Hydraulic pump pressure flow test equipment

Abstract

The utility model relates to the technical field of hydraulic pump pressure and flow test, and particularly discloses hydraulic pump pressure and flow test equipment, which comprises a test equipment main body, a motor arranged on the test equipment main body, a hydraulic pump arranged at the output end of the motor, and a test detection mechanism arranged on the test equipment main body. The test detection mechanism is used for carrying out multi-gear flow test detection on the hydraulic pump, all parts of the test detection mechanism are communicated through pipelines, an anti-loose self-pre-tightening mechanism is arranged at a pipeline interface, and the test detection mechanism is combined with a flow meter and a pressure sensor to collect original parameters in real time and transmit the original parameters to the integrated control panel; multi-level flow accurate coverage from small flow to rated flow and instantaneous flow sudden change is achieved, the testing precision and the accuracy of hydraulic pump performance evaluation are greatly improved, connector leakage caused by long-time high-pressure vibration is effectively avoided by arranging the anti-loosening self-pre-tightening mechanism, and the service life of equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic pump pressure flow test, concretely to a hydraulic pump pressure flow test equipment. BACKGROUND

[0002] The hydraulic pump is the core power element for converting the mechanical energy output by the power source into hydraulic energy, and its performance directly determines the operation efficiency and reliability of terminal products such as engineering machinery and industrial hydraulic equipment, so the key performance must be detected by professional equipment before leaving the factory, and the hydraulic pump pressure flow test equipment is a testing device specially used for verifying the performance of the hydraulic pump, and the core function is to simulate the actual working condition of the hydraulic pump, collect and analyze the key parameters such as the output pressure, flow and leakage of the pump through the power driving, testing loop, sensing measurement and control processing system, and judge whether the product meets the design standard.

[0003] The existing test equipment is designed for specific pressure and displacement of the hydraulic pump, has narrow compatibility range, and has insufficient flexibility in flow regulation, is mostly in fixed flow test mode, cannot accurately simulate the flow gradient change under different working conditions, is difficult to comprehensively verify the flow adaptation capability of the hydraulic pump, and the sealing structure at the pipeline interface under long-time high-pressure working condition is prone to bolt loosening due to vibration, thereby causing sealing failure and liquid leakage, and affecting the test efficiency and data. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of hydraulic pump pressure flow test equipment to solve the problems that the existing test equipment is designed for specific pressure and displacement of the hydraulic pump, has narrow compatibility range, and has insufficient flexibility in flow regulation, is mostly in fixed flow test mode, cannot accurately simulate the flow gradient change under different working conditions, is difficult to comprehensively verify the flow adaptation capability of the hydraulic pump, and the sealing structure at the pipeline interface under long-time high-pressure working condition is prone to bolt loosening due to vibration, thereby causing sealing failure and liquid leakage, and affecting the test efficiency and data.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of hydraulic pump pressure flow test equipment, including test equipment main body, motor is equipped on test equipment main body, and the motor output end is equipped with hydraulic pump, and test detection mechanism is equipped on test equipment main body, and test detection mechanism carries out multi-grade flow test detection to hydraulic pump, and each component of test detection mechanism is communicated by pipeline, and anti-loosening self-preloading mechanism is equipped at pipeline interface.

[0006] Among them, test detection mechanism includes oil tank, and oil tank is communicated by pipeline with hydraulic pump, and accumulator is equipped on the main pipeline of the oil outlet end of hydraulic pump, and pressure flow test valve group is equipped at the outlet of accumulator, and cooler is fixedly connected downstream of pressure flow test valve group, and cooler downstream is connected with oil tank.

[0007] Wherein, the anti-loose self-preloading mechanism includes a first flange fixedly connected with the pipeline, a stepped hole is formed in the first flange, a spring is arranged in the stepped hole, a sealing gasket is fixedly connected to the side of the first flange away from the pipeline, a second flange is arranged on the side of the sealing gasket away from the first flange, a nut is fixedly connected to the second flange at a position corresponding to the stepped hole of the first flange, and a bolt is arranged in the stepped hole and threadedly connected with the nut.

[0008] Wherein, the pressure flow test valve group is provided with two groups, and each group of pressure flow test valve group is composed of four groups of flow valves in parallel.

[0009] Wherein, the test equipment main body is fixedly connected with a control panel, and the control panel is provided with a pressure gauge and a flow meter.

[0010] Wherein, an electric valve is arranged outside the pressure flow test valve group, and the electric valve is connected with the control panel.

[0011] Wherein, a flow meter is arranged on the pipeline, and the flow meter is connected with the flow meter of the control panel.

[0012] Wherein, a pressure sensor is arranged on the pipeline, and the pressure sensor is connected with the pressure gauge of the control panel.

[0013] Wherein, the pressure flow test valve group composed of four groups of flow valves in parallel, wherein three groups of flow valves are fixed position flow valves, and the other group is a proportional adjusting flow valve.

[0014] Wherein, the bolt head abuts against the spring after the bolt is fastened with the nut.

[0015] The utility model at least has the following beneficial effects:

[0016] In use, the test detection mechanism is combined with the flow meter and the pressure sensor to collect original parameters in real time and transmit them to the integrated control panel, so that multi-grade flow precision coverage is realized from small flow to rated flow and instantaneous flow mutation, the test precision and the accuracy of hydraulic pump performance evaluation are greatly improved, the anti-loose self-preloading mechanism is arranged to effectively avoid interface leakage caused by long-time high-pressure vibration, the service life of the equipment is significantly prolonged, and the core needs of the hydraulic pump multi-working-condition pressure flow test are fully met. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the utility model;

[0018] Figure 2 It is a whole structure top view schematic view of the utility model;

[0019] Figure 3 It is an anti-loose self-preloading mechanism schematic view of the utility model;

[0020] Figure 4 It is the inside schematic diagram of the stepped hole of the utility model;

[0021] Figure 5 It is the oblique view schematic diagram of the anti-loose self-preloading mechanism of the utility model.

[0022] In the figure: 1, test equipment main body; 2, motor; 3, hydraulic pump; 4, test detection mechanism; 41, oil tank; 42, energy accumulator; 43, pressure flow test valve group; 44, cooler; 5, anti-loose self-preloading mechanism; 51, first flange; 52, stepped hole; 53, spring; 54, sealing gasket; 55, second flange; 56, nut; 57, bolt; 6, pipeline; 7, control panel; 8, pressure gauge; 9, flow meter; 10, electric valve; 11, flow meter; 12, pressure sensor. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] Please refer to Figures 1 to 5 The utility model provides a kind of technical scheme: a kind of hydraulic pump pressure flow test equipment, it includes: test equipment main body 1, test equipment main body 1 is equipped with motor 2, motor 2 output end is equipped with hydraulic pump 3, test equipment main body 1 is equipped with test detection mechanism 4, test detection mechanism 4 carries out multiple flow test detection to hydraulic pump 3, test detection mechanism 4 each component is connected by pipeline 6, and pipeline 6 interface is equipped with anti-loose self-preloading mechanism 5.Test equipment main body 1 is fixedly installed with motor 2 by shock-absorbing base, motor 2 output end is coaxially connected with hydraulic pump 3 by elastic coupling, test detection mechanism 4 can realize multiple flow test detection from small flow to rated flow, instantaneous flow mutation, can comprehensively verify the flow adaptation ability and dynamic response performance of hydraulic pump 3, test detection mechanism 4 each component is connected by high-pressure shock-resistant pipeline 6, and pipeline 6 interface is equipped with anti-loose self-preloading mechanism 5, can effectively avoid the interface loosening leakage caused by vibration under high pressure working condition, guarantee the sealing and stability of testing process.

[0025] The test detection mechanism 4 comprises an oil tank 41, the oil tank 41 is communicated with the hydraulic pump 3 through the pipeline 6, the main pipeline 6 of the oil outlet of the hydraulic pump 3 is provided with an accumulator 42, the outlet of the accumulator 42 is provided with a pressure flow test valve group 43, the downstream of the pressure flow test valve group 43 is fixedly connected with a cooler 44, and the downstream of the cooler 44 is connected with the oil tank 41. The oil tank 41 is communicated with the oil inlet of the hydraulic pump 3 through the pipeline 6, and an oil suction filter is arranged in series on the oil suction pipeline 6, so that impurities in the oil can be filtered, the wear of internal parts of the hydraulic pump 3 is prevented, a plurality of accumulators 42 are arranged in parallel on the main pipeline 6 of the oil outlet of the hydraulic pump 3, the accumulators 42 are used for absorbing the periodic pulsation of the output oil of the hydraulic pump 3 and buffering the pressure impact during working condition switching, the stability of subsequent detection parameters is ensured, the temperature of the oil after testing can be controlled within 45 DEG C by the cooler 44, the influence of high oil temperature on the viscosity of the oil and the testing precision is avoided, the cooler 44 is communicated with the oil tank 41 through a return oil pipeline 6, a return oil filter is arranged in series on the return oil pipeline 6, impurities and wear particles generated during the testing process can be filtered, the cleanliness of the oil is ensured, a closed-loop oil circuit is formed, and the service life of the equipment is prolonged. In use, the oil suction pipeline 6 is communicated with the hydraulic pump 3, impurities can be filtered to protect the pump body, the oil at the oil outlet of the hydraulic pump 3 enters the pressure flow test valve group 43, and the pressure flow test valve group 43 is cooperated with the electric valve 10 to realize cooperative control, the coverage range of flow testing is greatly improved, and then the oil is cooled by the cooler 44 and reenters the oil tank 41 to form a closed-loop circuit.

[0026] The anti-loose self-preloading mechanism 5 comprises a first flange 51 fixedly connected with the pipeline 6, a stepped hole 52 is formed in the first flange 51, a spring 53 is arranged in the stepped hole 52, a sealing gasket 54 is fixedly connected to the side, away from the pipeline 6, of the first flange 51, a second flange 55 is arranged on the side, away from the first flange 51, of the sealing gasket 54, a nut 56 is fixedly connected to the second flange 55 at a position corresponding to the stepped hole 52 of the first flange 51, a bolt 57 is arranged in the stepped hole 52 in a penetrating mode, the bolt 57 is threadedly connected with the nut 56, and the bolt head is in abutment with the spring 53 after the bolt 57 is fastened with the nut 56. The stepped hole 52 is four and is uniformly distributed along the circumference of the first flange 51, the sealing gasket 54 is a composite sealing gasket 54 and is fixedly connected with the first flange 51 in a bonding mode, the sealing gasket 54 has a double-layer structure of inner-layer carbon fiber reinforced PTFE and outer-layer fluorine rubber, is resistant to high pressure, oil and wear, the bolt 57 is a high-strength alloy fastening bolt, the bolt head is in abutment with the spring 53 and makes the spring 53 generate pre-compression deformation after the bolt 57 is fastened with the nut 56, the clearance caused by high-pressure vibration and thermal expansion and cold contraction is compensated by the continuous elastic pre-tightening force of the spring 53, the long-term anti-loose and anti-leak effects are realized, the sealing reliability is improved, and the sealing gasket 54 is convenient to disassemble and assemble, so that the maintenance time can be reduced. In use, the spring 53 is loaded into the stepped hole 52 of the first flange 51, the first flange 51 and the second flange 55 are aligned, the bolt 57 is penetrated and tightened, the bolt head extrudes the spring 53 to generate pre-compression deformation, the two flanges are pushed to adhere to and compact the double-layer composite sealing gasket 54 to form initial sealing.

[0027] During the operation of the device, the slight gap at the interface caused by high-pressure vibration and thermal expansion and contraction can be automatically compensated by the continuous elastic pre-tightening force released by the pre-compression spring 53, so that the compacted state of the sealing gasket 54 is always maintained, the leakage passage is blocked by the high-pressure-resistant composite sealing gasket 54, and the long-term stable anti-loose and anti-leakage effect is achieved.

[0028] The pressure flow test valve group 43 is provided with two groups, and the pressure flow test valve group 43 is composed of four groups of flow valves in parallel, of which three groups of flow valves are fixed gear flow valves, and the other group is a proportional adjusting flow valve.

[0029] The two groups of valve groups can adapt to the test requirements of different specifications of the hydraulic pump 3. The pressure flow test valve group 43 is composed of four groups of flow valves in parallel, of which three groups of flow valves are 10±0.2L / min, 20±0.4L / min and 30±1L / min fixed gear flow valves, which can be quickly switched to realize conventional flow working condition test, and the other group is a continuously adjustable proportional adjusting flow valve, which can accurately simulate complex working conditions such as instantaneous flow mutation and flow gradient change. The two groups of valve groups and the four types of flow valves cooperate to improve the coverage range of the flow test of the device, greatly reduce the test precision error, and can fully verify the output performance of the hydraulic pump 3 under different flow conditions.

[0030] The test equipment main body 1 is fixedly connected with a control panel 7, and the control panel 7 is provided with a pressure gauge 8 and a flowmeter 9. The panel is integrated with a device start-stop button, a flow or pressure parameter adjusting button, a working condition switching key and a touch display screen, which can display test data, working condition state and fault alarm information in real time, significantly improve the operation convenience, reduce manual operation errors and improve test efficiency.

[0031] The pressure flow test valve group 43 is provided with an electric valve 10, and the electric valve 10 is connected with the control panel 7. The electric valve 10 and the control panel 7 are connected, which can receive the instructions of the control panel 7 and control the pressure flow test valve group 43 to complete the coordinated control of multiple flow rates, accurately match the flow gradient switching rhythm, avoid the distortion of test data caused by flow fluctuation, and improve the stability of dynamic condition simulation.

[0032] The pipeline 6 is provided with a flowmeter 11 and a pressure sensor 12, and the flowmeter 11 and the pressure sensor 12 are respectively connected with the flowmeter 9 and the pressure gauge 8 of the control panel 7. This design can collect the original flow and pressure parameters of the output oil of the hydraulic pump 3 in real time, capture the instantaneous flow mutation and pressure fluctuation signals, and display the data synchronously after processing by the control panel 7, which provides accurate data support for test result analysis and improves the accuracy of performance evaluation of the hydraulic pump 3.

[0033] In the whole use, when the equipment is powered on, the motor 2 drives the hydraulic pump 3 to start, the oil in the oil tank 41 is filtered through the oil suction filter and then enters the hydraulic pump 3, the pump output oil is delivered through the main pipeline 6, the oil collects parameters through the pressure and temperature sensor, then changes the single and double pump mode according to the demand, enters the corresponding loading module, realizes the accurate control of multi-grade flow through the pressure flow test valve group 43, and transmits the real-time data to the control panel 7, the tested oil is cooled through the cooler 44, filtered through the oil return filter, and then returns to the oil tank 41 to form a cycle, the anti-loosening self-preloading mechanism 5 of the pipeline 6 interface avoids high pressure leakage through continuous pre-tightening force, and the whole process realizes the accurate detection of the multi-grade flow, dynamic response and pressure resistance performance of the hydraulic pump 3, and reduces the test precision error.

[0034] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0035] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic pump pressure-flow test apparatus comprising: The main body of the test equipment is characterized in that: a motor is provided on the main body of the test equipment, a hydraulic pump is provided at the output end of the motor, a test and detection mechanism is provided on the main body of the test equipment, the test and detection mechanism performs multi-level flow rate tests on the hydraulic pump, the components of the test and detection mechanism are connected by pipes, and an anti-loosening self-pre-tightening mechanism is provided at the pipe interface.

2. The hydraulic pump pressure-flow test apparatus of claim 1, wherein: The testing and inspection mechanism includes an oil tank, which is connected to a hydraulic pump via a pipeline. An accumulator is installed on the main pipeline at the oil outlet of the hydraulic pump. A pressure and flow test valve group is installed at the outlet of the accumulator. A cooler is fixedly connected downstream of the pressure and flow test valve group, and the cooler is connected downstream to the oil tank.

3. The hydraulic pump pressure-flow test apparatus of claim 1, wherein: The anti-loosening self-pre-tightening mechanism includes a first flange fixedly connected to the pipeline. The first flange has a stepped hole, and a spring is installed in the stepped hole. A sealing gasket is fixedly connected to the side of the first flange away from the pipeline. A second flange is provided on the side of the sealing gasket away from the first flange. A nut is fixedly connected to the second flange at the position corresponding to the stepped hole of the first flange. A bolt passes through the stepped hole, and the bolt is threadedly connected to the nut.

4. The hydraulic pump pressure-flow test apparatus of claim 2, wherein: The pressure and flow test valve group is provided in two groups, and each group of the pressure and flow test valve group consists of four groups of flow valves connected in parallel.

5. The hydraulic pump pressure-flow test apparatus of claim 2, wherein: A control panel is fixedly connected to the main body of the test equipment, and the control panel is equipped with a pressure gauge and a flow meter.

6. The hydraulic pump pressure-flow test apparatus of claim 2, wherein: An electric valve is provided on the outside of the pressure and flow test valve assembly, and the electric valve is connected to the control panel.

7. The hydraulic pump pressure-flow test apparatus of claim 5, wherein: A flow meter is installed on the pipeline, and the flow meter is connected to the flow meter on the control panel.

8. The hydraulic pump pressure-flow test apparatus of claim 7, wherein: A pressure sensor is installed on the pipeline, and the pressure sensor is connected to the pressure gauge on the control panel.

9. The hydraulic pump pressure flow test apparatus of claim 4, wherein: In the pressure and flow test valve group consisting of four sets of flow valves connected in parallel, three sets of flow valves are fixed-position flow valves, and the other set is a proportional regulating flow valve.

10. The hydraulic pump pressure flow test apparatus of claim 3, wherein: After the bolt is tightened with the nut, the bolt head abuts against the spring.

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