CN108180874A - A kind of normally close valve stroke measuring device and method - Google Patents

Abstract

The invention provides a normally closed valve stroke measuring device and method. The device at least includes: a stylus, a stylus seat, a bolt, a coil winding support seat, a stroke measuring base and a coil winding, wherein: the stylus is installed on the stylus seat to form a first combined structure, and the The second surface of the stylus is connected to the sealing steel ball of the normally closed valve; the coil winding surrounds the normally closed valve, and is embedded in the coil winding supporting seat to form a second combined structure; the bolt is used for tightening Fix the first combined structure and the second combined structure; the base of the measuring stroke is placed on a horizontal plane, and the combination of the first combined structure and the second combined structure fastened with bolts is placed on the measuring stroke on the travel base. The device and method provided by the invention can quickly, efficiently and accurately measure the working stroke of the normally closed valve.

Description

Device and method for measuring stroke of normally closed valve

technical field

The invention relates to the technical field of automobiles, in particular to a device and method for measuring the stroke of a normally closed valve.

Background technique

The normally closed valve used in the anti-lock braking system (ABS) and electronic stability control program (ESP) of automobiles is constructed as a solenoid valve that is energized to open. The ABS braking adjustment process is divided into three stages: boosting, pressure maintaining and pressure releasing, in which the normally closed valves are closed in the boosting and pressure maintaining stages to increase and maintain the pressure of the brake wheel cylinder, while the pressure releasing stage is normally closed The valve is opened to relieve the excessive pressure of the wheel cylinder to keep the slip ratio of the wheel in the optimum range.

Fig. 1 is the structural representation of the closed state of the normally closed valve in the prior art, as shown in Fig. The moving core (7-4), the valve seat (7-5), and the sealing steel ball (7-6) are composed of the moving core (7-4) and the sealing steel ball (7-6) being connected by riveting to form the moving core assembly . When the normally closed valve is in the closed state, the moving core assembly is under the spring force of the return spring (7-3), and the sealing steel ball (7-6) is pressed against the sealing cone of the valve seat (7-5) to face the inlet. S sealed. Figure 2 is a structural schematic diagram of the open state of the normally closed valve in the prior art. As shown in Figure 2, during the use of the normally closed valve, a coil needs to be added outside the normally closed valve. When the normally closed valve coil is energized, the moving core assembly Under the action of electromagnetic force, it moves toward the static core (7-1), until the bottom surface A of the static core (7-1) coincides with the top surface B of the moving core (7-4), and at the same time, the sealing steel ball (7-6) leaves the valve The seat (7-5) seals the cone surface, the inlet S is opened, and the brake fluid is discharged from the S port to the N port to remove the excessive pressure of the wheel cylinder.

In the closed state of the normally closed valve, there is a gap h between the bottom surface A of the static core (7-1) and the top surface B of the moving core (7-4), and in the open state of the normally closed valve, the bottom surface A of the static core (7-1) and Moving core (7-4) top surface B coincides namely h is equal to 0. h is the working stroke of the normally closed valve. If the working stroke h is too small, the flow channel formed by the sealing steel ball (7-6) and the sealing cone surface of the valve seat (7-5) is too small, the excessive pressure of the wheel cylinder cannot be released, and the wheel may appear locked, side slip. If the working stroke h is too large, the coil needs to provide a stronger magnetic field, otherwise the bottom surface A of the static core (7-1) and the top surface B of the moving core (7-4) cannot overlap, and the normally closed valve cannot be fully opened. Therefore, how to propose a method and a device that can improve the accuracy of measuring the working stroke of the normally closed valve has become an urgent problem to be solved.

Contents of the invention

The invention provides a device and method for measuring the stroke of a normally closed valve.

In the first aspect, the present invention provides a stroke measuring device for a normally closed valve, which at least includes: a stylus, a stylus seat, a bolt, a coil winding support seat, a stroke measuring base and a coil winding, wherein:

The stylus is installed on the stylus seat to form a first combination structure, and the second surface of the stylus is connected to the sealing steel ball of the normally closed valve;

The coil winding surrounds the normally closed valve and is embedded in the coil winding support base to form a second combined structure;

The bolts are used to fasten the first composite structure and the second composite structure;

The stroke measuring base is placed on a horizontal plane, and the combination of the first combined structure and the second combined structure fastened with bolts is placed on the measured stroke base.

In a second aspect, the present invention provides a method for measuring the stroke of a normally closed valve, comprising:

Obtain the first position point of the stylus with coil winding energized;

obtaining a second position point of the stylus with the coil winding de-energized;

Through the first position point and the second position point, the working stroke of the normally closed valve is calculated.

The device and method for measuring the stroke of a normally closed valve provided by the present invention can measure the working stroke of the normally closed valve quickly, efficiently and accurately through the tooling including the measuring needle, the needle seat, the bolt, the coil winding support seat and the stroke measuring base. It can accurately measure the working stroke of the normally closed valve in the anti-lock braking system and electronic stability control program of the automobile.

Description of drawings

In order to more clearly illustrate the present invention or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are the present invention. For some embodiments of the invention, those skilled in the art can also obtain other drawings based on these drawings without creative effort.

Fig. 1 is the structural representation of normally closed valve closing state in the prior art;

Fig. 2 is a structural schematic diagram of the open state of the normally closed valve in the prior art;

Fig. 3 is a structural schematic diagram of a normally closed valve stroke measuring device provided by an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a stylus provided by an embodiment of the present invention;

Fig. 5 is a structural schematic diagram of a stroke measuring base provided by an embodiment of the present invention;

Fig. 6 is a flowchart of a method for measuring the stroke of a normally closed valve provided by an embodiment of the present invention.

Explanation of reference signs:

1—stylus; 2—style seat; 3—bolt;

4—coil winding support seat; 5—travel measuring base; 6—coil winding;

7—normally closed valve; C—the first surface of the stylus; D—the second surface of the stylus;

E—the opening of the stroke measuring base; F—the center line of the stylus; 6-1—the coil end cover;

6-2—enameled wire; 6-3—winding barrel; 6-4—PIN needle.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the present invention Examples, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Fig. 3 is a structural schematic diagram of the normally closed valve stroke measuring device provided by the embodiment of the present invention. 6, of which:

The stylus 1 is installed on the stylus seat 2 to form a first combined structure, and the second surface of the stylus 1 is connected to the sealing steel ball of the normally closed valve;

The coil winding 6 surrounds the normally closed valve and is embedded in the coil winding support seat 4 to form a second combined structure;

The bolt 3 is used to fasten the first combination structure and the second combination structure;

The stroke measuring base 5 is placed on a horizontal plane, and the combination of the first combined structure and the second combined structure fastened with bolts is placed on the measuring stroke base 5 .

The normally closed valve stroke measuring device provided by the embodiment of the present invention includes a measuring needle 1, a measuring needle seat 2, a bolt 3, a coil winding support seat 4, a stroke measuring base 5 and a coil winding 6. When measuring the stroke of a normally closed valve Sometimes, the normally closed valve needs to be installed in the measuring device first, and then the stroke of the normally closed valve is measured.

Wherein, the stylus 1 is installed on the stylus seat 2 to form a first combination structure, and the second surface of the stylus 1 is inserted into the hole of the stylus seat 2, and passes through the valve seat inlet hole The sealing steel ball that S withstands.

The coil winding 6 surrounds the normally closed valve, and the coil winding 6 surrounding the normally closed valve and the normally closed valve are embedded into the coil winding support seat 4 to form a second combined structure;

The bolt 3 fastens the combined first combined structure and the second combined structure;

The stroke measuring base 5 is placed on a horizontal workbench, and the combination of the first combined structure and the second combined structure fastened with bolts is placed on the measured stroke base 5 .

The specific installation steps are as follows:

1) Press the normally closed valve coil winding 6 into the coil winding support seat 4;

2) Assemble the completed structure in step 1), the probe seat 2 and the normally closed valve 7 according to the structure shown in Figure 3, and fasten the assembly with bolts 3;

3) Put the assembled structure in step 2) on the stroke measuring base 5, and place the stroke measuring base 5 on the horizontal workbench;

4) Insert the small end of the stylus 1 (that is, the end of the second surface) into the hole 2 of the stylus seat, and pass through the valve seat 7-5 into the flow hole S to withstand the sealing steel ball 7-6 of the normally closed valve 7.

The normally closed valve stroke measurement device provided by the embodiment of the present invention measures the working stroke of the normally closed valve through the tooling including the stylus, the stylus seat, the bolt, the coil winding support seat and the stroke measurement base, which can be quickly, efficiently and accurately It can accurately measure the working stroke of the normally closed valve in the anti-lock braking system and electronic stability control program of the automobile.

Optionally, the device further includes: a displacement sensor, configured to monitor displacement changes of the first surface of the measuring needle 1 .

On the basis of the above embodiments, the device also includes a displacement sensor, which can be installed directly above the stylus 1, and is used to detect the displacement change of the first surface of the stylus when the stroke of the normally closed valve changes. .

The normally closed valve stroke measurement device provided by the embodiment of the present invention measures the working stroke of the normally closed valve through the tooling including the stylus, the stylus seat, the bolt, the coil winding support seat and the stroke measurement base, which can be quickly, efficiently and accurately It can accurately measure the working stroke of the normally closed valve in the anti-lock braking system and electronic stability control program of the automobile.

Fig. 4 is a schematic structural view of the stylus provided by the embodiment of the present invention. As shown in Fig. 4, the stylus 1 includes at least a first surface C and a second surface D, and the first surface C and the second surface Surface D is perpendicular to centerline F.

On the basis of the above embodiments, the stylus 1 includes a first surface C and a second surface D, one end of the first surface C is larger than one end of the second surface D, and the first surface C and the second surface The surface D is perpendicular to the center line F to ensure accurate measurement of the working stroke.

The normally closed valve stroke measurement device provided by the embodiment of the present invention measures the working stroke of the normally closed valve through the tooling including the stylus, the stylus seat, the bolt, the coil winding support seat and the stroke measurement base, which can be quickly, efficiently and accurately It can accurately measure the working stroke of the normally closed valve in the anti-lock braking system and electronic stability control program of the automobile.

Fig. 5 is a schematic structural diagram of a stroke measuring base provided by an embodiment of the present invention. As shown in Fig. 5, the stroke measuring base 5 includes an opening E for installing a power supply device.

On the basis of the above-mentioned embodiment, there is an opening E on one side of the stroke measuring base 5, which is used to install the power supply equipment. The location is used to install power supply equipment.

The normally closed valve stroke measurement device provided by the embodiment of the present invention measures the working stroke of the normally closed valve through the tooling including the stylus, the stylus seat, the bolt, the coil winding support seat and the stroke measurement base, which can be quickly, efficiently and accurately It can accurately measure the working stroke of the normally closed valve in the anti-lock braking system and electronic stability control program of the automobile.

Optionally, the coil winding 6 includes a coil end cap 6-1, an enameled wire 6-2, a bobbin 6-3 and a PIN pin 6-4, wherein the coil end cap 6-1 is used to communicate with the The interference fit of the coil winding support base 4, the PIN pin 6-4 is used to connect the power supply device.

On the basis of the above embodiments, the coil winding 6 includes four parts, the coil end cap 6-1, the enameled wire 6-2, the bobbin 6-3 and the PIN pin 6-4, wherein the coil end cap 6- 1 is an interference fit with the coil winding support seat 4 during installation, and the interference position is the outer circular surface of the coil winding 6-1, so as to prevent the position change of the coil winding 6 from affecting the stroke measurement result of the normally closed valve; the enameled wire 6- 2 is used to generate electromagnetic force in the energized state; the bobbin 6-3 is used to support the enameled wire 6-2, and the enameled wire 6-2 is wound on the bobbin 6-3, and the PIN needle 6-4 is used to connect The power supply device supplies power to the coil.

The normally closed valve stroke measurement device provided by the embodiment of the present invention measures the working stroke of the normally closed valve through the tooling including the stylus, the stylus seat, the bolt, the coil winding support seat and the stroke measurement base, which can be quickly, efficiently and accurately It can accurately measure the working stroke of the normally closed valve in the anti-lock braking system and electronic stability control program of the automobile.

Fig. 6 is a flowchart of a method for measuring the stroke of a normally closed valve provided by an embodiment of the present invention. As shown in Fig. 6, the method includes:

S101. Obtain the first position point of the stylus with the coil winding energized;

S102. Obtain a second position point of the measuring needle where the coil winding is de-energized;

S103. Calculate the working stroke of the normally closed valve according to the first position point and the second position point.

Based on the above-mentioned tooling assembly, to measure the stroke of the normally closed valve, it is first necessary to obtain the first position point of the probe when the coil winding is energized, and secondly, to obtain the position of the coil winding when it is de-energized. In this case, the second position point of the stylus is obtained, and the working stroke of the normally closed valve is calculated through the obtained first position point and second position point.

The method for measuring the stroke of a normally closed valve provided by the embodiment of the present invention measures the working stroke of the normally closed valve through the tooling including the stylus, the stylus seat, the bolt, the coil winding support seat and the stroke measuring base, which can be fast, efficient and accurate It can accurately measure the working stroke of the normally closed valve in the anti-lock braking system and electronic stability control program of the automobile.

Optionally, the first position point of the stylus for obtaining coil winding energization is specifically:

After the coil winding is energized, the probe moves to the static core along with the moving core assembly of the normally closed valve;

A displacement sensor is used to detect a first position point on the first surface of the stylus.

On the basis of the above embodiments, after the coil winding is energized, an electromagnetic force is generated in the coil winding, so that the moving core assembly of the normally closed valve will move toward the static core. The sealing steel balls of the core assembly are closely connected, so when the moving core assembly moves toward the static core, the stylus also moves with the sealing steel ball, and the displacement sensor installed above the stylus detects the movement of the first surface of the stylus First location point.

It should be noted that the type and model of the displacement sensor are not specifically limited, and the installation position is not limited, as long as the position point on the first surface of the stylus can be detected, the embodiment of the present invention is installed on the stylus , for example.

The method for measuring the stroke of a normally closed valve provided by the embodiment of the present invention measures the working stroke of the normally closed valve through the tooling including the stylus, the stylus seat, the bolt, the coil winding support seat and the stroke measuring base, which can be fast, efficient and accurate It can accurately measure the working stroke of the normally closed valve in the anti-lock braking system and electronic stability control program of the automobile.

Optionally, the acquisition of the second position point of the stylus at which the coil winding is de-energized is:

Cutting off the power supply of the coil winding, the moving core assembly rebounds to the original position;

A displacement sensor is used to detect a second position point on the first surface of the stylus.

On the basis of the above embodiments, after the coil winding is powered off, the electromagnetic field generated by the coil winding disappears, so that the moving core assembly of the normally closed valve is pressed against the sealing cone surface of the valve seat by the spring force of the return spring. The inlet S is sealed, that is, the moving core assembly rebounds to the original position, and the displacement sensor installed above the stylus detects the second position point on the first surface of the stylus.

The method for measuring the stroke of a normally closed valve provided by the embodiment of the present invention measures the working stroke of the normally closed valve through the tooling including the stylus, the stylus seat, the bolt, the coil winding support seat and the stroke measuring base, which can be fast, efficient and accurate It can accurately measure the working stroke of the normally closed valve in the anti-lock braking system and electronic stability control program of the automobile.

Optionally, the coil winding is energized by connecting a DC power supply through a PIN pin of the coil winding.

On the basis of the above embodiments, the coil winding is energized, that is, the coil winding PIN pin is connected to a DC power supply for power supply, wherein the DC power supply can adopt different DC power supply voltages according to different situations, preferably Ground, you can use 13.8V DC power supply.

The device and system embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, It can be located in one place, or it can be distributed to multiple network elements. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without any creative efforts.

Claims (9)

1. a kind of normally close valve stroke measuring device, which is characterized in that described device includes at least：Stylus, stylus seat, bolt, line It encloses winding supporting seat, survey stroke pedestal and coil windings, wherein：

The stylus is mounted on the stylus seat and forms the first composite structure, and the second surface of the stylus be connected to it is normally closed The sealed steel ball of valve；

The coil windings surround the normally close valve, and are embedded into the coil windings support base and form the second combination knot Structure；

The bolt is used to fasten first composite structure and second composite structure；

The survey stroke pedestal is placed in the horizontal plane, and first composite structure and second composite structure are fastened with bolt Combination afterwards is positioned on the survey stroke pedestal.

2. the apparatus according to claim 1, which is characterized in that described device further includes：Displacement sensor, for monitoring State the change in displacement of the first surface of stylus.

3. the apparatus according to claim 1, which is characterized in that the stylus includes at least first surface and second surface, And the first surface and the second surface and central axis.

4. the apparatus according to claim 1, which is characterized in that the survey stroke pedestal includes an opening, for installing Power supply unit.

5. the apparatus according to claim 1, which is characterized in that the coil windings include coil end cap, enameled wire, coiling Cylinder and PIN needle, wherein, for the interference fit with the coil windings support base, the PIN needle is used to connect the coil end cap Connect the power supply unit.

6. a kind of normally close valve stroke-measuring method, which is characterized in that including：

Obtain the first position point for the stylus that coil windings are powered；

Obtain the second position point of the stylus of the coil windings power-off；

By the first position point and second position point, the impulse stroke of normally close valve is calculated.

7. the according to the method described in claim 6, it is characterized in that, first position for obtaining the stylus that coil windings are powered It puts and is specially：

After coil windings are powered, the stylus is moved with the dynamic core assembly of normally close valve to quiet core；

The first position point of the first surface of the stylus is detected using displacement sensor.

8. the according to the method described in claim 6, it is characterized in that, stylus for obtaining coil windings power-off Second position point is：

The power supply of the coil windings is cut off, the dynamic core assembly springs back to home position；

The second position point of the first surface of the stylus is detected using displacement sensor.

9. according to the method described in claim 6, it is characterized in that, the coil windings are powered to pass through the coil windings PIN needle connects DC power supply.