Device for testing service life of corrugated pipe assembly of oil pump regulator

Abstract

The invention provides a service life test device for a corrugated pipe assembly of an oil pump regulator, which is characterized in that a gas tank is connected with a gas inlet port of a gas source pressure conversion device, and a gas outlet port of the gas source pressure conversion device is connected with one end of a constant gas pressure joint and a pressure inlet of a circulating switch controller; a pressure outlet of the circulating switch controller is connected with one end of the circulating alternating air pressure joint, and the other end of the constant air pressure joint is connected with one end of the shell; the other end of the circulating alternating air pressure joint is connected with the other end of the shell; the limiting block is fixed in the shell and located between the constant air pressure connector and the corrugated pipe assembly, a through hole is formed in the limiting block, and the measuring block is installed in the middle of the corrugated pipe assembly and can axially move along with a product. The displacement sensor is fixedly installed on the outer side of the shell and aligned with the middle position of the measuring block. Two different pressures can be provided at the same time, pressure circulation is achieved, product installation and actual working conditions are simulated, and the performance of the corrugated pipe assembly of the oil pump regulator is detected.

Description

Technical Field

[0001] This invention belongs to the field of experimental tooling design technology, and in particular relates to a life testing device for bellows components of oil pump regulators. Background Technology

[0002] The oil pump regulator bellows assembly senses the pressure changes after the compressor through the bellows, generates a corresponding axial displacement, controls the position of the starter accelerator valve, and realizes the function of regulating the fuel supply.

[0003] The bellows assembly of the oil pump regulator senses oil pressure externally and air pressure internally. Its main working principle is that the bellows senses pressure changes. Ordinary or general-purpose tooling equipment cannot simultaneously provide two different pressures of different magnitudes and forms, maintaining one pressure constant while the other circulates. Summary of the Invention

[0004] To address the problem in existing technologies where tooling equipment cannot simultaneously provide two pressures of different magnitudes and forms, this invention provides a life testing device for oil pump regulator bellows assemblies. This device can simultaneously provide two different pressures and achieve pressure cycling, simulating product installation and actual operating conditions. Under specified conditions, it completes life testing, detects the performance of the oil pump regulator bellows assembly, and evaluates product reliability and durability. The technical solution is as follows: A life testing device for bellows assemblies of oil pump regulators is provided, comprising: an air tank 1, an air source pressure conversion device 2, a circulation switch controller 3, a constant air pressure connector 4, a circulating alternating air pressure connector 5, a limit block 6, a housing 7, a measuring block 10, and a displacement sensor 11. Gas tank 1 is connected to the inlet port of gas source pressure conversion device 2. The outlet port of gas source pressure conversion device 2 is connected to one end of constant pressure connector 4 and the pressure inlet of circulation switch controller 3. The pressure outlet of circulation switch controller 3 is connected to one end of circulation alternating pressure connector 5. The other end of the constant pressure connector 4 is connected to one end of the housing 7; the other end of the circulating alternating pressure connector 5 is connected to the other end of the housing 7; the bellows assembly is located inside the housing 7; The limiting block 6 is fixed inside the housing 7 and located between the constant pressure connector 4 and the bellows assembly. It is pressed tightly and serves to limit and fix the bellows assembly. The limiting block 6 is provided with a through hole on the outer surface of the bellows assembly to allow constant pressure to pass through it. The measuring block 10 is installed in the middle of the bellows assembly and can move axially with the product, with the horizontal displacement being equal to the vertical displacement. The displacement sensor 11 is fixedly installed on the outside of the housing 7 and aligned with the middle position of the measuring block 10.

[0005] The measuring block 10 is a triangular trapezoidal boss structure with an angle of 45 degrees, and is made of metal.

[0006] Furthermore, an O-ring 8 is provided between the housing 7 and the bellows assembly to isolate and seal the bellows assembly from the constant external pressure and the internal cyclic alternating pressure.

[0007] Optionally, the limiting block 6 has a cylindrical boss with an outer thread structure, and a hexagonal boss is also provided above the cylindrical boss to facilitate installation with tools; a multi-step groove is provided below the limiting block 6 to facilitate fitting and assembly with the shape of the bellows assembly. Furthermore, the cylindrical boss is also provided with multiple equally spaced circular holes that connect the constant pressure connector end and the external pressure of the bellows assembly.

[0008] Optionally, the constant pressure connector 4 is connected to the air source pressure conversion device 2, and the circulating alternating pressure connector 5 is connected to the circulating switch controller 3 via a pressure hose. The constant pressure connector 4 and the circulating alternating pressure connector 5 are double-threaded adapters, which are easy to interchange and connect. The double-threaded connector has a hexagonal structure in the middle, which is easy to install with tools. The double-threaded connector has a through hole inside, which allows the pressure in the pressure hose to be transmitted into the housing 7 and the bellows assembly 9.

[0009] Optionally, the housing 7 is a transparent cube with internal threaded grooves at both ends, a through hole inside, and a sensor mounting position mark in the middle of the outer side.

[0010] Optionally, the housing 7 is made of plexiglass, which facilitates observation of the internal conditions and detection characteristics.

[0011] Optionally, the cycle switch controller 3 consists of a power switch, a circulator, a counter, a solenoid valve, a flow control valve, a pressure gauge, a first three-way valve, and a second three-way valve. The circulator is connected to the solenoid valve and the flow control valve. The solenoid valve is also connected to the air source pressure conversion device 2 and the first three-way valve. The first three-way valve is connected to the pressure gauge and the second three-way valve. The second three-way valve is connected to the flow control valve and the cycle alternating air pressure connector 5.

[0012] The beneficial effects of this invention are at least as follows: A life testing device for an oil pump regulator bellows assembly is provided. It offers two pressure settings of different sizes and types, maintaining one pressure constant while cyclically applying the other. The device can also set and record the number of cycles and time, simulating actual product operating conditions. Under specified conditions, it completes life testing, detects and records the displacement performance of the oil pump regulator bellows assembly, and evaluates the product's reliability and durability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the device used for testing the lifespan of bellows assemblies in oil pump regulators. Figure 2 This is a schematic diagram of the internal pressure of the shell; Figure 3 This is a schematic diagram of the working principle of a displacement sensor; Figure 4 This is a side view of the limiting block; Figure 5 This is a schematic diagram of the multi-step groove of the limiting block; Figure 6 This is a block diagram of the cyclic switch controller. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0016] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited from each other.

[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0018] See Figure 1 The present invention provides a life test device for bellows assembly of oil pump regulator, comprising: air tank 1, air source pressure conversion device 2, circulation switch controller 3, constant air pressure connector 4, circulating alternating air pressure connector 5, limit block 6, housing 7, O-ring 8, pressure hose, measuring block 10, and displacement sensor 11.

[0019] Gas tank 1 is a gas source pressure storage device that provides pressure for the entire system. The gas source pressure is introduced into the gas source pressure conversion device 2 through a pressure hose for pressure reduction and diversion.

[0020] Furthermore, gas cylinder 1 can also be pressurized via a pressure hose. Gas cylinder 1 has a three-way or four-way valve on its connector, one end connecting to the inside of the gas cylinder and the other end being an outlet connected to pressure conversion device 2. Two additional connectors are also provided for pressurization. Each valve has an on / off switch to ensure safe operation.

[0021] The gas source pressure conversion device 2 consists of a pressure reducer, a pressure gauge, and a pressure switch. The device adjusts the gas source pressure to multiple settable pressure outlets via the pressure reducer and pressure switch. The pressure reducer and pressure switch adjust the gas source pressure to 0.25 MPa and 1.5 MPa respectively. The 0.25 MPa gas source pressure is input to the constant pressure connector 4, and the 1.5 MPa gas source pressure is input to the circulation switch controller 3. The specific structure of the gas source pressure conversion device 2 can be found in relevant technologies and will not be described further here.

[0022] Each pressure switch in the air source pressure conversion device 2 corresponds to a pressure gauge, which can accurately adjust and maintain the outlet pressure. All interfaces are standard pipe threads, and the outlet is connected to the pressure hose via threads. Teflon tape is wrapped around the connection to enhance the seal and prevent leakage.

[0023] See Figure 6 The circulation switch controller 3 consists of a power switch, a circulator, a counter, a solenoid valve, a flow control valve, a pressure gauge, a first three-way valve, and a second three-way valve. The circulator is connected to the solenoid valve and the flow control valve. The solenoid valve is also connected to the air source pressure conversion device 2 and the first three-way valve. The first three-way valve is connected to the pressure gauge and the second three-way valve. The second three-way valve is connected to the flow control valve and the circulating alternating air pressure connector 5. The gas is depressurized by the pressure reducer inside the gas source pressure conversion device 2 and then fed into the circulation switch controller 3.

[0024] The circulator controls the opening and closing of the solenoid valve and flow control valve. When the solenoid valve is closed, it is equivalent to an open circuit, and no pressure enters the bellows assembly. When the solenoid valve is open, pressure enters and flows through the solenoid valve, the three-way pipe, and the circulating alternating air pressure connector 5 into the bellows assembly 9. At this time, the flow control valve is closed. When the solenoid valve closes again, the flow control valve opens, and the gas is discharged from the system to the atmosphere.

[0025] A counter records the number of cycles, and a pressure gauge measures whether the pressure inside the pipeline meets the test requirements. The pressure inlet is connected to one end of the air source pressure conversion device 2 via a pressure hose, and the pressure outlet is connected to the circulating alternating air pressure connector 5 via a pressure hose. By setting the circulator time and number of cycles, the opening and closing time and number of opening and closing of the solenoid valve are controlled to achieve pressure circulation at the outlet end, which meets the stress requirements of the product in the product life test.

[0026] For example, the cycle count is set to 10,000, the solenoid valve opening time is 8 seconds, and the closing time is 4 seconds.

[0027] One end of the constant pressure connector 4 is threaded to the housing 7, and the other end is threaded to the constant pressure outlet of the air source pressure conversion device 1. One end of the circulating alternating pressure connector 5 is threaded to the other end of the housing 7, and the other end of the circulating alternating pressure connector 5 is threaded to the circulating pressure outlet of the circulating switch controller 3.

[0028] The fine-threaded end M32×1.5 of the constant pressure connector 4 is connected to the housing 7, and the other end, with a pipe thread G1 / 4, is connected to the constant pressure outlet of the air source pressure conversion device 1 via a pressure hose. The fine-threaded end M32×2 of the circulating alternating pressure connector 5 is connected to the other end of the housing 7, and the other end, with a pipe thread G1 / 4, is connected to the pressure outlet of the circulating switch controller 3 via a pressure hose.

[0029] Constant pressure connector 4 and circulating alternating pressure connector 5 are double-threaded adapters. The connection ends of constant pressure connector 4 and circulating alternating pressure connector 5 to the pressure hose are standard threads, facilitating interchangeability and connection. The double-threaded connector has a hexagonal structure in the middle for easy installation with tools. The connector has a through hole inside, allowing the pressure inside the hose to be transmitted into the housing 7 and the bellows assembly 9 of the oil pump regulator.

[0030] See Figure 4 and Figure 5 The limiting block 6 is a perforated circular disc structure with an external threaded cylindrical boss, used for connection with the housing. A hexagonal boss is also provided above the cylindrical boss for easy installation and removal using tools. A multi-step groove is provided below the limiting block 6 to facilitate fitting and assembly with the bellows assembly. The external thread is not shown in the diagram.

[0031] In one embodiment, the cylindrical boss is further provided with four equally divided circular holes ∅5, which connect the constant pressure connector end and the external pressure of the bellows assembly.

[0032] The housing 7 is a transparent cube with internal threaded grooves at both ends and a through hole inside. A sensor mounting position marker is located in the center of the outer side. It is the main unit of the life testing fixture. Bellows assembly, O-rings 8, and measuring blocks 10 are installed inside. Constant pressure connector 4 and circulating alternating pressure connector 5 are installed at both ends of the housing opening. Eddy current displacement sensor 11 is fixedly installed on the outside of housing 7, aligned with the center of measuring block 10.

[0033] In one embodiment, the housing 7 is made of plexiglass. This facilitates observation of the internal structure and the detection of its characteristics.

[0034] In one embodiment, an O-ring 8 is installed between the housing 7 and the circulating alternating air pressure end and the bellows assembly for sealing purposes.

[0035] Optionally, the measuring block 10 is mounted on the center pin of the bellows assembly, and a constant pressure is maintained between the housing 7 and the bellows assembly. The bellows assembly senses the cyclic pressure from the circulating alternating end. The measuring block 10 moves with the bellows assembly, triggering the eddy current displacement sensor 11 to record displacement data, thereby determining the performance changes of the oil pump regulator bellows assembly during its life test.

[0036] The working principle of the present invention for the life testing device of the bellows assembly of the oil pump regulator is as follows: See Figure 1 Before the test, connect the gas tank 1, gas source pressure conversion device 2, circulation switch controller 3, constant air pressure connector 4, and circulating alternating air pressure connector 5 through pressure hoses.

[0037] Install the limiting block 6 from the constant air pressure end of the housing 7. Use a wrench to drive the hexagonal boss and tighten the limiting block 6 to the bottom of the thread. Install the O-ring on the groove of the oil pump regulator, install the measuring block on the pin, and insert it from the other end (circulating pressure end) of the housing 7 as shown in the figure until it touches the limiting block 6.

[0038] Connect the constant pressure connector 4 and the circulating alternating pressure connector 5 to both ends of the housing 7, and install the eddy current displacement sensor 11 on the outside. Complete the overall connection of the life test device.

[0039] See Figure 2 By providing constant pressure and circulating pressure to the outside and inside of the bellows assembly of the oil pump regulator respectively (orange in the figure represents constant pressure, and blue represents circulating pressure), the actual working conditions of the product are simulated, so that the product senses the pressure and outputs displacement. One cycle represents one operation, and the life test can be completed within a specified number of times and time.

[0040] join Figure 3 The movement of the measuring block 10 is detected by the eddy current displacement sensor 11. Since the angle of the measuring block is 45°, the vertical displacement change is converted into horizontal displacement, and the displacement performance of the product output is detected.

[0041] Under specified conditions, life tests are conducted to examine and compare the performance of the oil pump regulator bellows assembly before and after the life test, thereby evaluating the product's reliability and durability.

[0042] This invention can accurately simulate the installation and working conditions of bellows components, and can judge and measure motion. By controlling the pressure, it can complete the life test under specified conditions and evaluate the reliability and durability of the product.

[0043] The above description merely illustrates embodiments of the present invention and is quite specific and detailed; however, it should not be construed as limiting the scope of the patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Furthermore, any parts of the present invention not described in detail are conventional techniques.

Claims

1. A device for testing the lifespan of bellows assemblies in oil pump regulators, characterized in that... include: Gas tank (1), gas source pressure conversion device (2), circulation switch controller (3), constant air pressure connector (4), circulating alternating air pressure connector (5), limit block (6), housing (7), measuring block (10), displacement sensor (11). The gas tank (1) is connected to the inlet port of the gas source pressure conversion device (2), the outlet port of the gas source pressure conversion device (2) is connected to one end of the constant pressure connector (4) and the pressure inlet of the circulation switch controller (3), and the pressure outlet of the circulation switch controller (3) is connected to one end of the circulating alternating pressure connector (5). The other end of the constant pressure connector (4) is connected to one end of the housing (7); the other end of the circulating alternating pressure connector (5) is connected to the other end of the housing (7); the bellows assembly is located inside the housing (7); The limiting block (6) is fixed inside the housing (7) and located between the constant pressure connector (4) and the bellows assembly, and is pressed tightly. The limiting block (6) is provided with a through hole on the outer surface of the bellows assembly, which allows the constant pressure to pass through the limiting block (6). The measuring block (10) is installed in the middle of the bellows assembly and can move axially with the product. The horizontal displacement is equal to the vertical displacement. The displacement sensor (11) is fixedly installed on the outside of the housing (7) and aligned with the middle position of the measuring block (10).

2. The apparatus according to claim 1, characterized in that, The measuring block (10) is a triangular trapezoidal boss structure with an angle of 45 degrees, and is made of metal.

3. The apparatus according to claim 1, characterized in that, An O-ring (8) is provided between the housing (7) and the bellows assembly to isolate and seal the constant external pressure and the cyclic alternating internal pressure of the bellows assembly.

4. The apparatus according to claim 1, characterized in that, The limiting block (6) has a cylindrical boss with an outer circular thread structure, and a hexagonal boss is also provided above the cylindrical boss; a multi-step groove is provided below the limiting block (6).

5. The apparatus according to claim 4, characterized in that, The cylindrical boss is also provided with multiple equally spaced circular holes that connect the constant pressure connector end and the external pressure of the bellows assembly.

6. The apparatus according to claim 1, characterized in that, The constant pressure connector (4) is connected to the air source pressure conversion device (2), the circulating alternating pressure connector (5) is connected to the circulating switch controller (3) through a pressure hose. The constant pressure connector (4) and the circulating alternating pressure connector (5) are double threaded adapters. The double threaded connector has a hexagonal structure in the middle and a through hole inside, so that the pressure in the pressure hose is transmitted into the housing (7) and the bellows assembly (9).

7. The apparatus according to claim 1, characterized in that, The housing (7) is a transparent cube with internal threaded grooves at both ends, a through hole inside, and a sensor mounting position mark in the middle of the outer side.

8. The apparatus according to claim 1, characterized in that, The shell (7) is made of plexiglass.

9. The apparatus according to claim 1, characterized in that, The cycle switch controller (3) consists of a power switch, a circulator, a counter, a solenoid valve, a flow control valve, a pressure gauge, a first three-way valve, and a second three-way valve. The circulator is connected to the solenoid valve and the flow control valve. The solenoid valve is also connected to the air source pressure conversion device (2) and the first three-way valve. The first three-way valve is connected to the pressure gauge and the second three-way valve. The second three-way valve is connected to the flow control valve and the cycle alternating air pressure connector (5).

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