fluctuations affecting the test results; the design of the coupling 23 and the bearing seat 24 in the transmission assembly 22 effectively improves the power transmission efficiency between the motor and the pump body, reduces energy loss, and ensures test consistency.

[0042] like Figure 2 As shown, in some embodiments of the present invention, the hydraulic station 1 also includes a cooling assembly 14, which includes a heat sink 14a and a filter 14b. One end of the heat sink 14a is connected to the top of the cooling oil tank 12, and the other end is connected to the filter 14b. The other end of the filter 14b is connected to the bottom of the high-temperature oil tank 11 and the cooling oil tank 12. Through the dual functions of heat dissipation and filtering, the performance of the hydraulic station 1 is effectively improved. The heat sink 14a is connected to the cooling oil tank 12, which can effectively reduce the temperature of the circulating hydraulic oil, maintain the stability of the oil temperature in the high-temperature oil tank 11, and avoid high temperature damage to the pump body, which affects the accuracy of the durability test. At the same time, the filter 14b filters impurities in the oil, maintains the cleanliness of the hydraulic oil, prevents contaminants from wearing the system, and ensures the accuracy and stability of the test.

[0043] In some embodiments of the present invention, Figure 1 、 Figure 2 As shown, the hydraulic station 1 also includes a filtering mechanism 15, comprising a first filter 15a connected to the bottom of the high-temperature oil tank 11, a diverter assembly 15b having one end connected to the first filter 15a and the other end connected to the oil outlet 25c, and a second filter 15c having one end connected to the top of the high-temperature oil tank 11 and the other end connected to the loading valve block 3. The combination of the first filter 15a and the second filter 15c effectively improves the cleanliness of the hydraulic oil. The first filter 15a is connected to the bottom of the high-temperature oil tank 11 and filters the hydraulic oil output from the tank, ensuring that the oil entering the diverter assembly 15b is free of impurities, reducing wear on the system and the pump body. The second filter 15c, located between the top of the high-temperature oil tank 11 and the loading valve block 3, further filters the oil to prevent impurities from entering the test circuit during the loading process, thereby ensuring the cleanliness of the hydraulic oil in each test step.

[0044] like Figure 2 、 Figure 8 、 Figure 9 As shown, in some embodiments of the present invention, the diverter assembly 15b includes a diverter block 15b1 connected to the first filter 15a. The diverter block 15b1 is provided with multiple through-holes 15b2, each of which is connected to a valve 15b3, which is connected to the oil outlet 25c. The diverter assembly 15b enables flexible control of the hydraulic oil flow, allowing the test bench to adjust the flow rate according to different testing requirements, thereby simulating various operating conditions and improving test accuracy. The valves 15b3 at each through-hole 15b2 can also be independently adjusted to achieve pressure settings for different channels, providing a diverse pressure testing environment for the pump body.

[0045] In some embodiments of the present invention, both the high-temperature oil tank 11 and the cooling oil tank 12 are equipped with level and temperature gauges. Real-time monitoring of the hydraulic oil level and temperature ensures optimal system operation, helping to promptly detect and correct hydraulic oil shortages or abnormal temperatures, thereby preventing them from impacting pump test results.

[0046] like Figures 5 to 7As shown, in some embodiments of the present invention, the bearing sleeve assembly 24b includes two rolling bearings 24b1 mounted on the transmission shaft 24a, a bearing retaining ring 24b2 disposed between the two rolling bearings 24b1, end caps 24b3 disposed at the outer ends of the two rolling bearings 24b1, and a bearing housing 24b4 mounted outside the bearings and the end caps 24b3. By disposing two rolling bearings 24b1 on the transmission shaft 24a and disposing the bearing retaining ring 24b2 therebetween, the axial movement of the bearings can be effectively limited, ensuring the stable operation of the transmission shaft 24a. The end caps 24b3 at the outer ends and the external bearing housing 24b4 jointly provide protection for the rolling bearings 24b1, preventing the ingress of foreign matter and contaminants, thereby extending the service life of the bearings, reducing friction and wear during the transmission process, and improving power transmission efficiency and the overall reliability of the system.

[0047] In some embodiments of the present invention, Figure 3 、 Figure 4 As shown, the bearing housing 24b4 is fixed to the test base 2. This fixing method provides a solid support, ensuring that the bearing sleeve assembly 24b remains stable during operation, reducing the impact of vibration and displacement on test results, thereby improving the accuracy and reliability of the test. The fixed bearing housing 24b4 helps maintain the coaxiality of the transmission shaft 24a, reducing the wear and failure risks caused by deviation of the bearing or transmission shaft 24a.

[0048] like Figures 5 to 7 As shown, a transition shaft assembly 26 is also provided between the bearing seat 24 and the test pump 25. The transition shaft assembly 26 includes a transition shaft body 26a and a transition shaft sleeve 26b, which are arranged coaxially with the transmission shaft 24a. The transition shaft body 26a is connected to the transmission shaft 24a, and the transition shaft sleeve 26b is connected to the pump shaft 25a. The transition shaft body 26a and the transition shaft sleeve 26b are fixedly connected. A transition housing 26c is also provided on the outside of the transition shaft body 26a and the transition shaft sleeve 26b. By adopting the coaxial design of the transition shaft body 26a and the transition shaft sleeve 26b, a smooth transition and precise docking between the transmission shaft 24a and the pump shaft 25a are achieved, ensuring the efficiency and stability of power transmission. The transition shaft body 26a is connected to the transmission shaft 24a, and the transition shaft sleeve 26b is connected to the pump shaft 25a. The fixed connection further reduces the risk of loosening and wear at the connection. The external transition housing 26c provides additional protection to prevent the external environment from affecting the transition shaft assembly 26, thereby extending its service life.

[0049] like Figure 7As shown, a stopper cover plate 26d is further provided between transition shaft body 26a and transition sleeve 26b. Stopper cover plate 26d is fixedly connected between transition shaft body 26a and transition sleeve 26b. Stopper cover plate 26d effectively limits relative axial movement between transition shaft body 26a and transition sleeve 26b, ensuring a stable connection between the two during operation. This helps reduce wear and vibration caused by axial displacement, thereby improving the stability and durability of the entire transmission system.

[0050] like Figure 3 、 Figure 4 As shown, a mounting flange 27 is further provided between the test pump 25 and the transmission assembly 22. The mounting flange 27 provides a stable and precise connection interface, ensuring the coaxiality and alignment between the test pump 25 and the transmission assembly 22, thereby improving the efficiency and accuracy of power transmission.

[0051] Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and the specification are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A pump body durability test bench, characterized in that: include: The hydraulic station includes a high-temperature oil tank, a cooling oil tank, and a power assembly. The high-temperature oil tank is connected to the top of the side of the cooling oil tank assembly and contains hydraulic oil. The power assembly is a hydraulic motor. The hydraulic motor is connected to the bottom of the high-temperature oil tank and the cooling oil tank to circulate the hydraulic oil inside. At least one test base comprises a test motor, a transmission assembly connected to the output shaft of the test motor, and a test pump, wherein the test pump comprises a pump shaft, an oil inlet and an oil outlet, the pump shaft being connected to the other end of the transmission assembly, and the oil inlet being connected to the high-temperature oil tank; A loading valve block, one end of which is connected to the oil outlet and the other end of which is connected to the high-temperature oil tank; Among them, the transmission assembly includes a coupling and a bearing seat, the coupling is connected to the test motor, the bearing seat includes a transmission shaft connected between the coupling and the test pump, and a bearing sleeve assembly is sleeved on the transmission shaft, and the bearing sleeve assembly is fixedly set on the test base.

2. The pump body durability test bench according to claim 1, characterized in that: The hydraulic station also includes a cooling assembly, which includes a heat sink and a filter. One end of the heat sink is connected to the top of the cooling oil tank, and the other end is connected to the filter. The other end of the filter is connected to the bottom of the high-temperature oil tank and the cooling oil tank.

3. The pump body durability test bench according to claim 1, characterized in that: The hydraulic station also includes a filtering mechanism, including a first filter connected to the bottom of the high-temperature oil tank, a diversion component having one end connected to the first filter and the other end connected to the oil outlet, and a second filter having one end connected to the top of the high-temperature oil tank and the other end connected to the loading valve block.

4. The pump body durability test bench according to claim 3, characterized in that: The diverter assembly includes a diverter block connected to the first filter. The diverter block is provided with a plurality of through holes. Each of the through holes is connected to a valve, and the valve is connected to the oil outlet.

5. The pump body durability test bench according to claim 1, characterized in that: The high-temperature oil tank and the cooling oil tank are both provided with liquid level and temperature gauges.

6. The pump body durability test bench according to claim 1, characterized in that: The bearing sleeve assembly includes two rolling bearings sleeved on the transmission shaft, a bearing retaining ring arranged between the two rolling bearings, end covers respectively arranged at the outer ends of the two rolling bearings, and a bearing housing sleeved outside the bearings and the end covers.

7. The pump body durability test bench according to claim 6, characterized in that: The bearing housing is fixed on the test base.

8. The pump body durability test bench according to claim 1, characterized in that: There is also a transition shaft group between the bearing seat and the test pump. The transition shaft group includes a transition shaft body and a transition shaft sleeve which are arranged coaxially with the transmission shaft. The transition shaft body is connected to the transmission shaft, and the transition shaft sleeve is connected to the pump shaft. The transition shaft body and the transition shaft sleeve are fixedly connected, and a transition outer shell is also provided on the outside of the transition shaft body and the transition shaft sleeve.

9. The pump body durability test bench according to claim 8, characterized in that: A stop cover plate is further provided between the transition shaft body and the transition sleeve, and the stop cover plate is fixedly connected between the transition shaft body and the transition sleeve.

10. The pump body durability test bench according to claim 1, characterized in that: A mounting flange is provided between the test pump and the transmission assembly.

Images